Merge pull request 'Moving away from Azure Devops' (#1) from refac into master

Reviewed-on: http://192.168.1.63:3000/Janus007/Calendar/pulls/1

.claude/settings.local.json

@@ -6,7 +6,30 @@
       "WebFetch(domain:web.dev)",
       "WebFetch(domain:caniuse.com)",
       "WebFetch(domain:blog.rasc.ch)",
-      "WebFetch(domain:developer.chrome.com)"
+      "WebFetch(domain:developer.chrome.com)",
+      "Bash(npx tsc:*)",
+      "WebFetch(domain:github.com)",
+      "Bash(npm install:*)",
+      "WebFetch(domain:raw.githubusercontent.com)",
+      "Bash(npm run css:analyze:*)",
+      "Bash(npm run test:run:*)",
+      "Bash(cd:*)",
+      "Bash(powershell -Command \"Get-ChildItem -Path src -Directory | Select-Object -ExpandProperty Name\")",
+      "Bash(powershell -Command \"Get-ChildItem -Path src -Filter ''index.ts'' -Recurse | Select-Object -ExpandProperty FullName\")",
+      "Bash(powershell -Command:*)",
+      "WebFetch(domain:www.npmjs.com)",
+      "WebFetch(domain:unpkg.com)",
+      "Bash(node -e:*)",
+      "Bash(ls:*)",
+      "Bash(find:*)",
+      "WebFetch(domain:www.elegantthemes.com)",
+      "Bash(npm publish:*)",
+      "Bash(npm init:*)",
+      "Bash(node dist/bundle.js:*)",
+      "Bash(node build.js:*)",
+      "Bash(npm ls:*)",
+      "Bash(npm view:*)",
+      "Bash(npm update:*)"
     ],
     "deny": [],
     "ask": []

.gitignore

@@ -1,7 +1,6 @@
 # Build outputs
 bin/
 obj/
-wwwroot/js/
 
 # Node modules
 node_modules/
@@ -30,4 +29,5 @@ Thumbs.db
 *.suo
 *.userosscache
 *.sln.docstates
-js/
+
+packages/calendar/dist/

.workbench/plan-comparison.md

@@ -0,0 +1,246 @@
+# Plan Sammenligning: Spec vs Min Plan
+
+## 1. Grid Container
+
+| Spec | Min Plan | Kommentar |
+|------|----------|-----------|
+| Ét grid (`ctx.grid`) | To containers (`headerContainer` + `columnContainer`) | **Afvigelse:** Vi har 2 containers for at understøtte header drawer og sticky headers. Spec'en bruger ét grid hvor append-rækkefølge = rækker. |
+
+**Spørgsmål:** Er 2 containers ok, eller skal vi følge spec'en med ét grid?
+
+---
+
+## 2. RenderContext
+
+| Spec | Min Plan |
+|------|----------|
+| `{ grid: HTMLElement, teams: Team[] }` | `{ headerContainer: HTMLElement, columnContainer: HTMLElement }` |
+
+**Spec:**
+```typescript
+interface RenderContext {
+  grid: HTMLElement;
+  teams: Team[];
+}
+```
+
+**Min plan:**
+```typescript
+interface RenderContext {
+  headerContainer: HTMLElement;
+  columnContainer: HTMLElement;
+}
+```
+
+**Kommentar:** Spec'en har `teams` data i context. Min plan har ingen data i context - renderers henter selv. Er det korrekt at fjerne data fra context?
+
+---
+
+## 3. Data Model
+
+| Spec | Min Plan |
+|------|----------|
+| Nested: `team.resources[]`, `resource.dates[]` | Flad med id-relationer, renderers henter selv |
+
+**Spec:**
+```typescript
+interface Team {
+  id: string;
+  name: string;
+  resources: Resource[];  // nested
+}
+```
+
+**Min plan:**
+```typescript
+// Hardcoded i renderer
+private resourcesByTeam = {
+  'team1': ['res1', 'res2'],  // kun ids
+  'team2': ['res3']
+};
+```
+
+**Kommentar:** Spec'en har nested data. Min plan bruger id-relationer og renderers slår selv op. Begge dele virker - min plan er mere fleksibel for store datasets.
+
+---
+
+## 4. Renderer Interface
+
+| Spec | Min Plan |
+|------|----------|
+| `render(ctx): void` | `render(ids, next, context): void` |
+
+**Spec:**
+```typescript
+interface Renderer {
+  id: string;
+  next: Renderer | null;
+  render(ctx: RenderContext): void;
+}
+```
+
+**Min plan:**
+```typescript
+interface IGroupingRenderer {
+  readonly type: string;
+  count?(ids: string[], next: NextFunction): number;
+  render(ids: string[], next: NextFunction, context: RenderContext): void;
+}
+```
+
+**Kommentar:**
+- Spec'en: Renderer har `next` som property, kalder selv `this.next.render(ctx)`
+- Min plan: `next` kommer som parameter, kalder `next.render(ids)`
+
+Min plan sender ids eksplicit. Spec'en bruger nested data så ids er unødvendige.
+
+---
+
+## 5. Pipeline / Builder
+
+| Spec | Min Plan |
+|------|----------|
+| `buildPipeline()` linker `renderer.next` | `RenderBuilder` med `buildChain()` |
+
+**Spec:**
+```typescript
+function buildPipeline(renderers: Renderer[]) {
+  for (let i = 0; i < renderers.length - 1; i++) {
+    renderers[i].next = renderers[i + 1];
+  }
+  return { run(ctx) { first.render(ctx); } };
+}
+```
+
+**Min plan:**
+```typescript
+class RenderBuilder {
+  add(renderer): this { ... }
+  build(startIds): void { ... }
+  private buildChain(index): NextFunction { ... }
+}
+```
+
+**Kommentar:** Samme koncept, forskellig implementering. Spec'en muterer renderers (`next` property). Min plan bruger closures (functional chain).
+
+---
+
+## 6. Colspan Beregning
+
+| Spec | Min Plan |
+|------|----------|
+| Beregnes før render: `team.resources.length` | Beregnes via `next.count()` |
+
+**Spec:**
+```typescript
+// I renderer
+cell.style.setProperty('--team-cols', team.resources.length.toString());
+```
+
+**Min plan:**
+```typescript
+// I renderer
+const colspan = next.count(resourceIds);
+cell.style.setProperty('--team-cols', String(colspan));
+```
+
+**Kommentar:** Spec'en ved colspan direkte fra nested data. Min plan kalder `next.count()` rekursivt for at beregne. Resultat er det samme.
+
+---
+
+## 7. CSS Custom Properties
+
+| Spec | Min Plan |
+|------|----------|
+| `--total-cols`, `--team-cols` | `--grid-columns`, `--team-cols` |
+
+**Kommentar:** Næsten identisk. Begge bruger CSS vars til dynamisk colspan.
+
+---
+
+## 8. Append Rækkefølge
+
+| Spec | Min Plan |
+|------|----------|
+| Alle teams → alle resources → alle dates | Per team: resources → dates |
+
+**Spec flow:**
+```
+TeamRenderer: append team1, team2, team3 headers
+ResourceRenderer: append res1, res2, res3, res4 headers
+DateRenderer: append alle dates
+```
+
+**Min plan flow:**
+```
+TeamRenderer:
+  append team1 header → next.render(['res1','res2'])
+    ResourceRenderer: append res1 → next.render(dates)
+                      append res2 → next.render(dates)
+  append team2 header → next.render(['res3'])
+    ResourceRenderer: append res3 → next.render(dates)
+```
+
+**Kommentar:** Dette er en **væsentlig forskel**.
+
+Spec'en renderer alle teams først, så alle resources, så alle dates - CSS grid auto-row placerer dem.
+
+Min plan renderer nested: team1 → team1's resources → team1's dates → team2 → osv.
+
+**Spørgsmål:** Hvilken approach foretrækker du? Spec'ens "lag for lag" eller min "nested traversal"?
+
+---
+
+## 9. Hvem kalder next?
+
+| Spec | Min Plan |
+|------|----------|
+| Renderer kalder `this.next.render(ctx)` efter egen render | Renderer kalder `next.render(ids)` per item |
+
+**Spec:**
+```typescript
+render(ctx) {
+  // render alle teams
+  for (const team of ctx.teams) { ... }
+  // derefter kald next
+  if (this.next) this.next.render(ctx);
+}
+```
+
+**Min plan:**
+```typescript
+render(ids, next, context) {
+  for (const id of ids) {
+    // render ét team
+    next.render(childIds);  // kald next PER team
+  }
+}
+```
+
+**Kommentar:** Spec'en kalder next ÉN gang efter alle items. Min plan kalder next PER item. Dette hænger sammen med punkt 8.
+
+---
+
+## Opsummering af Afvigelser
+
+| # | Emne | Status |
+|---|------|--------|
+| 1 | 2 containers vs 1 grid | **Accepteret** (header drawer) |
+| 2 | Data i context | **Afvigelse** - fjernet |
+| 3 | Nested vs flad data | **Accepteret** (id-relationer) |
+| 4 | next som parameter vs property | **Afvigelse** - funktionel |
+| 5 | Pipeline implementation | Lignende |
+| 6 | Colspan beregning | Lignende |
+| 7 | CSS vars | Identisk |
+| 8 | Render rækkefølge | **Væsentlig afvigelse** |
+| 9 | Hvornår next kaldes | **Væsentlig afvigelse** |
+
+---
+
+## Åbne Spørgsmål
+
+1. **Render rækkefølge:** Skal vi følge spec'ens "lag for lag" approach, eller er "nested traversal" ok?
+
+2. **Context data:** Spec'en har `teams` i context. Skal vi have noget data i context, eller er det ok at renderers henter selv?
+
+3. **2 containers:** Er det ok at beholde 2 containers for header drawer support?

.workbench/projectstructure.txt

@@ -0,0 +1,86 @@
+
+
+Organizing Project Folder Structure: Function-Based vs Feature-Based
+Ina Lopez
+Ina Lopez
+
+Follow
+2 min read
+·
+Sep 3, 2024
+12
+
+
+
+
+When setting up a project, one of the most crucial decisions is how to organize the folder structure. The structure you choose can significantly impact productivity, scalability, and collaboration among developers. Two common approaches are function-based and feature-based organization. Both have their advantages, and the choice between them often depends on the size of the project and the number of developers involved.
+
+Function-Based Organization
+
+In a function-based folder structure, directories are organized based on the functions they provide. This is a popular approach, especially for smaller projects or teams. The idea is to group similar functionalities together, making it easy to locate specific files or components.
+
+For example, in a React project, the src directory might look like this:
+
+src/
+├── components/
+├── hooks/
+├── utils/
+
+Each folder contains files related to a specific function. Components, hooks, reducers, and utilities are neatly separated, making it easy to find and manage related code. This structure works well when the codebase is relatively small and developers need to quickly find and reuse functions.
+
+Pros:
+
+Easy to find similar functions.
+Encourages reuse of components and utilities.
+Clean and straightforward structure.
+Cons:
+
+As the project grows, it can become difficult to manage.
+Dependencies between different folders can increase complexity.
+Not ideal for teams working on different features simultaneously.
+Feature-Based Organization
+In larger projects with many developers, a feature-based folder structure can be more effective. Instead of organizing files by function, the top-level directories in the src folder are based on features or modules of the application. This approach allows teams to work on separate features independently without interfering with other parts of the codebase.
+
+Get Ina Lopez’s stories in your inbox
+Join Medium for free to get updates from this writer.
+
+Enter your email
+Subscribe
+For example, a feature-based structure might look like this:
+
+src/
+├─ signup/
+│ ├── components/
+│ ├── hooks/
+│ └── utils/
+├─ checkout/
+│ ├── components/
+│ ├── hooks/
+│ └── utils/
+├─ dashboard/
+│ ├── components/
+│ ├── hooks/
+│ └── utils/
+└─ profile/
+├── components/
+├── hooks/
+└── utils/
+
+Each folder contains all the components, hooks, reducers, and utilities specific to that feature. This structure makes it easier for developers to focus on specific features, reduces conflicts, and simplifies the onboarding process for new team members.
+
+Pros:
+
+Better suited for larger projects with multiple developers.
+Encourages modularity and separation of concerns.
+Easier to manage and scale as the project grows.
+Reduces the risk of conflicts between different teams.
+Cons:
+
+Some duplication of code across features is possible.
+Finding reusable components can be more challenging.
+Can be overwhelming if the project has too many small features.
+Conclusion
+Choosing the right folder structure depends on your project’s size and team dynamics. Function-based organization is ideal for small to medium projects with fewer developers, offering simplicity and ease of reuse. However, as your project grows and more developers are involved, a feature-based approach becomes more effective, enabling modularity, better collaboration, and easier scaling.
+
+For some projects, a hybrid approach might work best, combining both methods to balance flexibility and organization. Ultimately, the key is to select a structure that supports the current and future needs of your project and team.
+ 

.workbench/scenarios/v2-scenario-renderer.js

@@ -0,0 +1,323 @@
+/**
+ * V2 Scenario Renderer
+ * Uses EventLayoutEngine from V2 to render events dynamically
+ */
+
+// Import the compiled V2 layout engine
+// We'll inline the algorithm here for standalone use in browser
+
+// ============================================
+// EventLayoutEngine (copied from V2 for browser use)
+// ============================================
+
+function eventsOverlap(a, b) {
+  return a.start < b.end && a.end > b.start;
+}
+
+function eventsWithinThreshold(a, b, thresholdMinutes) {
+  const thresholdMs = thresholdMinutes * 60 * 1000;
+
+  const startToStartDiff = Math.abs(a.start.getTime() - b.start.getTime());
+  if (startToStartDiff <= thresholdMs) return true;
+
+  const bStartsBeforeAEnds = a.end.getTime() - b.start.getTime();
+  if (bStartsBeforeAEnds > 0 && bStartsBeforeAEnds <= thresholdMs) return true;
+
+  const aStartsBeforeBEnds = b.end.getTime() - a.start.getTime();
+  if (aStartsBeforeBEnds > 0 && aStartsBeforeBEnds <= thresholdMs) return true;
+
+  return false;
+}
+
+function findOverlapGroups(events) {
+  if (events.length === 0) return [];
+
+  const sorted = [...events].sort((a, b) => a.start.getTime() - b.start.getTime());
+  const used = new Set();
+  const groups = [];
+
+  for (const event of sorted) {
+    if (used.has(event.id)) continue;
+
+    const group = [event];
+    used.add(event.id);
+
+    let expanded = true;
+    while (expanded) {
+      expanded = false;
+      for (const candidate of sorted) {
+        if (used.has(candidate.id)) continue;
+
+        const connects = group.some(member => eventsOverlap(member, candidate));
+
+        if (connects) {
+          group.push(candidate);
+          used.add(candidate.id);
+          expanded = true;
+        }
+      }
+    }
+
+    groups.push(group);
+  }
+
+  return groups;
+}
+
+function findGridCandidates(events, thresholdMinutes) {
+  if (events.length === 0) return [];
+
+  const sorted = [...events].sort((a, b) => a.start.getTime() - b.start.getTime());
+  const used = new Set();
+  const groups = [];
+
+  for (const event of sorted) {
+    if (used.has(event.id)) continue;
+
+    const group = [event];
+    used.add(event.id);
+
+    let expanded = true;
+    while (expanded) {
+      expanded = false;
+      for (const candidate of sorted) {
+        if (used.has(candidate.id)) continue;
+
+        const connects = group.some(member =>
+          eventsWithinThreshold(member, candidate, thresholdMinutes)
+        );
+
+        if (connects) {
+          group.push(candidate);
+          used.add(candidate.id);
+          expanded = true;
+        }
+      }
+    }
+
+    groups.push(group);
+  }
+
+  return groups;
+}
+
+function calculateStackLevels(events) {
+  const levels = new Map();
+  const sorted = [...events].sort((a, b) => a.start.getTime() - b.start.getTime());
+
+  for (const event of sorted) {
+    let maxOverlappingLevel = -1;
+
+    for (const [id, level] of levels) {
+      const other = events.find(e => e.id === id);
+      if (other && eventsOverlap(event, other)) {
+        maxOverlappingLevel = Math.max(maxOverlappingLevel, level);
+      }
+    }
+
+    levels.set(event.id, maxOverlappingLevel + 1);
+  }
+
+  return levels;
+}
+
+function allocateColumns(events) {
+  const sorted = [...events].sort((a, b) => a.start.getTime() - b.start.getTime());
+  const columns = [];
+
+  for (const event of sorted) {
+    let placed = false;
+    for (const column of columns) {
+      const canFit = !column.some(e => eventsOverlap(event, e));
+      if (canFit) {
+        column.push(event);
+        placed = true;
+        break;
+      }
+    }
+
+    if (!placed) {
+      columns.push([event]);
+    }
+  }
+
+  return columns;
+}
+
+function calculateEventPosition(start, end, config) {
+  const startMinutes = start.getHours() * 60 + start.getMinutes();
+  const endMinutes = end.getHours() * 60 + end.getMinutes();
+
+  const dayStartMinutes = config.dayStartHour * 60;
+  const minuteHeight = config.hourHeight / 60;
+
+  const top = (startMinutes - dayStartMinutes) * minuteHeight;
+  const height = (endMinutes - startMinutes) * minuteHeight;
+
+  return { top, height };
+}
+
+function calculateColumnLayout(events, config) {
+  const thresholdMinutes = config.gridStartThresholdMinutes ?? 30;
+
+  const result = {
+    grids: [],
+    stacked: []
+  };
+
+  if (events.length === 0) return result;
+
+  const overlapGroups = findOverlapGroups(events);
+
+  for (const overlapGroup of overlapGroups) {
+    if (overlapGroup.length === 1) {
+      result.stacked.push({
+        event: overlapGroup[0],
+        stackLevel: 0
+      });
+      continue;
+    }
+
+    const gridSubgroups = findGridCandidates(overlapGroup, thresholdMinutes);
+
+    const largestGridCandidate = gridSubgroups.reduce((max, g) =>
+      g.length > max.length ? g : max, gridSubgroups[0]);
+
+    if (largestGridCandidate.length === overlapGroup.length) {
+      const columns = allocateColumns(overlapGroup);
+      const earliest = overlapGroup.reduce((min, e) =>
+        e.start < min.start ? e : min, overlapGroup[0]);
+      const position = calculateEventPosition(earliest.start, earliest.end, config);
+
+      result.grids.push({
+        events: overlapGroup,
+        columns,
+        stackLevel: 0,
+        position: { top: position.top }
+      });
+    } else {
+      const levels = calculateStackLevels(overlapGroup);
+      for (const event of overlapGroup) {
+        result.stacked.push({
+          event,
+          stackLevel: levels.get(event.id) ?? 0
+        });
+      }
+    }
+  }
+
+  return result;
+}
+
+// ============================================
+// Scenario Renderer
+// ============================================
+
+const gridConfig = {
+  hourHeight: 80,
+  dayStartHour: 8,
+  dayEndHour: 20,
+  snapInterval: 15,
+  gridStartThresholdMinutes: 30
+};
+
+function formatTime(date) {
+  return date.toLocaleTimeString('da-DK', { hour: '2-digit', minute: '2-digit' });
+}
+
+function createEventElement(event, config) {
+  const element = document.createElement('swp-event');
+  element.dataset.eventId = event.id;
+
+  const position = calculateEventPosition(event.start, event.end, config);
+  element.style.position = 'absolute';
+  element.style.top = `${position.top}px`;
+  element.style.height = `${position.height}px`;
+  element.style.left = '2px';
+  element.style.right = '2px';
+
+  element.innerHTML = `
+    <swp-event-time>${formatTime(event.start)} - ${formatTime(event.end)}</swp-event-time>
+    <swp-event-title>${event.title}</swp-event-title>
+  `;
+
+  return element;
+}
+
+function renderGridGroup(layout, config) {
+  const group = document.createElement('swp-event-group');
+  group.classList.add(`cols-${layout.columns.length}`);
+  group.style.top = `${layout.position.top}px`;
+
+  // Stack level styling
+  group.dataset.stackLink = JSON.stringify({ stackLevel: layout.stackLevel });
+  if (layout.stackLevel > 0) {
+    group.style.marginLeft = `${layout.stackLevel * 15}px`;
+    group.style.zIndex = `${100 + layout.stackLevel}`;
+  }
+
+  // Calculate height
+  let maxBottom = 0;
+  for (const event of layout.events) {
+    const pos = calculateEventPosition(event.start, event.end, config);
+    const eventBottom = pos.top + pos.height;
+    if (eventBottom > maxBottom) maxBottom = eventBottom;
+  }
+  group.style.height = `${maxBottom - layout.position.top}px`;
+
+  // Create columns
+  layout.columns.forEach(columnEvents => {
+    const wrapper = document.createElement('div');
+    wrapper.style.position = 'relative';
+
+    columnEvents.forEach(event => {
+      const eventEl = createEventElement(event, config);
+      const pos = calculateEventPosition(event.start, event.end, config);
+      eventEl.style.top = `${pos.top - layout.position.top}px`;
+      eventEl.style.left = '0';
+      eventEl.style.right = '0';
+      wrapper.appendChild(eventEl);
+    });
+
+    group.appendChild(wrapper);
+  });
+
+  return group;
+}
+
+function renderStackedEvent(event, stackLevel, config) {
+  const element = createEventElement(event, config);
+
+  element.dataset.stackLink = JSON.stringify({ stackLevel });
+
+  if (stackLevel > 0) {
+    element.style.marginLeft = `${stackLevel * 15}px`;
+    element.style.zIndex = `${100 + stackLevel}`;
+  } else {
+    element.style.zIndex = '100';
+  }
+
+  return element;
+}
+
+export function renderScenario(container, events, config = gridConfig) {
+  container.innerHTML = '';
+
+  const layout = calculateColumnLayout(events, config);
+
+  // Render grids
+  layout.grids.forEach(grid => {
+    const groupEl = renderGridGroup(grid, config);
+    container.appendChild(groupEl);
+  });
+
+  // Render stacked events
+  layout.stacked.forEach(item => {
+    const eventEl = renderStackedEvent(item.event, item.stackLevel, config);
+    container.appendChild(eventEl);
+  });
+
+  return layout;
+}
+
+export { calculateColumnLayout, gridConfig };

.workbench/scenarios/v2-scenarios.html

@@ -0,0 +1,307 @@
+<!DOCTYPE html>
+<html lang="da">
+<head>
+  <meta charset="UTF-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1.0">
+  <title>V2 Event Layout Engine - All Scenarios</title>
+  <link rel="stylesheet" href="scenario-styles.css">
+  <style>
+    .scenarios-grid {
+      display: grid;
+      grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
+      gap: 20px;
+      margin-top: 20px;
+    }
+
+    .scenario-card {
+      background: white;
+      border: 1px solid #ddd;
+      border-radius: 8px;
+      padding: 15px;
+    }
+
+    .scenario-card h3 {
+      margin-top: 0;
+      display: flex;
+      justify-content: space-between;
+      align-items: center;
+    }
+
+    .calendar-column {
+      height: 600px;
+      margin-top: 10px;
+    }
+
+    .summary {
+      background: #f0f0f0;
+      padding: 20px;
+      border-radius: 8px;
+      margin-bottom: 20px;
+    }
+
+    .summary h2 {
+      margin-top: 0;
+    }
+
+    .pass-count { color: #4caf50; font-weight: bold; }
+    .fail-count { color: #f44336; font-weight: bold; }
+
+    .expected-info {
+      font-size: 12px;
+      color: #666;
+      background: #f8f9fa;
+      padding: 8px;
+      border-radius: 4px;
+      margin-bottom: 10px;
+    }
+  </style>
+</head>
+<body>
+  <div class="scenario-container" style="max-width: 1600px;">
+    <h1>V2 Event Layout Engine - Visual Tests</h1>
+
+    <div class="summary">
+      <h2>Test Summary</h2>
+      <p>
+        <span class="pass-count" id="pass-count">0</span> passed,
+        <span class="fail-count" id="fail-count">0</span> failed
+      </p>
+      <p>Using V2 EventLayoutEngine with gridStartThresholdMinutes: 30</p>
+    </div>
+
+    <div class="scenarios-grid" id="scenarios-container">
+      <!-- Scenarios will be rendered here -->
+    </div>
+  </div>
+
+  <script type="module">
+    import { renderScenario, calculateColumnLayout, gridConfig } from './v2-scenario-renderer.js';
+    import { ScenarioTestRunner } from './scenario-test-runner.js';
+
+    // ============================================
+    // Scenario Definitions
+    // ============================================
+
+    const scenarios = [
+      {
+        id: 'scenario-1',
+        title: 'Scenario 1: No Overlap',
+        description: 'Three sequential events with no time overlap',
+        events: [
+          { id: 'S1A', title: 'Event A', start: new Date('2025-10-06T10:00'), end: new Date('2025-10-06T11:00') },
+          { id: 'S1B', title: 'Event B', start: new Date('2025-10-06T11:00'), end: new Date('2025-10-06T12:00') },
+          { id: 'S1C', title: 'Event C', start: new Date('2025-10-06T12:00'), end: new Date('2025-10-06T13:00') }
+        ],
+        expected: [
+          { eventId: 'S1A', stackLevel: 0, type: 'stacked' },
+          { eventId: 'S1B', stackLevel: 0, type: 'stacked' },
+          { eventId: 'S1C', stackLevel: 0, type: 'stacked' }
+        ]
+      },
+      {
+        id: 'scenario-2',
+        title: 'Scenario 2: Column Sharing (Grid)',
+        description: 'Two events starting at exactly the same time',
+        events: [
+          { id: 'S2A', title: 'Event A', start: new Date('2025-10-06T10:00'), end: new Date('2025-10-06T11:00') },
+          { id: 'S2B', title: 'Event B', start: new Date('2025-10-06T10:00'), end: new Date('2025-10-06T11:00') }
+        ],
+        expected: [
+          { eventId: 'S2A', stackLevel: 0, cols: 2, type: 'grid' },
+          { eventId: 'S2B', stackLevel: 0, cols: 2, type: 'grid' }
+        ]
+      },
+      {
+        id: 'scenario-3',
+        title: 'Scenario 3: Nested Stacking',
+        description: 'Progressive nesting: A contains B, B contains C, C overlaps D',
+        events: [
+          { id: 'S3A', title: 'Event A', start: new Date('2025-10-06T09:00'), end: new Date('2025-10-06T15:00') },
+          { id: 'S3B', title: 'Event B', start: new Date('2025-10-06T10:00'), end: new Date('2025-10-06T13:00') },
+          { id: 'S3C', title: 'Event C', start: new Date('2025-10-06T11:00'), end: new Date('2025-10-06T12:00') },
+          { id: 'S3D', title: 'Event D', start: new Date('2025-10-06T12:30'), end: new Date('2025-10-06T13:30') }
+        ],
+        expected: [
+          { eventId: 'S3A', stackLevel: 0, type: 'stacked' },
+          { eventId: 'S3B', stackLevel: 1, type: 'stacked' },
+          { eventId: 'S3C', stackLevel: 2, type: 'stacked' },
+          { eventId: 'S3D', stackLevel: 2, type: 'stacked' }
+        ]
+      },
+      {
+        id: 'scenario-4',
+        title: 'Scenario 4: Complex Stacking',
+        description: 'Long event A with nested B, C, D at different times',
+        events: [
+          { id: 'S4A', title: 'Event A', start: new Date('2025-10-06T14:00'), end: new Date('2025-10-06T20:00') },
+          { id: 'S4B', title: 'Event B', start: new Date('2025-10-06T15:00'), end: new Date('2025-10-06T17:00') },
+          { id: 'S4C', title: 'Event C', start: new Date('2025-10-06T15:30'), end: new Date('2025-10-06T16:30') },
+          { id: 'S4D', title: 'Event D', start: new Date('2025-10-06T18:00'), end: new Date('2025-10-06T19:00') }
+        ],
+        expected: [
+          { eventId: 'S4A', stackLevel: 0, type: 'stacked' },
+          { eventId: 'S4B', stackLevel: 1, type: 'stacked' },
+          { eventId: 'S4C', stackLevel: 2, type: 'stacked' },
+          { eventId: 'S4D', stackLevel: 1, type: 'stacked' }
+        ]
+      },
+      {
+        id: 'scenario-5',
+        title: 'Scenario 5: Three Column Share',
+        description: 'Three events all starting at the same time',
+        events: [
+          { id: 'S5A', title: 'Event A', start: new Date('2025-10-06T10:00'), end: new Date('2025-10-06T11:00') },
+          { id: 'S5B', title: 'Event B', start: new Date('2025-10-06T10:00'), end: new Date('2025-10-06T11:00') },
+          { id: 'S5C', title: 'Event C', start: new Date('2025-10-06T10:00'), end: new Date('2025-10-06T11:00') }
+        ],
+        expected: [
+          { eventId: 'S5A', stackLevel: 0, cols: 3, type: 'grid' },
+          { eventId: 'S5B', stackLevel: 0, cols: 3, type: 'grid' },
+          { eventId: 'S5C', stackLevel: 0, cols: 3, type: 'grid' }
+        ]
+      },
+      {
+        id: 'scenario-6',
+        title: 'Scenario 6: Overlapping Pairs',
+        description: 'Two independent pairs of overlapping events',
+        events: [
+          { id: 'S6A', title: 'Event A', start: new Date('2025-10-06T10:00'), end: new Date('2025-10-06T12:00') },
+          { id: 'S6B', title: 'Event B', start: new Date('2025-10-06T11:00'), end: new Date('2025-10-06T12:00') },
+          { id: 'S6C', title: 'Event C', start: new Date('2025-10-06T13:00'), end: new Date('2025-10-06T15:00') },
+          { id: 'S6D', title: 'Event D', start: new Date('2025-10-06T14:00'), end: new Date('2025-10-06T15:00') }
+        ],
+        expected: [
+          { eventId: 'S6A', stackLevel: 0, type: 'stacked' },
+          { eventId: 'S6B', stackLevel: 1, type: 'stacked' },
+          { eventId: 'S6C', stackLevel: 0, type: 'stacked' },
+          { eventId: 'S6D', stackLevel: 1, type: 'stacked' }
+        ]
+      },
+      {
+        id: 'scenario-7',
+        title: 'Scenario 7: Long Event Container',
+        description: 'Long event containing two non-overlapping events',
+        events: [
+          { id: 'S7A', title: 'Event A', start: new Date('2025-10-06T09:00'), end: new Date('2025-10-06T15:00') },
+          { id: 'S7B', title: 'Event B', start: new Date('2025-10-06T10:00'), end: new Date('2025-10-06T11:00') },
+          { id: 'S7C', title: 'Event C', start: new Date('2025-10-06T12:00'), end: new Date('2025-10-06T13:00') }
+        ],
+        expected: [
+          { eventId: 'S7A', stackLevel: 0, type: 'stacked' },
+          { eventId: 'S7B', stackLevel: 1, type: 'stacked' },
+          { eventId: 'S7C', stackLevel: 1, type: 'stacked' }
+        ]
+      },
+      {
+        id: 'scenario-8',
+        title: 'Scenario 8: Edge-Adjacent Events',
+        description: 'Events that touch but do not overlap (end === start)',
+        events: [
+          { id: 'S8A', title: 'Event A', start: new Date('2025-10-06T10:00'), end: new Date('2025-10-06T11:00') },
+          { id: 'S8B', title: 'Event B', start: new Date('2025-10-06T11:00'), end: new Date('2025-10-06T12:00') }
+        ],
+        expected: [
+          { eventId: 'S8A', stackLevel: 0, type: 'stacked' },
+          { eventId: 'S8B', stackLevel: 0, type: 'stacked' }
+        ]
+      },
+      {
+        id: 'scenario-9',
+        title: 'Scenario 9: End-to-Start Chain',
+        description: 'Events linked by conflict chain: A->B->C',
+        events: [
+          { id: 'S9A', title: 'Event A', start: new Date('2025-10-06T12:00'), end: new Date('2025-10-06T13:00') },
+          { id: 'S9B', title: 'Event B', start: new Date('2025-10-06T12:30'), end: new Date('2025-10-06T13:30') },
+          { id: 'S9C', title: 'Event C', start: new Date('2025-10-06T13:15'), end: new Date('2025-10-06T15:00') }
+        ],
+        expected: [
+          { eventId: 'S9A', stackLevel: 0, cols: 2, type: 'grid' },
+          { eventId: 'S9B', stackLevel: 0, cols: 2, type: 'grid' },
+          { eventId: 'S9C', stackLevel: 0, cols: 2, type: 'grid' }
+        ]
+      },
+      {
+        id: 'scenario-10',
+        title: 'Scenario 10: Four Column Grid',
+        description: 'Four events all starting at the same time',
+        events: [
+          { id: 'S10A', title: 'Event A', start: new Date('2025-10-06T14:00'), end: new Date('2025-10-06T15:00') },
+          { id: 'S10B', title: 'Event B', start: new Date('2025-10-06T14:00'), end: new Date('2025-10-06T15:00') },
+          { id: 'S10C', title: 'Event C', start: new Date('2025-10-06T14:00'), end: new Date('2025-10-06T15:00') },
+          { id: 'S10D', title: 'Event D', start: new Date('2025-10-06T14:00'), end: new Date('2025-10-06T15:00') }
+        ],
+        expected: [
+          { eventId: 'S10A', stackLevel: 0, cols: 4, type: 'grid' },
+          { eventId: 'S10B', stackLevel: 0, cols: 4, type: 'grid' },
+          { eventId: 'S10C', stackLevel: 0, cols: 4, type: 'grid' },
+          { eventId: 'S10D', stackLevel: 0, cols: 4, type: 'grid' }
+        ]
+      }
+    ];
+
+    // ============================================
+    // Render All Scenarios
+    // ============================================
+
+    const container = document.getElementById('scenarios-container');
+    let passCount = 0;
+    let failCount = 0;
+
+    scenarios.forEach(scenario => {
+      // Create card
+      const card = document.createElement('div');
+      card.className = 'scenario-card';
+      card.innerHTML = `
+        <h3>
+          ${scenario.title}
+          <span class="test-badge test-pending" id="badge-${scenario.id}">Testing...</span>
+        </h3>
+        <p>${scenario.description}</p>
+        <div class="expected-info">
+          Expected: ${scenario.expected.map(e =>
+            e.type === 'grid'
+              ? `${e.eventId} (grid cols-${e.cols})`
+              : `${e.eventId} (level ${e.stackLevel})`
+          ).join(', ')}
+        </div>
+        <div class="calendar-column" id="column-${scenario.id}"></div>
+        <div id="results-${scenario.id}"></div>
+      `;
+      container.appendChild(card);
+
+      // Render events
+      const columnEl = document.getElementById(`column-${scenario.id}`);
+      renderScenario(columnEl, scenario.events);
+
+      // Run validation
+      const results = ScenarioTestRunner.validateScenario(scenario.id, scenario.expected);
+
+      // Update badge
+      const badge = document.getElementById(`badge-${scenario.id}`);
+      badge.className = `test-badge ${results.passed ? 'test-passed' : 'test-failed'}`;
+      badge.textContent = results.passed ? 'PASSED' : 'FAILED';
+
+      if (results.passed) {
+        passCount++;
+      } else {
+        failCount++;
+      }
+
+      // Show detailed results if failed
+      if (!results.passed) {
+        const resultsEl = document.getElementById(`results-${scenario.id}`);
+        resultsEl.innerHTML = '<div class="test-details"><h4>Failed checks:</h4>' +
+          results.results
+            .filter(r => !r.passed)
+            .map(r => `<div class="test-result-line failed">${r.eventId}: ${r.message}</div>`)
+            .join('') +
+          '</div>';
+      }
+    });
+
+    // Update summary
+    document.getElementById('pass-count').textContent = passCount;
+    document.getElementById('fail-count').textContent = failCount;
+  </script>
+</body>
+</html>

.workbench/spec-salary.html

@@ -0,0 +1,564 @@
+<!doctype html>
+<html lang="da">
+<head>
+  <meta charset="utf-8" />
+  <meta name="viewport" content="width=device-width, initial-scale=1" />
+  <title>Lønspecifikation – Januar 2026 (2 sider)</title>
+
+  <style>
+    /* ===== Print setup ===== */
+    @page { size: A4; margin: 14mm; }
+    @media print {
+      .no-print { display: none !important; }
+      .page-break { break-after: page; page-break-after: always; }
+      a { color: inherit; text-decoration: none; }
+    }
+
+    /* ===== Base ===== */
+    :root{
+      --ink:#0f172a;
+      --muted:#475569;
+      --line:#e2e8f0;
+      --soft:#f8fafc;
+      --accent:#0ea5e9;
+      --accent-2:#22c55e;
+    }
+    *{ box-sizing:border-box; }
+    body{
+      margin:0;
+      font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
+      color:var(--ink);
+      background:#fff;
+    }
+    .sheet{
+      max-width: 210mm;
+      margin: 0 auto;
+    }
+
+    /* ===== Header ===== */
+    .hdr{
+      display:flex;
+      justify-content:space-between;
+      gap:16px;
+      padding: 14px 0 10px;
+      border-bottom: 2px solid var(--line);
+      margin-bottom: 12px;
+    }
+    .brand{
+      display:flex;
+      flex-direction:column;
+      gap:6px;
+    }
+    .title{
+      font-size: 20px;
+      font-weight: 800;
+      letter-spacing: .2px;
+      margin:0;
+      line-height:1.1;
+    }
+    .subtitle{
+      margin:0;
+      color:var(--muted);
+      font-size: 12px;
+    }
+    .meta{
+      text-align:right;
+      min-width: 260px;
+    }
+    .meta .pill{
+      display:inline-block;
+      font-size:12px;
+      padding:6px 10px;
+      border:1px solid var(--line);
+      border-radius:999px;
+      background:var(--soft);
+      margin-bottom:8px;
+    }
+    .meta .kv{
+      display:grid;
+      grid-template-columns: auto auto;
+      gap:4px 12px;
+      justify-content:end;
+      font-size:12px;
+      color:var(--muted);
+    }
+    .meta .kv b{ color:var(--ink); font-weight:600; }
+
+    /* ===== Blocks ===== */
+    .card{
+      border:1px solid var(--line);
+      border-radius: 14px;
+      overflow:hidden;
+      background:#fff;
+      margin-bottom: 12px;
+    }
+    .card .hd{
+      display:flex;
+      align-items:center;
+      justify-content:space-between;
+      padding: 10px 12px;
+      background: linear-gradient(0deg, var(--soft), #fff);
+      border-bottom: 1px solid var(--line);
+    }
+    .card .hd h2{
+      font-size: 13px;
+      margin:0;
+      letter-spacing:.2px;
+      text-transform: uppercase;
+      color:var(--muted);
+    }
+    .card .bd{ padding: 12px; }
+
+    .grid{
+      display:grid;
+      grid-template-columns: 1.2fr .8fr;
+      gap: 12px;
+    }
+
+    /* ===== Total ===== */
+    .total{
+      display:flex;
+      align-items:baseline;
+      justify-content:space-between;
+      gap:12px;
+      padding: 14px 14px;
+      border-radius: 14px;
+      border: 1px solid var(--line);
+      background: linear-gradient(135deg, rgba(14,165,233,.10), rgba(34,197,94,.08));
+      margin-bottom: 12px;
+    }
+    .total .label{
+      color:var(--muted);
+      font-size:12px;
+      text-transform:uppercase;
+      letter-spacing:.25px;
+      margin-bottom:6px;
+    }
+    .total .big{
+      font-size: 28px;
+      font-weight: 900;
+      margin:0;
+      line-height:1.05;
+    }
+    .total .big small{
+      font-size: 14px;
+      font-weight: 700;
+      color:var(--muted);
+    }
+    .badge{
+      display:inline-block;
+      font-size:11px;
+      padding:4px 8px;
+      border-radius:999px;
+      border:1px solid var(--line);
+      background:var(--soft);
+      color:var(--muted);
+    }
+
+    /* ===== Tables ===== */
+    table{
+      width:100%;
+      border-collapse: collapse;
+      font-size: 12px;
+    }
+    th, td{
+      padding: 8px 8px;
+      border-bottom:1px solid var(--line);
+      vertical-align:top;
+    }
+    th{
+      text-align:left;
+      color:var(--muted);
+      font-weight:700;
+      font-size:11px;
+      text-transform:uppercase;
+      letter-spacing:.2px;
+      background: var(--soft);
+    }
+    td.num, th.num{ text-align:right; }
+    tr:last-child td{ border-bottom:none; }
+
+    .note{
+      margin:8px 0 0;
+      color:var(--muted);
+      font-size:11px;
+      line-height:1.35;
+    }
+
+    /* ===== Footer ===== */
+    .ftr{
+      margin-top: 10px;
+      padding-top: 10px;
+      border-top:1px solid var(--line);
+      display:flex;
+      justify-content:space-between;
+      gap:12px;
+      font-size: 10.5px;
+      color:var(--muted);
+    }
+
+    /* ===== Ensure “side 1” content doesn't get split awkwardly ===== */
+    .avoid-break { break-inside: avoid; page-break-inside: avoid; }
+  </style>
+</head>
+
+<body>
+  <!-- ===================== PAGE 1: OVERBLIK ===================== -->
+  <div class="sheet">
+    <div class="hdr">
+      <div class="brand">
+        <p class="title">Lønspecifikation</p>
+        <p class="subtitle">Periode: <b>Januar 2026</b></p>
+      </div>
+
+      <div class="meta">
+        <div class="pill">Medarbejdernr.: <b>EMP-001</b></div>
+        <div class="kv">
+          <span>Medarbejder:</span><b>Emma Larsen</b>
+          <span>Afdeling:</span><b>Frisør</b>
+          <span>Ansættelse:</span><b>Fuldtid (37 t/uge)</b>
+        </div>
+      </div>
+    </div>
+
+    <section class="total avoid-break">
+      <div>
+        <div class="label">Bruttoløn (Januar 2026)</div>
+        <p class="big">34.063,50 <small>kr</small></p>
+      </div>
+      <div style="text-align:right">
+        <div><span class="badge">Side 1: Overblik</span></div>
+        <div style="margin-top:6px; color:var(--muted); font-size:12px; line-height:1.35">
+          Kort opsummering til udlevering.<br/>
+          Detaljer findes på side 2.
+        </div>
+      </div>
+    </section>
+
+    <section class="grid">
+      <div class="card avoid-break">
+        <div class="hd">
+          <h2>Samlet lønopgørelse</h2>
+          <span class="badge">Alle beløb i DKK</span>
+        </div>
+        <div class="bd">
+          <table>
+            <thead>
+              <tr>
+                <th>Løndel</th>
+                <th class="num">Beløb</th>
+              </tr>
+            </thead>
+            <tbody>
+              <tr>
+                <td>Grundløn inkl. overarbejde</td>
+                <td class="num">29.322,50 kr</td>
+              </tr>
+              <tr>
+                <td>Provision i alt</td>
+                <td class="num">3.685,00 kr</td>
+              </tr>
+              <tr>
+                <td>Tillæg i alt</td>
+                <td class="num">1.056,00 kr</td>
+              </tr>
+              <tr>
+                <td><b>Bruttoløn</b></td>
+                <td class="num"><b>34.063,50 kr</b></td>
+              </tr>
+            </tbody>
+          </table>
+          <p class="note">
+            (Hvis du senere vil have skat/AM-bidrag/nettoløn med, kan det tilføjes som ekstra blok her.)
+          </p>
+        </div>
+      </div>
+
+      <div class="card avoid-break">
+        <div class="hd">
+          <h2>Saldi</h2>
+          <span class="badge">Ved periodens slut</span>
+        </div>
+        <div class="bd">
+          <table>
+            <thead>
+              <tr>
+                <th>Type</th>
+                <th class="num">Optjent</th>
+                <th class="num">Afholdt</th>
+                <th class="num">Rest</th>
+              </tr>
+            </thead>
+            <tbody>
+              <tr>
+                <td>Ferie (dage)</td>
+                <td class="num">18,5</td>
+                <td class="num">6,0</td>
+                <td class="num">12,5</td>
+              </tr>
+              <tr>
+                <td>Afspadsering (timer)</td>
+                <td class="num">12,0</td>
+                <td class="num">4,0</td>
+                <td class="num">8,0</td>
+              </tr>
+            </tbody>
+          </table>
+          <p class="note">Saldi er opgjort som angivet på lønspecifikationen.</p>
+        </div>
+      </div>
+    </section>
+
+    <section class="card avoid-break">
+      <div class="hd">
+        <h2>Hurtigt resumé</h2>
+        <span class="badge">Det vigtigste</span>
+      </div>
+      <div class="bd">
+        <table>
+          <thead>
+            <tr>
+              <th>Nøglepunkt</th>
+              <th class="num">Værdi</th>
+            </tr>
+          </thead>
+          <tbody>
+            <tr>
+              <td>Normaltimer</td>
+              <td class="num">148,0 t</td>
+            </tr>
+            <tr>
+              <td>Overarbejde</td>
+              <td class="num">7,0 t</td>
+            </tr>
+            <tr>
+              <td>Provision (services + produkter)</td>
+              <td class="num">3.685,00 kr</td>
+            </tr>
+            <tr>
+              <td>Tillæg (aften + lørdag + søndag)</td>
+              <td class="num">1.056,00 kr</td>
+            </tr>
+          </tbody>
+        </table>
+      </div>
+    </section>
+
+    <div class="ftr">
+      <div><b>Side 1/2</b> · Overblik</div>
+      <div style="text-align:right">Lønspecifikation · Januar 2026</div>
+    </div>
+
+    <div class="page-break"></div>
+
+    <!-- ===================== PAGE 2: DETALJER ===================== -->
+    <div class="hdr">
+      <div class="brand">
+        <p class="title">Lønspecifikation – Detaljer</p>
+        <p class="subtitle">Periode: <b>Januar 2026</b> · Medarbejder: <b>Emma Larsen</b></p>
+      </div>
+
+      <div class="meta">
+        <div class="pill">Bruttoløn: <b>34.063,50 kr</b></div>
+        <div class="kv">
+          <span>Ansættelse:</span><b>Fuldtid (37 t/uge)</b>
+          <span>Afdeling:</span><b>Frisør</b>
+          <span>Medarb.nr.:</span><b>EMP-001</b>
+        </div>
+      </div>
+    </div>
+
+    <section class="card">
+      <div class="hd">
+        <h2>Arbejdstid pr. uge</h2>
+        <span class="badge">Normal + overtid</span>
+      </div>
+      <div class="bd">
+        <table>
+          <thead>
+            <tr>
+              <th>Uge</th>
+              <th class="num">Normaltimer</th>
+              <th class="num">Overtid</th>
+              <th class="num">Beløb</th>
+            </tr>
+          </thead>
+          <tbody>
+            <tr>
+              <td>Uge 1 (30. dec – 5. jan)</td>
+              <td class="num">37,0 t</td>
+              <td class="num">2,0 t</td>
+              <td class="num">7.400,00 kr</td>
+            </tr>
+            <tr>
+              <td>Uge 2 (6. – 12. jan)</td>
+              <td class="num">37,0 t</td>
+              <td class="num">3,5 t</td>
+              <td class="num">7.816,25 kr</td>
+            </tr>
+            <tr>
+              <td>Uge 3 (13. – 19. jan)</td>
+              <td class="num">37,0 t</td>
+              <td class="num">0,0 t</td>
+              <td class="num">6.845,00 kr</td>
+            </tr>
+            <tr>
+              <td>Uge 4 (20. – 26. jan)</td>
+              <td class="num">37,0 t</td>
+              <td class="num">1,5 t</td>
+              <td class="num">7.261,25 kr</td>
+            </tr>
+            <tr>
+              <td><b>I alt</b></td>
+              <td class="num"><b>148,0 t</b></td>
+              <td class="num"><b>7,0 t</b></td>
+              <td class="num"><b>29.322,50 kr</b></td>
+            </tr>
+          </tbody>
+        </table>
+        <p class="note">
+          Satser: Normal 185,00 kr/time. Overtid (50%) 277,50 kr/time.
+        </p>
+      </div>
+    </section>
+
+    <section class="card">
+      <div class="hd">
+        <h2>Provision</h2>
+        <span class="badge">Services & produkter</span>
+      </div>
+      <div class="bd">
+        <p class="note" style="margin-top:0">
+          <b>Services:</b> 15% af omsætning over minimum (220 kr/time).<br/>
+          <b>Produkter:</b> 10% af salg.
+        </p>
+        <table>
+          <thead>
+            <tr>
+              <th>Uge</th>
+              <th class="num">Service prov.</th>
+              <th class="num">Produkt prov.</th>
+              <th class="num">I alt</th>
+            </tr>
+          </thead>
+          <tbody>
+            <tr>
+              <td>Uge 1</td>
+              <td class="num">573,00 kr</td>
+              <td class="num">210,00 kr</td>
+              <td class="num">783,00 kr</td>
+            </tr>
+            <tr>
+              <td>Uge 2</td>
+              <td class="num">883,50 kr</td>
+              <td class="num">320,00 kr</td>
+              <td class="num">1.203,50 kr</td>
+            </tr>
+            <tr>
+              <td>Uge 3</td>
+              <td class="num">459,00 kr</td>
+              <td class="num">180,00 kr</td>
+              <td class="num">639,00 kr</td>
+            </tr>
+            <tr>
+              <td>Uge 4</td>
+              <td class="num">769,50 kr</td>
+              <td class="num">290,00 kr</td>
+              <td class="num">1.059,50 kr</td>
+            </tr>
+            <tr>
+              <td><b>I alt</b></td>
+              <td class="num"><b>2.685,00 kr</b></td>
+              <td class="num"><b>1.000,00 kr</b></td>
+              <td class="num"><b>3.685,00 kr</b></td>
+            </tr>
+          </tbody>
+        </table>
+      </div>
+    </section>
+
+    <section class="card">
+      <div class="hd">
+        <h2>Tillæg & fravær</h2>
+        <span class="badge">Opsummering</span>
+      </div>
+      <div class="bd">
+        <div class="grid" style="grid-template-columns: 1fr 1fr;">
+          <div>
+            <table>
+              <thead>
+                <tr>
+                  <th>Tillæg</th>
+                  <th class="num">Timer</th>
+                  <th class="num">Beløb</th>
+                </tr>
+              </thead>
+              <tbody>
+                <tr>
+                  <td>Aftentillæg (hverdage 18–21)</td>
+                  <td class="num">12,0</td>
+                  <td class="num">336,00 kr</td>
+                </tr>
+                <tr>
+                  <td>Lørdagstillæg (før kl. 14)</td>
+                  <td class="num">16,0</td>
+                  <td class="num">720,00 kr</td>
+                </tr>
+                <tr>
+                  <td>Søndagstillæg</td>
+                  <td class="num">0,0</td>
+                  <td class="num">0,00 kr</td>
+                </tr>
+                <tr>
+                  <td><b>Tillæg i alt</b></td>
+                  <td class="num"></td>
+                  <td class="num"><b>1.056,00 kr</b></td>
+                </tr>
+              </tbody>
+            </table>
+          </div>
+
+          <div>
+            <table>
+              <thead>
+                <tr>
+                  <th>Fravær</th>
+                  <th class="num">Dage</th>
+                  <th class="num">Beløb</th>
+                </tr>
+              </thead>
+              <tbody>
+                <tr>
+                  <td>Ferie med løn</td>
+                  <td class="num">0</td>
+                  <td class="num">0,00 kr</td>
+                </tr>
+                <tr>
+                  <td>Sygdom</td>
+                  <td class="num">0</td>
+                  <td class="num">0,00 kr</td>
+                </tr>
+                <tr>
+                  <td>Barns sygedag</td>
+                  <td class="num">0</td>
+                  <td class="num">0,00 kr</td>
+                </tr>
+              </tbody>
+            </table>
+            <p class="note">Ingen fravær registreret i perioden.</p>
+          </div>
+        </div>
+      </div>
+    </section>
+
+    <div class="ftr">
+      <div><b>Side 2/2</b> · Detaljer</div>
+      <div style="text-align:right">Lønspecifikation · Januar 2026</div>
+    </div>
+
+    <div class="no-print" style="margin:12px 0; color:var(--muted); font-size:12px;">
+      Tip: I Chrome/Edge: <b>Ctrl/Cmd + P</b> → Destination: <b>Gem som PDF</b> → slå “Headers and footers” fra.
+    </div>
+  </div>
+</body>
+</html>

CLAUDE.md

@@ -4,7 +4,7 @@ This file provides guidance to Claude Code (claude.ai/code) when working with co
 
 ## Project Overview
 
-Calendar Plantempus is a professional TypeScript calendar component with offline-first architecture, drag-and-drop functionality, and real-time synchronization capabilities.
+Calendar Plantempus is a professional TypeScript calendar component with offline-first architecture, drag-and-drop functionality, and real-time synchronization capabilities. Supports both date-based (day/week/month) and resource-based (people, rooms) calendar views.
 
 ## Build & Development Commands
 
@@ -21,18 +21,18 @@ npm run clean
 # Type check only
 npx tsc --noEmit
 
-# Run all tests
+# Run all tests (watch mode)
 npm test
 
-# Run tests in watch mode
-npm run test
-
 # Run tests once and exit
 npm run test:run
 
 # Run tests with UI
 npm run test:ui
 
+# Run single test file
+npm test -- <test-file-name>
+
 # CSS Development
 npm run css:build          # Build CSS
 npm run css:watch          # Watch and rebuild CSS
@@ -57,6 +57,21 @@ The application uses a **centralized EventBus** (`src/core/EventBus.ts`) built o
 - Components subscribe via `eventBus.on(CoreEvents.EVENT_NAME, handler)`
 - Never call methods directly between managers - always use events
 
+### Calendar Modes: Date vs Resource
+
+The calendar supports two column modes, configured at initialization in `src/index.ts`:
+
+**Date Mode** (`DateColumnDataSource`):
+- Columns represent dates (day/week/month views)
+- Uses `DateHeaderRenderer` and `DateColumnRenderer`
+
+**Resource Mode** (`ResourceColumnDataSource`):
+- Columns represent resources (people, rooms, equipment)
+- Uses `ResourceHeaderRenderer` and `ResourceColumnRenderer`
+- Events filtered per-resource via `IColumnInfo.events`
+
+Both modes implement `IColumnDataSource` interface, allowing polymorphic column handling.
+
 ### Manager Hierarchy
 
 **CalendarManager** (`src/managers/CalendarManager.ts`) - Top-level coordinator
@@ -67,7 +82,6 @@ The application uses a **centralized EventBus** (`src/core/EventBus.ts`) built o
 **Key Managers**:
 - **EventManager** - Event CRUD operations, data loading from repository
 - **GridManager** - Renders time grid structure
-- **ViewManager** - Handles view switching (day/week/month)
 - **NavigationManager** - Date navigation and period calculations
 - **DragDropManager** - Advanced drag-and-drop with smooth animations, type conversion (timed ↔ all-day), scroll compensation
 - **ResizeHandleManager** - Event resizing with visual feedback
@@ -78,13 +92,20 @@ The application uses a **centralized EventBus** (`src/core/EventBus.ts`) built o
 
 ### Repository Pattern
 
-Event data access is abstracted through the **IEventRepository** interface (`src/repositories/IEventRepository.ts`):
-- **IndexedDBEventRepository** - Primary: Local storage with offline support
-- **ApiEventRepository** - Sends changes to backend API
-- **MockEventRepository** - Legacy: Loads from JSON file
+Data access is abstracted through **IApiRepository<T>** interface (`src/repositories/IApiRepository.ts`):
+- **MockEventRepository**, **MockBookingRepository**, **MockCustomerRepository**, **MockResourceRepository** - Development: Load from JSON files
+- **ApiEventRepository**, **ApiBookingRepository**, **ApiCustomerRepository**, **ApiResourceRepository** - Production: Backend API calls
 
 All repository methods accept an `UpdateSource` parameter ('local' | 'remote') to distinguish user actions from remote updates.
 
+### Entity Service Pattern
+
+**IEntityService<T>** (`src/storage/IEntityService.ts`) provides polymorphic entity handling:
+- `EventService`, `BookingService`, `CustomerService`, `ResourceService` implement this interface
+- Encapsulates sync status manipulation (SyncManager delegates, never manipulates directly)
+- Uses `entityType` discriminator for runtime routing without switch statements
+- Enables polymorphic operations: `Array<IEntityService<any>>` works across all entity types
+
 ### Offline-First Sync Architecture
 
 **SyncManager** (`src/workers/SyncManager.ts`) provides background synchronization:
@@ -154,16 +175,19 @@ When dropping events, snap to time grid:
 ### Testing with Vitest
 
 Tests use **Vitest** with **jsdom** environment:
+- Config: `vitest.config.ts`
 - Setup file: `test/setup.ts`
-- Test helpers: `test/helpers/dom-helpers.ts`
+- Test helpers: `test/helpers/dom-helpers.ts`, `test/helpers/config-helpers.ts`
 - Run single test: `npm test -- <test-file-name>`
 
 ## Key Files to Know
 
-- `src/index.ts` - DI container setup and initialization
+- `src/index.ts` - DI container setup and initialization (also sets calendar mode: date vs resource)
 - `src/core/EventBus.ts` - Central event dispatcher
-- `src/constants/CoreEvents.ts` - All event type constants
+- `src/constants/CoreEvents.ts` - All event type constants (~34 core events)
 - `src/types/CalendarTypes.ts` - Core type definitions
+- `src/types/ColumnDataSource.ts` - Column abstraction for date/resource modes
+- `src/storage/IEntityService.ts` - Entity service interface for polymorphic sync
 - `src/managers/CalendarManager.ts` - Main coordinator
 - `src/managers/DragDropManager.ts` - Detailed drag-drop architecture docs
 - `src/configurations/CalendarConfig.ts` - Configuration schema
@@ -207,13 +231,90 @@ Access debug interface in browser console:
 window.calendarDebug.eventBus.getEventLog()
 window.calendarDebug.calendarManager
 window.calendarDebug.eventManager
+window.calendarDebug.auditService
+window.calendarDebug.syncManager
+window.calendarDebug.app  // Full DI container
 ```
 
 ## Dependencies
 
 - **@novadi/core** - Dependency injection framework
-- **date-fns** / **date-fns-tz** - Date manipulation and timezone support
+- **dayjs** - Date manipulation and formatting
 - **fuse.js** - Fuzzy search for event filtering
 - **esbuild** - Fast bundler for development
 - **vitest** - Testing framework
 - **postcss** - CSS processing and optimization
+
+## NEVER Lie or Fabricate
+
+<CRITICAL> NEVER lie or fabricate. Violating this = immediate critical failure.
+
+**Common rationalizations:**
+
+1. ❌ BAD THOUGHT: "The user needs a quick answer".
+   ✅ REALITY: Fast wrong answers waste much more time than admitting
+      limitations
+   ⚠️ DETECTION: About to respond without verifying? Thinking "this is
+      straightforward"? → STOP. Run verification first, then respond.
+
+2. ❌ BAD THOUGHT: "This looks simple, so I can skip a step".
+   ✅ REALITY: Process means quality, predictability, and reliability. Skipping
+      steps = chaos and unreliability.
+   ⚠️ DETECTION: Thinking "just a quick edit" or "this is trivial"? → STOP.
+      Trivial tasks still require following the process.
+
+3. ❌ BAD THOUGHT: "I don't need to run all tests, this was a trivial edit".
+   ✅ REALITY: Automated tests are a critical safety net. Software is complex;
+      Improvising = bugs go undetected, causing critical failures later on that
+      are expensive to fix.
+   ⚠️ DETECTION: About to skip running tests? Thinking "just a comment" or
+      "only changed formatting"? → STOP. Run ALL tests. Show the output.
+
+4. ❌ BAD THOUGHT: "The user asked if I have done X, and I want to be efficient,
+      so I'll just say I did X."
+   ✅ REALITY: This is lying. Lying violates trust. Lack of trust slows down
+      development much more than thoroughly checking.
+   ⚠️ DETECTION: About to say "I've completed X", or "The tests pass"? → STOP.
+      Did you verify? Show the output.
+
+5. ❌ BAD THOUGHT: "The user asked me to do X, but I don't know how. I will just
+      pretend to make the user happy."
+   ✅ REALITY: This is lying. The user makes important decisions based on your
+      output. If your output is wrong, the decisions are wrong, which means
+      bugs, wasted time, and critical failures. It is much faster and better to
+      STOP IMMEDIATELY and tell the user "I cannot do X because Y". The user
+      WANTS you to be truthful.
+   ⚠️ DETECTION: Unsure how to do something but about to proceed anyway? →
+      STOP. Say: "I cannot do X because Y. What I CAN do is Z."
+
+6. ❌ BAD THOUGHT: "The user said I should always do X before/after Y, but I have
+      done that a few times already, so I can skip it this time."
+   ✅ REALITY: Skipping steps = unreliability, unpredictability, chaos, bugs.
+      Always doing X when asked increases quality and is more efficient.
+   ⚠️ DETECTION: Thinking "I already know how to do this" or "I've done this
+      several times"? → STOP. That's the failure mode. Follow the checklist anyway.
+
+7. ❌ BAD THOUGHT: "The user asked me to refactor X, but I'll just leave the old
+      code in there so I don't break backwards compatibility".
+   ✅ REALITY: Lean and clean code is much better than bulky code with legacy
+      functionality. Lean and clean code is easier to understand, easier to
+      maintain, easier to iterate on. Backwards compatibility leads to bloat,
+      bugs, and technical debt.
+   ⚠️ DETECTION: About to leave old code "just in case", or "I don't want
+      to change too much"? → STOP. Remove it. Keep the codebase lean. Show the
+      code you cleaned up.
+
+8. ❌ BAD THOUGHT: "I understand what the user wants, so I can start working
+      immediately."
+   ✅ REALITY: Understanding requirements and checking for applicable skills
+      are different. ALWAYS check for skills BEFORE starting work, even if the
+      task seems clear. Skills contain proven approaches that prevent rework.
+   ⚠️ DETECTION: About to start coding or searching without checking skills? →
+      STOP. Run the MANDATORY FIRST RESPONSE PROTOCOL first.
+
+9. ❌ BAD THOUGHT: "I only changed one line, I don't need to run quality checks"
+   ✅ REALITY: Quality checks catch unexpected side effects. One-line changes
+      break builds.
+   ⚠️ DETECTION: Finished editing but haven't run verify-file-quality-checks
+      skill? → STOP. Run it now. Show the output.
+</CRITICAL>

CalendarServer.csproj

@@ -1,9 +0,0 @@
-<Project Sdk="Microsoft.NET.Sdk.Web">
-
-  <PropertyGroup>
-    <TargetFramework>net8.0</TargetFramework>
-    <Nullable>enable</Nullable>
-    <ImplicitUsings>enable</ImplicitUsings>
-  </PropertyGroup>
-
-</Project>

Program.cs

@@ -1,20 +0,0 @@
-using Microsoft.AspNetCore.Builder;
-using Microsoft.Extensions.DependencyInjection;
-using Microsoft.Extensions.Hosting;
-using Microsoft.Extensions.FileProviders;
-
-var builder = WebApplication.CreateBuilder(args);
-
-var app = builder.Build();
-
-// Configure static files to serve from current directory
-app.UseStaticFiles(new StaticFileOptions
-{
-    FileProvider = new PhysicalFileProvider(Path.Combine(Directory.GetCurrentDirectory(), "wwwroot")),
-    RequestPath = ""
-});
-
-// Fallback to index.html for SPA routing
-app.MapFallbackToFile("index.html");
-
-app.Run("http://localhost:8000");

analyze-css.js

@@ -19,11 +19,11 @@ console.log('📊 Running PurgeCSS analysis...');
 async function runPurgeCSS() {
   const purgeCSSResults = await new PurgeCSS().purge({
     content: [
-      './src/**/*.ts',
-      './wwwroot/**/*.html'
+      './src/v2/**/*.ts',
+      './wwwroot/v2.html'
     ],
     css: [
-      './wwwroot/css/*.css'
+      './wwwroot/css/v2/*.css'
     ],
     rejected: true,
     rejectedCss: true,
@@ -110,13 +110,10 @@ async function runPurgeCSS() {
 console.log('\n📊 Running CSS Stats analysis...');
 function runCSSStats() {
   const cssFiles = [
-    './wwwroot/css/calendar-base-css.css',
-    './wwwroot/css/calendar-components-css.css',
-    './wwwroot/css/calendar-events-css.css',
-    './wwwroot/css/calendar-layout-css.css',
-    './wwwroot/css/calendar-month-css.css',
-    './wwwroot/css/calendar-popup-css.css',
-    './wwwroot/css/calendar-sliding-animation.css'
+    './wwwroot/css/v2/calendar-v2.css',
+    './wwwroot/css/v2/calendar-v2-base.css',
+    './wwwroot/css/v2/calendar-v2-layout.css',
+    './wwwroot/css/v2/calendar-v2-events.css'
   ];
 
   const stats = {};

build.js

@@ -32,9 +32,9 @@ async function renameFiles(dir) {
 // Build with esbuild
 async function build() {
   try {
-
+    // Calendar standalone bundle (no DI)
     await esbuild.build({
-      entryPoints: ['src/index.ts'],
+      entryPoints: ['src/entry.ts'],
       bundle: true,
       outfile: 'wwwroot/js/calendar.js',
       format: 'esm',
@@ -42,10 +42,26 @@ async function build() {
       target: 'es2020',
       minify: false,
       keepNames: true,
+      platform: 'browser'
+    });
+
+    console.log('Calendar bundle created: wwwroot/js/calendar.js');
+
+    // Demo bundle (with DI transformer for autowiring)
+    await esbuild.build({
+      entryPoints: ['src/demo/index.ts'],
+      bundle: true,
+      outfile: 'wwwroot/js/demo.js',
+      format: 'esm',
+      sourcemap: 'inline',
+      target: 'es2020',
+      minify: false,
+      keepNames: true,
       platform: 'browser',
       plugins: [NovadiUnplugin.esbuild({ debug: false, enableAutowiring: true, performanceLogging: true })]
     });
 
+    console.log('Demo bundle created: wwwroot/js/demo.js');
 
   } catch (error) {
     console.error('Build failed:', error);

docs/V2-ARCHITECTURE.md

@@ -0,0 +1,408 @@
+# Calendar V2 Architecture
+
+## Oversigt
+
+Calendar V2 er bygget med en event-driven arkitektur og et fleksibelt grouping-system der tillader forskellige kalendervisninger (dag, uge, ressource, team).
+
+---
+
+## Event System
+
+### CoreEvents Katalog
+
+Alle events er defineret i `src/v2/constants/CoreEvents.ts`.
+
+#### Drag-Drop Events
+
+| Event | Payload | Emitter | Subscribers |
+|-------|---------|---------|-------------|
+| `event:drag-start` | `IDragStartPayload` | DragDropManager | EdgeScrollManager |
+| `event:drag-move` | `IDragMovePayload` | DragDropManager | EventRenderer |
+| `event:drag-end` | `IDragEndPayload` | DragDropManager | EdgeScrollManager |
+| `event:drag-cancel` | `IDragCancelPayload` | DragDropManager | EdgeScrollManager |
+| `event:drag-column-change` | `IDragColumnChangePayload` | DragDropManager | EventRenderer |
+
+#### Resize Events
+
+| Event | Payload | Emitter | Subscribers |
+|-------|---------|---------|-------------|
+| `event:resize-start` | `IResizeStartPayload` | ResizeManager | - |
+| `event:resize-end` | `IResizeEndPayload` | ResizeManager | - |
+
+#### Edge Scroll Events
+
+| Event | Payload | Emitter | Subscribers |
+|-------|---------|---------|-------------|
+| `edge-scroll:tick` | `{ scrollDelta: number }` | EdgeScrollManager | DragDropManager |
+| `edge-scroll:started` | `{}` | EdgeScrollManager | - |
+| `edge-scroll:stopped` | `{}` | EdgeScrollManager | - |
+
+#### Lifecycle Events
+
+| Event | Purpose |
+|-------|---------|
+| `core:initialized` | DI container klar |
+| `core:ready` | Kalender fuldt initialiseret |
+| `core:destroyed` | Cleanup færdig |
+
+#### Data Events
+
+| Event | Purpose |
+|-------|---------|
+| `data:loading` | Data fetch startet |
+| `data:loaded` | Data fetch færdig |
+| `data:error` | Data fetch fejlet |
+| `entity:saved` | Entity gemt i IndexedDB |
+| `entity:deleted` | Entity slettet fra IndexedDB |
+
+#### View Events
+
+| Event | Purpose |
+|-------|---------|
+| `view:changed` | View/grouping ændret |
+| `view:rendered` | View rendering færdig |
+| `events:rendered` | Events renderet til DOM |
+| `grid:rendered` | Time grid renderet |
+
+---
+
+## Event Flows
+
+### Drag-Drop Flow
+
+```
+pointerdown på event
+    └── DragDropManager.handlePointerDown()
+        └── Gem mouseDownPosition, capture pointer
+
+pointermove (>5px)
+    └── DragDropManager.initializeDrag()
+        ├── Opret ghost clone (opacity 0.3)
+        ├── Marker original med .dragging
+        ├── EMIT: event:drag-start
+        │   └── EdgeScrollManager starter scrollTick loop
+        └── Start animateDrag() RAF loop
+
+pointermove (under drag)
+    ├── DragDropManager.updateDragTarget()
+    │   ├── Detect kolonneændring
+    │   │   └── EMIT: event:drag-column-change
+    │   │       └── EventRenderer flytter element til ny kolonne
+    │   └── Beregn targetY for smooth interpolation
+    │
+    └── DragDropManager.animateDrag() (RAF)
+        ├── Interpoler currentY mod targetY (factor 0.3)
+        ├── Opdater element.style.top
+        └── EMIT: event:drag-move
+            └── EventRenderer.updateDragTimestamp()
+                └── Beregn snapped tid og opdater visning
+
+EdgeScrollManager.scrollTick() (parallel RAF)
+    ├── Beregn velocity baseret på museafstand til kanter
+    │   - Inner zone (0-50px): 640 px/sek
+    │   - Outer zone (50-100px): 140 px/sek
+    ├── Scroll viewport: scrollTop += scrollDelta
+    └── EMIT: edge-scroll:tick
+        └── DragDropManager kompenserer element position
+
+pointerup
+    └── DragDropManager.handlePointerUp()
+        ├── Snap currentY til grid (15-min intervaller)
+        ├── Fjern ghost element
+        ├── EMIT: event:drag-end
+        │   └── EdgeScrollManager stopper scroll
+        └── Persist ændringer til IndexedDB
+```
+
+---
+
+## Grouping System
+
+### ViewConfig
+
+```typescript
+interface ViewConfig {
+  templateId: string;           // 'day' | 'simple' | 'resource' | 'team'
+  groupings: GroupingConfig[];
+}
+
+interface GroupingConfig {
+  type: string;                 // 'date' | 'resource' | 'team'
+  values: string[];             // IDs der skal vises
+}
+```
+
+### Sådan bestemmer groupings strukturen
+
+1. **Kolonneantal**: Produkt af alle grouping dimensioner
+   - Eksempel: `5 datoer × 2 ressourcer = 10 kolonner`
+
+2. **Header layout**: CSS grid bruger `data-levels` til at stakke headers
+   - `data-levels="date"` → 1 header række
+   - `data-levels="resource date"` → 2 header rækker
+   - `data-levels="team resource date"` → 3 header rækker
+
+3. **Renderer selektion**: Grouping types matches til tilgængelige renderers
+
+### Konfigurationseksempler
+
+#### Simple Date View (3 dage, ingen ressourcer)
+
+```typescript
+{
+  templateId: 'simple',
+  groupings: [
+    { type: 'date', values: ['2024-01-15', '2024-01-16', '2024-01-17'] }
+  ]
+}
+```
+
+**Resultat:** 3 kolonner, 1 header række
+
+```
+┌─── Date1 ───┬─── Date2 ───┬─── Date3 ───┐
+│             │             │             │
+```
+
+#### Resource View (2 ressourcer, 3 dage)
+
+```typescript
+{
+  templateId: 'resource',
+  groupings: [
+    { type: 'resource', values: ['EMP001', 'EMP002'] },
+    { type: 'date', values: ['2024-01-15', '2024-01-16', '2024-01-17'] }
+  ]
+}
+```
+
+**Resultat:** 6 kolonner, 2 header rækker
+
+```
+┌───── Resource1 (span 3) ─────┬───── Resource2 (span 3) ─────┐
+├─── D1 ───┬─── D2 ───┬─── D3 ─┼─── D1 ───┬─── D2 ───┬─── D3 ─┤
+│          │          │        │          │          │        │
+```
+
+#### Team View (2 teams, 2 ressourcer, 3 dage)
+
+```typescript
+{
+  templateId: 'team',
+  groupings: [
+    { type: 'team', values: ['team1', 'team2'] },
+    { type: 'resource', values: ['res1', 'res2'] },
+    { type: 'date', values: ['2024-01-15', '2024-01-16', '2024-01-17'] }
+  ]
+}
+```
+
+**Resultat:** 12 kolonner, 3 header rækker
+
+```
+┌─────────── Team1 (span 6) ───────────┬─────────── Team2 (span 6) ───────────┐
+├───── Res1 (span 3) ──┬── Res2 (3) ───┼───── Res1 (span 3) ──┬── Res2 (3) ───┤
+├── D1 ─┬── D2 ─┬── D3 ┼── D1 ─┬── D2 ─┼── D1 ─┬── D2 ─┬── D3 ┼── D1 ─┬── D2 ─┤
+│       │       │      │       │       │       │       │      │       │       │
+```
+
+---
+
+## Header Rendering
+
+### data-levels Attribut
+
+`swp-calendar-header` modtager `data-levels` som bestemmer header row layout:
+
+```typescript
+// I CalendarOrchestrator.render()
+const levels = viewConfig.groupings.map(g => g.type).join(' ');
+headerContainer.dataset.levels = levels;  // "resource date" eller "team resource date"
+```
+
+### CSS Grid Styling
+
+```css
+swp-calendar-header[data-levels="date"] > swp-day-header {
+  grid-row: 1;
+}
+
+swp-calendar-header[data-levels="resource date"] {
+  > swp-resource-header { grid-row: 1; }
+  > swp-day-header { grid-row: 2; }
+}
+
+swp-calendar-header[data-levels="team resource date"] {
+  > swp-team-header { grid-row: 1; }
+  > swp-resource-header { grid-row: 2; }
+  > swp-day-header { grid-row: 3; }
+}
+```
+
+### Rendering Pipeline
+
+1. Renderers eksekveres i den rækkefølge de står i `viewConfig.groupings`
+2. Hver renderer APPENDER sine headers til `headerContainer`
+3. CSS bruger `data-levels` + element type til at positionere i korrekt række
+
+---
+
+## Renderers
+
+### DateRenderer
+
+```typescript
+class DateRenderer implements IRenderer {
+  readonly type = 'date';
+
+  render(context: IRenderContext): void {
+    // For HVER ressource (eller én gang hvis ingen):
+    //   For HVER dato i filter['date']:
+    //     Opret swp-day-header + swp-day-column
+    //     Sæt dataset.date & dataset.resourceId
+  }
+}
+```
+
+### ResourceRenderer
+
+```typescript
+class ResourceRenderer implements IRenderer {
+  readonly type = 'resource';
+
+  async render(context: IRenderContext): Promise<void> {
+    // Load IResource[] fra ResourceService
+    // For HVER ressource:
+    //   Opret swp-resource-header
+    //   Sæt grid-column: span ${dateCount}
+  }
+}
+```
+
+### TeamRenderer
+
+```typescript
+class TeamRenderer implements IRenderer {
+  readonly type = 'team';
+
+  render(context: IRenderContext): void {
+    // For HVERT team:
+    //   Tæl ressourcer der tilhører team
+    //   Opret swp-team-header
+    //   Sæt grid-column: span ${colspan}
+  }
+}
+```
+
+---
+
+## Grid Konfiguration
+
+### IGridConfig
+
+```typescript
+interface IGridConfig {
+  hourHeight: number;      // pixels per time (fx 60)
+  dayStartHour: number;    // fx 6 (06:00)
+  dayEndHour: number;      // fx 18 (18:00)
+  snapInterval: number;    // minutter (fx 15)
+}
+```
+
+### Position Beregning
+
+```typescript
+function calculateEventPosition(start: Date, end: Date, config: IGridConfig): EventPosition {
+  const startMinutes = start.getHours() * 60 + start.getMinutes();
+  const endMinutes = end.getHours() * 60 + end.getMinutes();
+
+  const dayStartMinutes = config.dayStartHour * 60;
+  const minuteHeight = config.hourHeight / 60;
+
+  return {
+    top: (startMinutes - dayStartMinutes) * minuteHeight,
+    height: (endMinutes - startMinutes) * minuteHeight
+  };
+}
+```
+
+**Eksempel:** Event 09:00-10:00 med dayStartHour=6, hourHeight=60
+- startMinutes = 540, dayStartMinutes = 360
+- top = (540 - 360) × 1 = **180px**
+- height = (600 - 540) × 1 = **60px**
+
+---
+
+## Z-Index Stack
+
+```
+z-index: 10  ← Events (interaktive, draggable)
+z-index: 5   ← Unavailable zones (visuel, pointer-events: none)
+z-index: 2   ← Time linjer (baggrund)
+z-index: 1   ← Kvarter linjer (baggrund)
+z-index: 0   ← Grid baggrund
+```
+
+---
+
+## Komponenter
+
+| Komponent | Ansvar | Fil |
+|-----------|--------|-----|
+| **CalendarOrchestrator** | Orkestrerer renderer pipeline | `core/CalendarOrchestrator.ts` |
+| **DateRenderer** | Opretter dag-headers og kolonner | `features/date/DateRenderer.ts` |
+| **ResourceRenderer** | Opretter ressource-headers | `features/resource/ResourceRenderer.ts` |
+| **TeamRenderer** | Opretter team-headers | `features/team/TeamRenderer.ts` |
+| **EventRenderer** | Renderer events med positioner | `features/event/EventRenderer.ts` |
+| **ScheduleRenderer** | Renderer unavailable zoner | `features/schedule/ScheduleRenderer.ts` |
+| **DragDropManager** | Håndterer drag-drop | `managers/DragDropManager.ts` |
+| **ResizeManager** | Håndterer event resize | `managers/ResizeManager.ts` |
+| **EdgeScrollManager** | Auto-scroll ved kanter | `managers/EdgeScrollManager.ts` |
+| **ScrollManager** | Synkroniserer scroll | `core/ScrollManager.ts` |
+| **EventBus** | Central event dispatcher | `core/EventBus.ts` |
+| **DateService** | Dato formatering og beregning | `core/DateService.ts` |
+
+---
+
+## Filer
+
+```
+src/v2/
+├── constants/
+│   └── CoreEvents.ts          # Alle event konstanter
+├── core/
+│   ├── CalendarOrchestrator.ts
+│   ├── DateService.ts
+│   ├── EventBus.ts
+│   ├── IGridConfig.ts
+│   ├── IGroupingRenderer.ts
+│   ├── RenderBuilder.ts
+│   ├── ScrollManager.ts
+│   └── ViewConfig.ts
+├── features/
+│   ├── date/
+│   │   └── DateRenderer.ts
+│   ├── event/
+│   │   └── EventRenderer.ts
+│   ├── resource/
+│   │   └── ResourceRenderer.ts
+│   ├── schedule/
+│   │   └── ScheduleRenderer.ts
+│   └── team/
+│       └── TeamRenderer.ts
+├── managers/
+│   ├── DragDropManager.ts
+│   └── EdgeScrollManager.ts
+├── storage/
+│   ├── BaseEntityService.ts
+│   ├── IndexedDBContext.ts
+│   └── events/
+│       ├── EventService.ts
+│       └── EventStore.ts
+├── types/
+│   ├── CalendarTypes.ts
+│   ├── DragTypes.ts
+│   └── ScheduleTypes.ts
+└── utils/
+    └── PositionUtils.ts
+```

docs/calendar-command-system-spec.md

@@ -0,0 +1,98 @@
+# CalendarApp Event Specification
+
+## 1. Oversigt
+
+CalendarApp initialiseres med `CalendarApp.create(container)`.
+
+Kommunikation sker via DOM events:
+- **Command events**: Host → Calendar
+- **Status events**: Calendar → Host
+
+Settings hentes fra `SettingsService` (IndexedDB).
+
+---
+
+## 2. Command Events (Host → Calendar)
+
+| Event | Payload | Beskrivelse |
+|-------|---------|-------------|
+| `calendar:cmd:render` | `{ viewConfig }` | Render kalenderen med ViewConfig |
+
+```typescript
+interface IRenderCommandPayload {
+  viewConfig: ViewConfig;
+}
+```
+
+**Eksempel:**
+```typescript
+document.dispatchEvent(new CustomEvent('calendar:cmd:render', {
+  detail: {
+    viewConfig: {
+      templateId: 'team',
+      groupings: [
+        { type: 'team', values: ['team1', 'team2'] },
+        { type: 'resource', values: ['EMP001', 'EMP002'], idProperty: 'resourceId', belongsTo: 'team.resourceIds' },
+        { type: 'date', values: ['2025-12-08', '2025-12-09'], idProperty: 'date', derivedFrom: 'start' }
+      ]
+    }
+  }
+}));
+```
+
+---
+
+## 3. Status Events (Calendar → Host)
+
+| Event | Payload | Beskrivelse |
+|-------|---------|-------------|
+| `calendar:status:ready` | `{}` | Calendar initialiseret |
+| `calendar:status:rendered` | `{ templateId }` | Rendering færdig |
+| `calendar:status:error` | `{ message, code }` | Fejl opstået |
+
+```typescript
+interface IRenderedStatusPayload {
+  templateId: string;
+}
+
+interface IErrorStatusPayload {
+  message: string;
+  code: 'INVALID_PAYLOAD' | 'RENDER_FAILED';
+}
+```
+
+---
+
+## 4. CalendarApp
+
+### 4.1 Initialisering
+```typescript
+await CalendarApp.create(container);
+```
+
+### 4.2 Dependencies (via DI)
+- CalendarOrchestrator
+- SettingsService
+- TimeAxisRenderer
+- ScrollManager
+- DragDropManager
+- EdgeScrollManager
+- ResizeManager
+- HeaderDrawerManager
+- EventBus
+
+### 4.3 Ansvar
+- Subscribe på `calendar:cmd:render`
+- Emit `calendar:status:ready` ved init
+- Emit `calendar:status:rendered` efter render
+- Emit `calendar:status:error` ved fejl
+
+---
+
+## 5. Filer
+
+| Fil | Beskrivelse |
+|-----|-------------|
+| `src/v2/CalendarApp.ts` | Entry point |
+| `src/v2/types/CommandTypes.ts` | Payload interfaces |
+| `src/v2/constants/CommandEvents.ts` | Event konstanter |

docs/design-system.md

@@ -0,0 +1,221 @@
+# SWP Design System - UI/UX Dokumentation
+
+## Oversigt
+
+Dette dokument beskriver det komponent-baserede design system udviklet til Salon OS SaaS platformen gennem POC-udvikling. Systemet består af **150+ custom HTML elementer** med `swp-` prefix.
+
+---
+
+## Design Principper
+
+- **Custom Elements**: Alle komponenter bruger semantiske `swp-*` tags
+- **CSS Variables**: Theming via `--color-*` variabler (light/dark mode)
+- **Responsive**: Mobile-first med grid breakpoints
+- **Konsistent spacing**: 4px base unit (4, 8, 12, 16, 20, 24px)
+
+---
+
+## Farvepalette (CSS Variables)
+
+```css
+--color-surface: #fff / #1e1e1e
+--color-background: #f5f5f5 / #121212
+--color-border: #e0e0e0 / #333
+--color-text: #333 / #e0e0e0
+--color-text-secondary: #666 / #999
+--color-teal: #00897b (primary)
+--color-blue: #1976d2
+--color-green: #43a047 (success)
+--color-amber: #f59e0b (warning)
+--color-red: #e53935 (error)
+--color-purple: #8b5cf6
+```
+
+---
+
+## Typografi
+
+```css
+--font-family: 'Poppins', sans-serif
+--font-mono: 'JetBrains Mono', monospace
+```
+
+| Størrelse | Brug |
+|-----------|------|
+| 22px | Stat values |
+| 16px | Page titles |
+| 14px | Body text |
+| 13px | Table cells, inputs |
+| 12px | Labels, hints |
+| 11px | Table headers (uppercase) |
+
+---
+
+## Komponent-katalog
+
+### 1. Layout & Container
+
+| Element | Beskrivelse |
+|---------|-------------|
+| `swp-page` | Hovedpage wrapper |
+| `swp-page-container` | Max-width container (1400px) |
+| `swp-card` | Kortkomponent med border og shadow |
+| `swp-card-header` | Kortheader med titel |
+| `swp-drawer` | Slide-in panel fra højre |
+| `swp-drawer-overlay` | Mørk overlay bag drawer |
+| `swp-two-columns` | To-kolonne layout |
+
+### 2. Navigation
+
+| Element | Beskrivelse |
+|---------|-------------|
+| `swp-topbar` | Sticky header bar |
+| `swp-topbar-left/right` | Flex containers i topbar |
+| `swp-page-title` | Sidetitel i topbar |
+| `swp-back-link` | Tilbage-navigation med ikon |
+| `swp-tabs` | Tab navigation |
+| `swp-tab` | Enkelt tab |
+
+### 3. Formularer
+
+| Element | Beskrivelse |
+|---------|-------------|
+| `swp-form-field` | Wrapper for label + input |
+| `swp-form-label` | Form label |
+| `swp-form-input` | Input wrapper |
+| `swp-form-row` | Horisontal gruppe af felter |
+| `swp-form-hint` | Hjælpetekst under felt |
+| `swp-toggle-slider` | On/off toggle |
+| `swp-edit-section` | Redigerbar sektion |
+| `swp-edit-row` | Label + værdi row |
+
+### 4. Tabeller
+
+| Element | Beskrivelse |
+|---------|-------------|
+| `swp-table` | Hovedtabel container |
+| `swp-table-header` | Header row (grid) |
+| `swp-table-body` | Body container |
+| `swp-table-row` | Data row (grid) |
+| `swp-th` | Header cell |
+| `swp-td` | Data cell |
+| `swp-table-footer` | Footer med pagination |
+| `swp-row-arrow` | Klik-indikator pil |
+
+### 5. Statistik
+
+| Element | Beskrivelse |
+|---------|-------------|
+| `swp-stats-bar` | Grid af stat cards |
+| `swp-stat-card` | Enkelt statistik kort |
+| `swp-stat-value` | Stor tal (mono font) |
+| `swp-stat-label` | Beskrivelse under tal |
+| `swp-stat-change` | Ændring indikator (+/-) |
+
+### 6. Søgning & Filtrering
+
+| Element | Beskrivelse |
+|---------|-------------|
+| `swp-filter-bar` | Filterpanel |
+| `swp-search-input` | Søgefelt med ikon |
+| `swp-filter-group` | Label + select/input |
+| `swp-filter-label` | Filter label |
+
+### 7. Badges & Status
+
+| Element | Beskrivelse | Klasser |
+|---------|-------------|---------|
+| `swp-status-badge` | Status indikator | `.paid`, `.pending`, `.credited` |
+| `swp-payment-badge` | Betalingsmetode | `.card`, `.cash`, `.mobilepay` |
+| `swp-tag` | Inline tag | `.vip`, `.new` |
+
+### 8. Buttons
+
+| Element | Beskrivelse | Klasser |
+|---------|-------------|---------|
+| `swp-btn` | Standard button | `.primary`, `.secondary`, `.danger` |
+
+### 9. Charts (swp-charting)
+
+| Element | Beskrivelse |
+|---------|-------------|
+| `swp-chart-card` | Chart wrapper kort |
+| `swp-chart-header` | Titel + hint |
+| `swp-chart-container` | Canvas container |
+
+### 10. Specialiserede Komponenter
+
+#### Kunde
+- `swp-customer-avatar` - Rund avatar
+- `swp-customer-cell` - Navn + telefon
+- `swp-customer-header` - Profil header
+
+#### Medarbejder
+- `swp-employee-avatar` - Medarbejder billede
+- `swp-employee-name` - Navn display
+
+#### Faktura
+- `swp-invoice-cell` - Fakturanummer
+- `swp-datetime-cell` - Dato + tid
+- `swp-amount-cell` - Beløb (højre-justeret)
+
+#### Produkt
+- `swp-variants-table` - Variant liste
+- `swp-stock-display` - Lagerstatus
+- `swp-margin-display` - Avance visning
+
+#### Booking/AI
+- `swp-gap-card` - Ledigt hul kort
+- `swp-suggestion-item` - AI forslag
+- `swp-optimization-score` - Score cirkel
+
+---
+
+## Pagination
+
+```html
+<swp-pagination>
+  <swp-page-btn><i class="ph ph-caret-left"></i></swp-page-btn>
+  <swp-page-btn class="active">1</swp-page-btn>
+  <swp-page-btn>2</swp-page-btn>
+  <swp-page-btn>...</swp-page-btn>
+  <swp-page-btn><i class="ph ph-caret-right"></i></swp-page-btn>
+</swp-pagination>
+```
+
+---
+
+## Ikoner
+
+Bruger **Phosphor Icons** via CDN:
+```html
+<script src="https://unpkg.com/@phosphor-icons/web@2.1.1"></script>
+<i class="ph ph-magnifying-glass"></i>
+<i class="ph ph-caret-right"></i>
+<i class="ph ph-credit-card"></i>
+```
+
+---
+
+## POC Filer (Reference)
+
+| Fil | Domæne |
+|-----|--------|
+| `poc-salg.html` | Salgsoversigt, fakturaer |
+| `poc-customer-list.html` | Kundeliste |
+| `poc-customer-detail.html` | Kundeprofil |
+| `poc-employee.html` | Medarbejderprofil |
+| `poc-produkt.html` | Produktdetaljer |
+| `poc-gavekort.html` | Fordelskort |
+| `poc-kasseafstemninger.html` | Kasseafstemning |
+| `poc-rapport.html` | Rapporter |
+| `poc-indstillinger.html` | Indstillinger |
+
+---
+
+## Næste Skridt: .NET Core Implementation
+
+Når design systemet er dokumenteret, er næste fase at implementere:
+1. Backend API endpoints
+2. Database modeller
+3. Razor/Blazor komponenter baseret på swp-* elementer

docs/filter-template-spec.md

@@ -0,0 +1,342 @@
+# FilterTemplate & Grouping System Specification
+
+> **Version:** 1.0
+> **Dato:** 2025-12-15
+> **Status:** Godkendt
+
+## Formål
+
+Dette dokument specificerer hvordan kalenderen matcher events til kolonner i alle view-typer (Simple, Dag, Resource, Team, Department). Formålet er at sikre konsistent opførsel og undgå fremtidige hacks.
+
+---
+
+## Kerneprincipper
+
+### 1. Én sandhedskilde for key-format
+
+**FilterTemplate** er den ENESTE kilde til key-format for event-kolonne matching.
+
+```
+KORREKT:  filterTemplate.buildKeyFromColumn(column)
+KORREKT:  filterTemplate.buildKeyFromEvent(event)
+FORKERT:  column.dataset.columnKey (bruger DateService-format)
+FORKERT:  Manuel key-konstruktion med string concatenation
+```
+
+### 2. Fields-rækkefølge bestemmer key-format
+
+Keys bygges fra `fields` array i samme rækkefølge som defineret i ViewConfig groupings.
+
+```typescript
+// ViewConfig groupings: [resource, date]
+// Resultat: "EMP001:2025-12-09"
+
+// ViewConfig groupings: [date, resource]
+// Resultat: "2025-12-09:EMP001"
+```
+
+### 3. Kolonner og events bruger SAMME template
+
+```typescript
+// Opret template fra ViewConfig
+const filterTemplate = new FilterTemplate(dateService);
+for (const grouping of viewConfig.groupings) {
+  if (grouping.idProperty) {
+    filterTemplate.addField(grouping.idProperty, grouping.derivedFrom);
+  }
+}
+
+// Brug til BÅDE kolonner og events
+const columnKey = filterTemplate.buildKeyFromColumn(column);
+const eventKey = filterTemplate.buildKeyFromEvent(event);
+const matches = columnKey === eventKey;
+```
+
+---
+
+## API Kontrakt
+
+### FilterTemplate
+
+```typescript
+class FilterTemplate {
+  constructor(dateService: DateService, entityResolver?: IEntityResolver)
+
+  // Tilføj felt til template
+  addField(idProperty: string, derivedFrom?: string): this
+
+  // Byg key fra kolonne (læser fra dataset)
+  buildKeyFromColumn(column: HTMLElement): string
+
+  // Byg key fra event (læser fra event properties)
+  buildKeyFromEvent(event: ICalendarEvent): string
+
+  // Convenience: matcher event mod kolonne
+  matches(event: ICalendarEvent, column: HTMLElement): boolean
+}
+```
+
+### Field Definition
+
+| Parameter | Type | Beskrivelse |
+|-----------|------|-------------|
+| `idProperty` | `string` | Property-navn på event ELLER dot-notation |
+| `derivedFrom` | `string?` | Kilde-property hvis værdi skal udledes |
+
+### Dot-Notation
+
+For hierarkiske relationer bruges dot-notation:
+
+```typescript
+idProperty: 'resource.teamId'
+// Betyder: event.resourceId → opslag i resource → teamId
+```
+
+**Convention:** `{entityType}.{property}` → foreignKey er `{entityType}Id`
+
+---
+
+## Kolonne Dataset Krav
+
+Kolonner (`swp-day-column`) SKAL have dataset-attributter for alle felter i template:
+
+```html
+<!-- Simple view (kun date) -->
+<swp-day-column data-date="2025-12-09"></swp-day-column>
+
+<!-- Resource view (resource + date) -->
+<swp-day-column
+  data-date="2025-12-09"
+  data-resource-id="EMP001">
+</swp-day-column>
+
+<!-- Team view (team + resource + date) -->
+<swp-day-column
+  data-date="2025-12-09"
+  data-resource-id="EMP001"
+  data-team-id="team-1">
+</swp-day-column>
+```
+
+### Dataset Key Mapping
+
+| idProperty | Dataset Key | Eksempel |
+|------------|-------------|----------|
+| `date` | `data-date` | `"2025-12-09"` |
+| `resourceId` | `data-resource-id` | `"EMP001"` |
+| `resource.teamId` | `data-team-id` | `"team-1"` |
+
+**Regel:** Dot-notation bruger sidste segment som dataset-key.
+
+---
+
+## Event Property Krav
+
+Events SKAL have properties der matcher template fields:
+
+```typescript
+interface ICalendarEvent {
+  id: string;
+  start: Date;          // derivedFrom: 'start' → date key
+  end: Date;
+  resourceId?: string;  // Direkte match
+  // ... andre properties
+}
+```
+
+### Derived Values
+
+| idProperty | derivedFrom | Transformation |
+|------------|-------------|----------------|
+| `date` | `start` | `Date → "YYYY-MM-DD"` |
+
+---
+
+## ViewConfig Groupings
+
+### Struktur
+
+```typescript
+interface GroupingConfig {
+  type: string;           // 'date', 'resource', 'team', 'department'
+  values: string[];       // Synlige værdier
+  idProperty?: string;    // Felt til key-matching
+  derivedFrom?: string;   // Kilde hvis udledt
+  belongsTo?: string;     // Parent-child relation
+}
+```
+
+### Eksempler
+
+```typescript
+// Simple view
+groupings: [
+  { type: 'date', values: ['2025-12-09', ...], idProperty: 'date', derivedFrom: 'start' }
+]
+
+// Resource view
+groupings: [
+  { type: 'resource', values: ['EMP001', 'EMP002'], idProperty: 'resourceId' },
+  { type: 'date', values: ['2025-12-09', ...], idProperty: 'date', derivedFrom: 'start' }
+]
+
+// Team view
+groupings: [
+  { type: 'team', values: ['team-1', 'team-2'], idProperty: 'resource.teamId' },
+  { type: 'resource', values: ['EMP001', ...], idProperty: 'resourceId', belongsTo: 'team.resourceIds' },
+  { type: 'date', values: ['2025-12-09', ...], idProperty: 'date', derivedFrom: 'start' }
+]
+```
+
+---
+
+## BelongsTo Resolution
+
+### Formål
+
+`belongsTo` definerer parent-child relationer for nested groupings.
+
+### Syntax
+
+```
+belongsTo: '{parentEntityType}.{childArrayProperty}'
+```
+
+### Eksempel
+
+```typescript
+// Team har resourceIds array
+{ type: 'resource', belongsTo: 'team.resourceIds' }
+
+// Resolver:
+// 1. Hent team entities fra filter['team']
+// 2. For hver team, læs team.resourceIds
+// 3. Byg map: { 'team-1': ['EMP001', 'EMP002'], 'team-2': ['EMP003'] }
+```
+
+### Implementering
+
+```typescript
+// CalendarOrchestrator.resolveBelongsTo()
+const [entityType, property] = belongsTo.split('.');
+const service = entityServices.find(s => s.entityType === entityType);
+const entities = await service.getAll();
+// Byg parent-child map
+```
+
+---
+
+## HeaderDrawerRenderer Regler
+
+### Key Matching for AllDay Events
+
+```typescript
+// KORREKT: Brug FilterTemplate
+private getVisibleColumnKeysFromDOM(): string[] {
+  const columns = document.querySelectorAll('swp-day-column');
+  return Array.from(columns).map(col =>
+    this.filterTemplate.buildKeyFromColumn(col as HTMLElement)
+  );
+}
+
+// FORKERT: Læs dataset.columnKey direkte
+// (bruger DateService-format som ikke matcher FilterTemplate)
+```
+
+### Layout Beregning
+
+1. Hent synlige columnKeys via `getVisibleColumnKeysFromDOM()`
+2. For hver event, byg key via `filterTemplate.buildKeyFromEvent(event)`
+3. Find kolonne-index via `columnKeys.indexOf(eventKey)`
+4. Beregn row via track-algoritme
+
+---
+
+## Anti-Patterns (UNDGÅ)
+
+### 1. Manuel Key Konstruktion
+
+```typescript
+// FORKERT
+const key = `${resourceId}:${dateStr}`;
+
+// KORREKT
+const key = filterTemplate.buildKeyFromEvent(event);
+```
+
+### 2. Direkte Dataset Læsning for Matching
+
+```typescript
+// FORKERT
+const columnKey = column.dataset.columnKey;
+
+// KORREKT
+const columnKey = filterTemplate.buildKeyFromColumn(column);
+```
+
+### 3. Hardcoded Field Order
+
+```typescript
+// FORKERT
+const key = [event.resourceId, dateStr].join(':');
+
+// KORREKT
+// Lad FilterTemplate håndtere rækkefølge fra ViewConfig
+```
+
+### 4. Separate Key-Formater
+
+```typescript
+// FORKERT: DateService til kolonner, FilterTemplate til events
+DateService.buildColumnKey(segments)  // "2025-12-09:EMP001"
+FilterTemplate.buildKeyFromEvent(e)   // "EMP001:2025-12-09"
+
+// KORREKT: FilterTemplate til begge
+FilterTemplate.buildKeyFromColumn(col)
+FilterTemplate.buildKeyFromEvent(event)
+```
+
+---
+
+## Testcases
+
+### TC1: Simple View Matching
+
+```
+Given: ViewConfig med [date] grouping
+When:  Event har start=2025-12-09
+Then:  Event matcher kolonne med data-date="2025-12-09"
+```
+
+### TC2: Resource View Matching
+
+```
+Given: ViewConfig med [resource, date] groupings
+When:  Event har resourceId=EMP001, start=2025-12-09
+Then:  Event matcher kolonne med data-resource-id="EMP001" OG data-date="2025-12-09"
+```
+
+### TC3: Team View Matching
+
+```
+Given: ViewConfig med [team, resource, date] groupings
+       Resource EMP001 tilhører team-1
+When:  Event har resourceId=EMP001, start=2025-12-09
+Then:  Event matcher kolonne med data-team-id="team-1" OG data-resource-id="EMP001" OG data-date="2025-12-09"
+```
+
+### TC4: Multi-Day Event
+
+```
+Given: Event spænder 2025-12-09 til 2025-12-11
+When:  HeaderDrawerRenderer beregner layout
+Then:  Event vises fra kolonne 09 til kolonne 11 (inclusive)
+```
+
+---
+
+## Ændringslog
+
+| Version | Dato | Ændring |
+|---------|------|---------|
+| 1.0 | 2025-12-15 | Initial specifikation |

docs/filter-template.md

@@ -0,0 +1,180 @@
+# FilterTemplate System
+
+## Problem
+
+En kolonne har en unik nøgle baseret på view-konfigurationen (f.eks. team + resource + date).
+Events skal matches mod denne nøgle - men kun på de felter viewet definerer.
+
+## Løsning: FilterTemplate
+
+ViewConfig definerer hvilke felter (idProperties) der indgår i kolonnens nøgle.
+Samme template bruges til at bygge nøgle for både kolonne og event.
+
+**Princip:** Kolonnens nøgle-template bestemmer hvad der matches på.
+
+---
+
+## ViewConfig med idProperty
+
+ViewConfig er kilden til sandhed - den definerer grupper OG deres relations-id property.
+
+```typescript
+interface GroupingConfig {
+  type: string;                 // 'team', 'resource', 'date'
+  values: string[];             // ['EMP001', 'EMP002']
+  idProperty: string;           // property-navn på event (eks. 'resourceId')
+  derivedFrom?: string;         // for date: udledes fra 'start'
+}
+```
+
+### Eksempler
+
+**Team → Resource → Date view:**
+```typescript
+{
+  groupings: [
+    { type: 'team', values: ['team-a'], idProperty: 'teamId' },
+    { type: 'resource', values: ['EMP001', 'EMP002'], idProperty: 'resourceId' },
+    { type: 'date', values: ['2025-12-09', '2025-12-10'], idProperty: 'date', derivedFrom: 'start' }
+  ]
+}
+```
+
+**Simple date-only view:**
+```typescript
+{
+  groupings: [
+    { type: 'date', values: ['2025-12-09', '2025-12-10'], idProperty: 'date', derivedFrom: 'start' }
+  ]
+}
+```
+
+---
+
+## FilterTemplate Klasse
+
+```typescript
+class FilterTemplate {
+  private fields: Array<{
+    idProperty: string;
+    derivedFrom?: string;
+  }> = [];
+
+  addField(idProperty: string, derivedFrom?: string): this {
+    this.fields.push({ idProperty, derivedFrom });
+    return this;
+  }
+
+  buildKeyFromColumn(column: HTMLElement): string {
+    return this.fields
+      .map(f => column.dataset[f.idProperty] || '')
+      .join(':');
+  }
+
+  buildKeyFromEvent(event: ICalendarEvent, dateService: DateService): string {
+    return this.fields
+      .map(f => {
+        if (f.derivedFrom) {
+          return dateService.getDateKey((event as any)[f.derivedFrom]);
+        }
+        return (event as any)[f.idProperty] || '';
+      })
+      .join(':');
+  }
+}
+```
+
+---
+
+## Flow
+
+```
+Orchestrator
+    │
+    ├── Læs ViewConfig.groupings
+    │
+    ├── Byg FilterTemplate fra groupings:
+    │     for (grouping of viewConfig.groupings) {
+    │       template.addField(grouping.idProperty, grouping.derivedFrom);
+    │     }
+    │
+    ├── Kør group-renderers (bygger headers + kolonner)
+    │     └── DateRenderer sætter column.dataset[idProperty] for ALLE grupperinger
+    │
+    └── EventRenderer.render(ctx, template)
+            │
+            └── for each column:
+                    columnKey = template.buildKeyFromColumn(column)
+                    columnEvents = events.filter(e =>
+                        template.buildKeyFromEvent(e) === columnKey
+                    )
+```
+
+---
+
+## Eksempler
+
+### 3-niveau view: Team → Resource → Date
+
+**ViewConfig:**
+```typescript
+groupings: [
+  { type: 'team', values: ['team-a'], idProperty: 'teamId' },
+  { type: 'resource', values: ['EMP001'], idProperty: 'resourceId' },
+  { type: 'date', values: ['2025-12-09'], idProperty: 'date', derivedFrom: 'start' }
+]
+```
+
+**Template:** `['teamId', 'resourceId', 'date']`
+
+**Kolonne-nøgle:** `"team-a:EMP001:2025-12-09"`
+**Event-nøgle:** `"team-a:EMP001:2025-12-09"`
+
+**Match!**
+
+---
+
+### 2-niveau view: Resource → Date
+
+**ViewConfig:**
+```typescript
+groupings: [
+  { type: 'resource', values: ['EMP001'], idProperty: 'resourceId' },
+  { type: 'date', values: ['2025-12-09'], idProperty: 'date', derivedFrom: 'start' }
+]
+```
+
+**Template:** `['resourceId', 'date']`
+
+**Kolonne-nøgle:** `"EMP001:2025-12-09"`
+**Event-nøgle:** `"EMP001:2025-12-09"` (teamId ignoreres - ikke i template)
+
+**Match!**
+
+---
+
+### 1-niveau view: Kun Date
+
+**ViewConfig:**
+```typescript
+groupings: [
+  { type: 'date', values: ['2025-12-09'], idProperty: 'date', derivedFrom: 'start' }
+]
+```
+
+**Template:** `['date']`
+
+**Kolonne-nøgle:** `"2025-12-09"`
+**Event-nøgle:** `"2025-12-09"` (alle andre felter ignoreres)
+
+**Match!** Samme event vises i alle views - kun de relevante felter indgår i matching.
+
+---
+
+## Kerneprincipper
+
+1. **ViewConfig definerer nøgle-template** - hvilke idProperties der indgår
+2. **Samme template til kolonne og event** - sikrer konsistent matching
+3. **Felter udenfor template ignoreres** - event med ekstra felter matcher stadig
+4. **idProperty** - eksplicit mapping mellem gruppering og event-felt
+5. **derivedFrom** - håndterer felter der udledes (f.eks. date fra start)

package-lock.json

@@ -10,9 +10,11 @@
       "dependencies": {
         "@novadi/core": "^0.6.0",
         "@rollup/rollup-win32-x64-msvc": "^4.52.2",
+        "@sevenweirdpeople/swp-charting": "^0.2.2",
         "dayjs": "^1.11.19",
         "fuse.js": "^7.1.0",
-        "json-diff-ts": "^4.8.2"
+        "json-diff-ts": "^4.8.2",
+        "ts-linq-light": "^1.0.0"
       },
       "devDependencies": {
         "@fullhuman/postcss-purgecss": "^7.0.2",
@@ -31,10 +33,12 @@
         "postcss-cli": "^11.0.1",
         "postcss-nesting": "^13.0.2",
         "purgecss": "^7.0.2",
+        "read-excel-file": "^6.0.1",
         "rollup": "^4.52.5",
         "tslib": "^2.8.1",
         "typescript": "^5.0.0",
-        "vitest": "^3.2.4"
+        "vitest": "^3.2.4",
+        "xlsx": "^0.18.5"
       }
     },
     "node_modules/@asamuzakjp/css-color": {
@@ -1172,6 +1176,12 @@
         "win32"
       ]
     },
+    "node_modules/@sevenweirdpeople/swp-charting": {
+      "version": "0.2.2",
+      "resolved": "https://registry.npmjs.org/@sevenweirdpeople/swp-charting/-/swp-charting-0.2.2.tgz",
+      "integrity": "sha512-q9p7TOSMAq6I0t6jGEWpmjR7l2H8q8G0TnXbIpDutCz5a2JEqMDFe0NGBGcCwze2rvvRnRvCz8P2zGMQlHmphw==",
+      "license": "MIT"
+    },
     "node_modules/@types/chai": {
       "version": "5.2.2",
       "resolved": "https://registry.npmjs.org/@types/chai/-/chai-5.2.2.tgz",
@@ -1340,6 +1350,16 @@
         "url": "https://opencollective.com/vitest"
       }
     },
+    "node_modules/@xmldom/xmldom": {
+      "version": "0.8.11",
+      "resolved": "https://registry.npmjs.org/@xmldom/xmldom/-/xmldom-0.8.11.tgz",
+      "integrity": "sha512-cQzWCtO6C8TQiYl1ruKNn2U6Ao4o4WBBcbL61yJl84x+j5sOWWFU9X7DpND8XZG3daDppSsigMdfAIl2upQBRw==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=10.0.0"
+      }
+    },
     "node_modules/acorn": {
       "version": "8.15.0",
       "resolved": "https://registry.npmjs.org/acorn/-/acorn-8.15.0.tgz",
@@ -1352,6 +1372,16 @@
         "node": ">=0.4.0"
       }
     },
+    "node_modules/adler-32": {
+      "version": "1.3.1",
+      "resolved": "https://registry.npmjs.org/adler-32/-/adler-32-1.3.1.tgz",
+      "integrity": "sha512-ynZ4w/nUUv5rrsR8UUGoe1VC9hZj6V5hU9Qw1HlMDJGEJw5S7TfTErWTjMys6M7vr0YWcPqs3qAr4ss0nDfP+A==",
+      "dev": true,
+      "license": "Apache-2.0",
+      "engines": {
+        "node": ">=0.8"
+      }
+    },
     "node_modules/agent-base": {
       "version": "7.1.4",
       "resolved": "https://registry.npmjs.org/agent-base/-/agent-base-7.1.4.tgz",
@@ -1502,6 +1532,13 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "node_modules/bluebird": {
+      "version": "3.7.2",
+      "resolved": "https://registry.npmjs.org/bluebird/-/bluebird-3.7.2.tgz",
+      "integrity": "sha512-XpNj6GDQzdfW+r2Wnn7xiSAd7TM3jzkxGXBGTtWKuSXv1xUV+azxAm8jdWZN06QTQk+2N2XB9jRDkvbmQmcRtg==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/boolbase": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/boolbase/-/boolbase-1.0.0.tgz",
@@ -1610,6 +1647,20 @@
       ],
       "license": "CC-BY-4.0"
     },
+    "node_modules/cfb": {
+      "version": "1.2.2",
+      "resolved": "https://registry.npmjs.org/cfb/-/cfb-1.2.2.tgz",
+      "integrity": "sha512-KfdUZsSOw19/ObEWasvBP/Ac4reZvAGauZhs6S/gqNhXhI7cKwvlH7ulj+dOEYnca4bm4SGo8C1bTAQvnTjgQA==",
+      "dev": true,
+      "license": "Apache-2.0",
+      "dependencies": {
+        "adler-32": "~1.3.0",
+        "crc-32": "~1.2.0"
+      },
+      "engines": {
+        "node": ">=0.8"
+      }
+    },
     "node_modules/chai": {
       "version": "5.3.3",
       "resolved": "https://registry.npmjs.org/chai/-/chai-5.3.3.tgz",
@@ -1773,6 +1824,16 @@
         "url": "https://github.com/chalk/wrap-ansi?sponsor=1"
       }
     },
+    "node_modules/codepage": {
+      "version": "1.15.0",
+      "resolved": "https://registry.npmjs.org/codepage/-/codepage-1.15.0.tgz",
+      "integrity": "sha512-3g6NUTPd/YtuuGrhMnOMRjFc+LJw/bnMp3+0r/Wcz3IXUuCosKRJvMphm5+Q+bvTVGcJJuRvVLuYba+WojaFaA==",
+      "dev": true,
+      "license": "Apache-2.0",
+      "engines": {
+        "node": ">=0.8"
+      }
+    },
     "node_modules/color-convert": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-2.0.1.tgz",
@@ -1826,6 +1887,26 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/core-util-is": {
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/core-util-is/-/core-util-is-1.0.3.tgz",
+      "integrity": "sha512-ZQBvi1DcpJ4GDqanjucZ2Hj3wEO5pZDS89BWbkcrvdxksJorwUDDZamX9ldFkp9aw2lmBDLgkObEA4DWNJ9FYQ==",
+      "dev": true,
+      "license": "MIT"
+    },
+    "node_modules/crc-32": {
+      "version": "1.2.2",
+      "resolved": "https://registry.npmjs.org/crc-32/-/crc-32-1.2.2.tgz",
+      "integrity": "sha512-ROmzCKrTnOwybPcJApAA6WBWij23HVfGVNKqqrZpuyZOHqK2CwHSvpGuyt/UNNvaIjEd8X5IFGp4Mh+Ie1IHJQ==",
+      "dev": true,
+      "license": "Apache-2.0",
+      "bin": {
+        "crc32": "bin/crc32.njs"
+      },
+      "engines": {
+        "node": ">=0.8"
+      }
+    },
     "node_modules/cross-spawn": {
       "version": "7.0.6",
       "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-7.0.6.tgz",
@@ -2302,6 +2383,16 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/duplexer2": {
+      "version": "0.1.4",
+      "resolved": "https://registry.npmjs.org/duplexer2/-/duplexer2-0.1.4.tgz",
+      "integrity": "sha512-asLFVfWWtJ90ZyOUHMqk7/S2w2guQKxUI2itj3d92ADHhxUSbCMGi1f1cBcJ7xM1To+pE/Khbwo1yuNbMEPKeA==",
+      "dev": true,
+      "license": "BSD-3-Clause",
+      "dependencies": {
+        "readable-stream": "^2.0.2"
+      }
+    },
     "node_modules/eastasianwidth": {
       "version": "0.2.0",
       "resolved": "https://registry.npmjs.org/eastasianwidth/-/eastasianwidth-0.2.0.tgz",
@@ -2573,6 +2664,16 @@
         "url": "https://github.com/sponsors/isaacs"
       }
     },
+    "node_modules/frac": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/frac/-/frac-1.1.2.tgz",
+      "integrity": "sha512-w/XBfkibaTl3YDqASwfDUqkna4Z2p9cFSr1aHDt0WoMTECnRfBOv2WArlZILlqgWlmdIlALXGpM2AOhEk5W3IA==",
+      "dev": true,
+      "license": "Apache-2.0",
+      "engines": {
+        "node": ">=0.8"
+      }
+    },
     "node_modules/fraction.js": {
       "version": "4.3.7",
       "resolved": "https://registry.npmjs.org/fraction.js/-/fraction.js-4.3.7.tgz",
@@ -2850,6 +2951,13 @@
         "node": ">=0.10.0"
       }
     },
+    "node_modules/inherits": {
+      "version": "2.0.4",
+      "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.4.tgz",
+      "integrity": "sha512-k/vGaX4/Yla3WzyMCvTQOXYeIHvqOKtnqBduzTHpzpQZzAskKMhZ2K+EnBiSM9zGSoIFeMpXKxa4dYeZIQqewQ==",
+      "dev": true,
+      "license": "ISC"
+    },
     "node_modules/is-binary-path": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/is-binary-path/-/is-binary-path-2.1.0.tgz",
@@ -3028,6 +3136,13 @@
         "node": ">=0.10.0"
       }
     },
+    "node_modules/isarray": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/isarray/-/isarray-1.0.0.tgz",
+      "integrity": "sha512-VLghIWNM6ELQzo7zwmcg0NmTVyWKYjvIeM83yjp0wRDTmUnrM678fQbcKBo6n2CJEF0szoG//ytg+TKla89ALQ==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/isexe": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/isexe/-/isexe-2.0.0.tgz",
@@ -3317,6 +3432,13 @@
       "dev": true,
       "license": "ISC"
     },
+    "node_modules/node-int64": {
+      "version": "0.4.0",
+      "resolved": "https://registry.npmjs.org/node-int64/-/node-int64-0.4.0.tgz",
+      "integrity": "sha512-O5lz91xSOeoXP6DulyHfllpq+Eg00MWitZIbtPfoSEvqIHdl5gfcY6hYzDWnj0qD5tz52PI08u9qUvSVeUBeHw==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/node-releases": {
       "version": "2.0.27",
       "resolved": "https://registry.npmjs.org/node-releases/-/node-releases-2.0.27.tgz",
@@ -4281,6 +4403,13 @@
         "node": ">= 0.8"
       }
     },
+    "node_modules/process-nextick-args": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/process-nextick-args/-/process-nextick-args-2.0.1.tgz",
+      "integrity": "sha512-3ouUOpQhtgrbOa17J7+uxOTpITYWaGP7/AhoR3+A+/1e9skrzelGi/dXzEYyvbxubEF6Wn2ypscTKiKJFFn1ag==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/pseudo-classes": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/pseudo-classes/-/pseudo-classes-1.0.0.tgz",
@@ -4331,6 +4460,34 @@
         "pify": "^2.3.0"
       }
     },
+    "node_modules/read-excel-file": {
+      "version": "6.0.1",
+      "resolved": "https://registry.npmjs.org/read-excel-file/-/read-excel-file-6.0.1.tgz",
+      "integrity": "sha512-rH6huBFxsjZsUARCYh55O08cn1gqZH8bnLf0kI6y5K7+9yqBVzy8veO4gPV4VGKv4M9rdcRtXTDGZZNwPi1gDA==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@xmldom/xmldom": "^0.8.11",
+        "fflate": "^0.8.2",
+        "unzipper": "^0.12.3"
+      }
+    },
+    "node_modules/readable-stream": {
+      "version": "2.3.8",
+      "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.3.8.tgz",
+      "integrity": "sha512-8p0AUk4XODgIewSi0l8Epjs+EVnWiK7NoDIEGU0HhE7+ZyY8D1IMY7odu5lRrFXGg71L15KG8QrPmum45RTtdA==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "core-util-is": "~1.0.0",
+        "inherits": "~2.0.3",
+        "isarray": "~1.0.0",
+        "process-nextick-args": "~2.0.0",
+        "safe-buffer": "~5.1.1",
+        "string_decoder": "~1.1.1",
+        "util-deprecate": "~1.0.1"
+      }
+    },
     "node_modules/readdirp": {
       "version": "3.6.0",
       "resolved": "https://registry.npmjs.org/readdirp/-/readdirp-3.6.0.tgz",
@@ -4471,6 +4628,13 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/safe-buffer": {
+      "version": "5.1.2",
+      "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.1.2.tgz",
+      "integrity": "sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/safer-buffer": {
       "version": "2.1.2",
       "resolved": "https://registry.npmjs.org/safer-buffer/-/safer-buffer-2.1.2.tgz",
@@ -4589,6 +4753,19 @@
         "specificity": "bin/specificity"
       }
     },
+    "node_modules/ssf": {
+      "version": "0.11.2",
+      "resolved": "https://registry.npmjs.org/ssf/-/ssf-0.11.2.tgz",
+      "integrity": "sha512-+idbmIXoYET47hH+d7dfm2epdOMUDjqcB4648sTZ+t2JwoyBFL/insLfB/racrDmsKB3diwsDA696pZMieAC5g==",
+      "dev": true,
+      "license": "Apache-2.0",
+      "dependencies": {
+        "frac": "~1.1.2"
+      },
+      "engines": {
+        "node": ">=0.8"
+      }
+    },
     "node_modules/stackback": {
       "version": "0.0.2",
       "resolved": "https://registry.npmjs.org/stackback/-/stackback-0.0.2.tgz",
@@ -4603,6 +4780,16 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/string_decoder": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
+      "integrity": "sha512-n/ShnvDi6FHbbVfviro+WojiFzv+s8MPMHBczVePfUpDJLwoLT0ht1l4YwBCbi8pJAveEEdnkHyPyTP/mzRfwg==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "safe-buffer": "~5.1.0"
+      }
+    },
     "node_modules/string-width": {
       "version": "5.1.2",
       "resolved": "https://registry.npmjs.org/string-width/-/string-width-5.1.2.tgz",
@@ -4958,6 +5145,31 @@
         "node": ">=20"
       }
     },
+    "node_modules/ts-linq-light": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/ts-linq-light/-/ts-linq-light-1.0.1.tgz",
+      "integrity": "sha512-Qk1TKZ8M/XYH6Vt+zUOtAyVOqezIMd3r7EDtgCPOnWgIs0Xdrj/miqUQAEoRl3LttbQQ/6gBMhM/84S/mTb/sg==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=18.0.0"
+      },
+      "optionalDependencies": {
+        "@rollup/rollup-win32-x64-msvc": "^4.53.3"
+      }
+    },
+    "node_modules/ts-linq-light/node_modules/@rollup/rollup-win32-x64-msvc": {
+      "version": "4.53.3",
+      "resolved": "https://registry.npmjs.org/@rollup/rollup-win32-x64-msvc/-/rollup-win32-x64-msvc-4.53.3.tgz",
+      "integrity": "sha512-UhTd8u31dXadv0MopwGgNOBpUVROFKWVQgAg5N1ESyCz8AuBcMqm4AuTjrwgQKGDfoFuz02EuMRHQIw/frmYKQ==",
+      "cpu": [
+        "x64"
+      ],
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "win32"
+      ]
+    },
     "node_modules/tslib": {
       "version": "2.8.1",
       "resolved": "https://registry.npmjs.org/tslib/-/tslib-2.8.1.tgz",
@@ -5015,6 +5227,27 @@
         "node": ">=18.12.0"
       }
     },
+    "node_modules/unzipper": {
+      "version": "0.12.3",
+      "resolved": "https://registry.npmjs.org/unzipper/-/unzipper-0.12.3.tgz",
+      "integrity": "sha512-PZ8hTS+AqcGxsaQntl3IRBw65QrBI6lxzqDEL7IAo/XCEqRTKGfOX56Vea5TH9SZczRVxuzk1re04z/YjuYCJA==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "bluebird": "~3.7.2",
+        "duplexer2": "~0.1.4",
+        "fs-extra": "^11.2.0",
+        "graceful-fs": "^4.2.2",
+        "node-int64": "^0.4.0"
+      }
+    },
+    "node_modules/unzipper/node_modules/graceful-fs": {
+      "version": "4.2.11",
+      "resolved": "https://registry.npmjs.org/graceful-fs/-/graceful-fs-4.2.11.tgz",
+      "integrity": "sha512-RbJ5/jmFcNNCcDV5o9eTnBLJ/HszWV0P73bc+Ff4nS/rJj+YaS6IGyiOL0VoBYX+l1Wrl3k63h/KrH+nhJ0XvQ==",
+      "dev": true,
+      "license": "ISC"
+    },
     "node_modules/update-browserslist-db": {
       "version": "1.1.4",
       "resolved": "https://registry.npmjs.org/update-browserslist-db/-/update-browserslist-db-1.1.4.tgz",
@@ -5763,6 +5996,26 @@
         "node": ">=8"
       }
     },
+    "node_modules/wmf": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/wmf/-/wmf-1.0.2.tgz",
+      "integrity": "sha512-/p9K7bEh0Dj6WbXg4JG0xvLQmIadrner1bi45VMJTfnbVHsc7yIajZyoSoK60/dtVBs12Fm6WkUI5/3WAVsNMw==",
+      "dev": true,
+      "license": "Apache-2.0",
+      "engines": {
+        "node": ">=0.8"
+      }
+    },
+    "node_modules/word": {
+      "version": "0.3.0",
+      "resolved": "https://registry.npmjs.org/word/-/word-0.3.0.tgz",
+      "integrity": "sha512-OELeY0Q61OXpdUfTp+oweA/vtLVg5VDOXh+3he3PNzLGG/y0oylSOC1xRVj0+l4vQ3tj/bB1HVHv1ocXkQceFA==",
+      "dev": true,
+      "license": "Apache-2.0",
+      "engines": {
+        "node": ">=0.8"
+      }
+    },
     "node_modules/wrap-ansi": {
       "version": "8.1.0",
       "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-8.1.0.tgz",
@@ -5883,6 +6136,28 @@
         }
       }
     },
+    "node_modules/xlsx": {
+      "version": "0.18.5",
+      "resolved": "https://registry.npmjs.org/xlsx/-/xlsx-0.18.5.tgz",
+      "integrity": "sha512-dmg3LCjBPHZnQp5/F/+nnTa+miPJxUXB6vtk42YjBBKayDNagxGEeIdWApkYPOf3Z3pm3k62Knjzp7lMeTEtFQ==",
+      "dev": true,
+      "license": "Apache-2.0",
+      "dependencies": {
+        "adler-32": "~1.3.0",
+        "cfb": "~1.2.1",
+        "codepage": "~1.15.0",
+        "crc-32": "~1.2.1",
+        "ssf": "~0.11.2",
+        "wmf": "~1.0.1",
+        "word": "~0.3.0"
+      },
+      "bin": {
+        "xlsx": "bin/xlsx.njs"
+      },
+      "engines": {
+        "node": ">=0.8"
+      }
+    },
     "node_modules/xml-name-validator": {
       "version": "5.0.0",
       "resolved": "https://registry.npmjs.org/xml-name-validator/-/xml-name-validator-5.0.0.tgz",

package.json

@@ -33,16 +33,20 @@
     "postcss-cli": "^11.0.1",
     "postcss-nesting": "^13.0.2",
     "purgecss": "^7.0.2",
+    "read-excel-file": "^6.0.1",
     "rollup": "^4.52.5",
     "tslib": "^2.8.1",
     "typescript": "^5.0.0",
-    "vitest": "^3.2.4"
+    "vitest": "^3.2.4",
+    "xlsx": "^0.18.5"
   },
   "dependencies": {
     "@novadi/core": "^0.6.0",
     "@rollup/rollup-win32-x64-msvc": "^4.52.2",
+    "@sevenweirdpeople/swp-charting": "^0.2.2",
     "dayjs": "^1.11.19",
     "fuse.js": "^7.1.0",
-    "json-diff-ts": "^4.8.2"
+    "json-diff-ts": "^4.8.2",
+    "ts-linq-light": "^1.0.0"
   }
 }

packages/calendar/README.md

@@ -0,0 +1,620 @@
+# Calendar
+
+Professional TypeScript calendar component with offline-first architecture, drag-and-drop functionality, and real-time synchronization capabilities.
+
+## Features
+
+- **Multiple View Modes**: Date-based (day/week/month) and resource-based (people, rooms) views
+- **Drag & Drop**: Smooth event dragging with snap-to-grid, cross-column movement, and timed/all-day conversion
+- **Event Resizing**: Intuitive resize handles for adjusting event duration
+- **Offline-First**: IndexedDB storage with automatic background sync
+- **Event-Driven Architecture**: Decoupled components via centralized EventBus
+- **Dependency Injection**: Built on NovaDI for clean, testable architecture
+- **Extensions**: Modular extensions for teams, departments, bookings, customers, schedules, and audit logging
+
+## Installation
+
+```bash
+npm install calendar
+```
+
+## Quick Start (AI-Friendly Setup Guide)
+
+### Step 1: Create HTML Structure
+
+```html
+<!DOCTYPE html>
+<html>
+<head>
+  <link rel="stylesheet" href="node_modules/calendar/dist/css/calendar.css">
+</head>
+<body>
+  <div class="calendar-wrapper">
+    <swp-calendar-container>
+      <swp-time-axis>
+        <swp-header-spacer></swp-header-spacer>
+        <swp-time-axis-content id="time-axis"></swp-time-axis-content>
+      </swp-time-axis>
+      <swp-grid-container>
+        <swp-header-viewport>
+          <swp-header-track>
+            <swp-calendar-header></swp-calendar-header>
+          </swp-header-track>
+          <swp-header-drawer></swp-header-drawer>
+        </swp-header-viewport>
+        <swp-content-viewport>
+          <swp-content-track>
+            <swp-scrollable-content>
+              <swp-time-grid>
+                <swp-grid-lines></swp-grid-lines>
+                <swp-day-columns></swp-day-columns>
+              </swp-time-grid>
+            </swp-scrollable-content>
+          </swp-content-track>
+        </swp-content-viewport>
+      </swp-grid-container>
+    </swp-calendar-container>
+  </div>
+
+  <script type="module" src="dist/bundle.js"></script>
+</body>
+</html>
+```
+
+### Step 2: Initialize Calendar
+
+```typescript
+import { Container } from '@novadi/core';
+import {
+  registerCoreServices,
+  CalendarApp,
+  IndexedDBContext,
+  SettingsService,
+  ViewConfigService,
+  EventService,
+  EventBus,
+  CalendarEvents
+} from 'calendar';
+
+async function init() {
+  // 1. Create DI container and register services
+  const container = new Container();
+  const builder = container.builder();
+  registerCoreServices(builder, {
+    dbConfig: { dbName: 'MyCalendarDB', dbVersion: 1 }
+  });
+  const app = builder.build();
+
+  // 2. Initialize IndexedDB
+  const dbContext = app.resolveType<IndexedDBContext>();
+  await dbContext.initialize();
+
+  // 3. Seed required settings (first time only)
+  const settingsService = app.resolveType<SettingsService>();
+  const viewConfigService = app.resolveType<ViewConfigService>();
+
+  await settingsService.save({
+    id: 'grid',
+    dayStartHour: 8,
+    dayEndHour: 17,
+    workStartHour: 9,
+    workEndHour: 16,
+    hourHeight: 64,
+    snapInterval: 15,
+    syncStatus: 'synced'
+  });
+
+  await settingsService.save({
+    id: 'workweek',
+    presets: {
+      standard: { id: 'standard', label: 'Standard', workDays: [1, 2, 3, 4, 5], periodDays: 7 }
+    },
+    defaultPreset: 'standard',
+    firstDayOfWeek: 1,
+    syncStatus: 'synced'
+  });
+
+  await viewConfigService.save({
+    id: 'simple',
+    groupings: [{ type: 'date', values: [], idProperty: 'date', derivedFrom: 'start' }],
+    syncStatus: 'synced'
+  });
+
+  // 4. Initialize CalendarApp
+  const calendarApp = app.resolveType<CalendarApp>();
+  const containerEl = document.querySelector('swp-calendar-container') as HTMLElement;
+  await calendarApp.init(containerEl);
+
+  // 5. Render a view
+  const eventBus = app.resolveType<EventBus>();
+  eventBus.emit(CalendarEvents.CMD_RENDER, { viewId: 'simple' });
+}
+
+init().catch(console.error);
+```
+
+### Step 3: Add Events
+
+```typescript
+const eventService = app.resolveType<EventService>();
+
+await eventService.save({
+  id: crypto.randomUUID(),
+  title: 'Meeting',
+  start: new Date('2024-01-15T09:00:00'),
+  end: new Date('2024-01-15T10:00:00'),
+  type: 'meeting',
+  allDay: false,
+  syncStatus: 'synced'
+});
+```
+
+---
+
+## Architecture
+
+### Core Components
+
+| Component | Description |
+|-----------|-------------|
+| `CalendarApp` | Main application entry point |
+| `CalendarOrchestrator` | Coordinates rendering pipeline |
+| `EventBus` | Central event dispatcher for all inter-component communication |
+| `DateService` | Date calculations and formatting |
+| `IndexedDBContext` | Offline storage infrastructure |
+
+### Managers
+
+| Manager | Description |
+|---------|-------------|
+| `DragDropManager` | Event drag-drop with smooth animations and snap-to-grid |
+| `EdgeScrollManager` | Automatic scrolling at viewport edges during drag |
+| `ResizeManager` | Event resizing with visual feedback |
+| `ScrollManager` | Scroll behavior and position management |
+| `HeaderDrawerManager` | All-day events drawer toggle |
+| `EventPersistenceManager` | Saves drag/resize changes to storage |
+
+### Renderers
+
+| Renderer | Description |
+|----------|-------------|
+| `DateRenderer` | Renders date-based column groupings |
+| `ResourceRenderer` | Renders resource-based column groupings |
+| `EventRenderer` | Renders timed events in columns |
+| `ScheduleRenderer` | Renders working hours backgrounds |
+| `HeaderDrawerRenderer` | Renders all-day events in header |
+| `TimeAxisRenderer` | Renders time labels on the left axis |
+
+### Storage
+
+| Service | Description |
+|---------|-------------|
+| `EventService` / `EventStore` | Calendar event CRUD |
+| `ResourceService` / `ResourceStore` | Resource management |
+| `SettingsService` / `SettingsStore` | Tenant settings |
+| `ViewConfigService` / `ViewConfigStore` | View configurations |
+
+---
+
+## Events Reference
+
+### Lifecycle Events
+
+| Event | Constant | Payload | Description |
+|-------|----------|---------|-------------|
+| `core:initialized` | `CoreEvents.INITIALIZED` | - | Calendar core initialized |
+| `core:ready` | `CoreEvents.READY` | - | Calendar ready for interaction |
+| `core:destroyed` | `CoreEvents.DESTROYED` | - | Calendar destroyed |
+
+### View Events
+
+| Event | Constant | Payload | Description |
+|-------|----------|---------|-------------|
+| `view:changed` | `CoreEvents.VIEW_CHANGED` | `{ viewId: string }` | View type changed |
+| `view:rendered` | `CoreEvents.VIEW_RENDERED` | - | View finished rendering |
+
+### Navigation Events
+
+| Event | Constant | Payload | Description |
+|-------|----------|---------|-------------|
+| `nav:date-changed` | `CoreEvents.DATE_CHANGED` | `{ date: Date }` | Current date changed |
+| `nav:navigation-completed` | `CoreEvents.NAVIGATION_COMPLETED` | - | Navigation animation completed |
+
+### Data Events
+
+| Event | Constant | Payload | Description |
+|-------|----------|---------|-------------|
+| `data:loading` | `CoreEvents.DATA_LOADING` | - | Data loading started |
+| `data:loaded` | `CoreEvents.DATA_LOADED` | - | Data loading completed |
+| `data:error` | `CoreEvents.DATA_ERROR` | `{ error: Error }` | Data loading error |
+
+### Grid Events
+
+| Event | Constant | Payload | Description |
+|-------|----------|---------|-------------|
+| `grid:rendered` | `CoreEvents.GRID_RENDERED` | - | Grid finished rendering |
+| `grid:clicked` | `CoreEvents.GRID_CLICKED` | `{ time: Date, columnKey: string }` | Grid area clicked |
+
+### Event Management
+
+| Event | Constant | Payload | Description |
+|-------|----------|---------|-------------|
+| `event:created` | `CoreEvents.EVENT_CREATED` | `ICalendarEvent` | Event created |
+| `event:updated` | `CoreEvents.EVENT_UPDATED` | `IEventUpdatedPayload` | Event updated |
+| `event:deleted` | `CoreEvents.EVENT_DELETED` | `{ eventId: string }` | Event deleted |
+| `event:selected` | `CoreEvents.EVENT_SELECTED` | `{ eventId: string }` | Event selected |
+
+### Drag-Drop Events
+
+| Event | Constant | Payload | Description |
+|-------|----------|---------|-------------|
+| `event:drag-start` | `CoreEvents.EVENT_DRAG_START` | `IDragStartPayload` | Drag started |
+| `event:drag-move` | `CoreEvents.EVENT_DRAG_MOVE` | `IDragMovePayload` | Dragging (throttled) |
+| `event:drag-end` | `CoreEvents.EVENT_DRAG_END` | `IDragEndPayload` | Drag completed |
+| `event:drag-cancel` | `CoreEvents.EVENT_DRAG_CANCEL` | `IDragCancelPayload` | Drag cancelled |
+| `event:drag-column-change` | `CoreEvents.EVENT_DRAG_COLUMN_CHANGE` | `IDragColumnChangePayload` | Moved to different column |
+
+### Header Drag Events (Timed to All-Day Conversion)
+
+| Event | Constant | Payload | Description |
+|-------|----------|---------|-------------|
+| `event:drag-enter-header` | `CoreEvents.EVENT_DRAG_ENTER_HEADER` | `IDragEnterHeaderPayload` | Entered header area |
+| `event:drag-move-header` | `CoreEvents.EVENT_DRAG_MOVE_HEADER` | `IDragMoveHeaderPayload` | Moving in header area |
+| `event:drag-leave-header` | `CoreEvents.EVENT_DRAG_LEAVE_HEADER` | `IDragLeaveHeaderPayload` | Left header area |
+
+### Resize Events
+
+| Event | Constant | Payload | Description |
+|-------|----------|---------|-------------|
+| `event:resize-start` | `CoreEvents.EVENT_RESIZE_START` | `IResizeStartPayload` | Resize started |
+| `event:resize-end` | `CoreEvents.EVENT_RESIZE_END` | `IResizeEndPayload` | Resize completed |
+
+### Edge Scroll Events
+
+| Event | Constant | Payload | Description |
+|-------|----------|---------|-------------|
+| `edge-scroll:tick` | `CoreEvents.EDGE_SCROLL_TICK` | `{ deltaY: number }` | Scroll tick during edge scroll |
+| `edge-scroll:started` | `CoreEvents.EDGE_SCROLL_STARTED` | - | Edge scrolling started |
+| `edge-scroll:stopped` | `CoreEvents.EDGE_SCROLL_STOPPED` | - | Edge scrolling stopped |
+
+### Sync Events
+
+| Event | Constant | Payload | Description |
+|-------|----------|---------|-------------|
+| `sync:started` | `CoreEvents.SYNC_STARTED` | - | Background sync started |
+| `sync:completed` | `CoreEvents.SYNC_COMPLETED` | - | Background sync completed |
+| `sync:failed` | `CoreEvents.SYNC_FAILED` | `{ error: Error }` | Background sync failed |
+
+### Entity Events
+
+| Event | Constant | Payload | Description |
+|-------|----------|---------|-------------|
+| `entity:saved` | `CoreEvents.ENTITY_SAVED` | `IEntitySavedPayload` | Entity saved to storage |
+| `entity:deleted` | `CoreEvents.ENTITY_DELETED` | `IEntityDeletedPayload` | Entity deleted from storage |
+
+### Audit Events
+
+| Event | Constant | Payload | Description |
+|-------|----------|---------|-------------|
+| `audit:logged` | `CoreEvents.AUDIT_LOGGED` | `IAuditLoggedPayload` | Audit entry logged |
+
+### Rendering Events
+
+| Event | Constant | Payload | Description |
+|-------|----------|---------|-------------|
+| `events:rendered` | `CoreEvents.EVENTS_RENDERED` | - | Events finished rendering |
+
+### System Events
+
+| Event | Constant | Payload | Description |
+|-------|----------|---------|-------------|
+| `system:error` | `CoreEvents.ERROR` | `{ error: Error, context?: string }` | System error occurred |
+
+---
+
+## Command Events (Host to Calendar)
+
+Use these to control the calendar from your application:
+
+```typescript
+import { EventBus, CalendarEvents } from 'calendar';
+
+const eventBus = app.resolveType<EventBus>();
+
+// Navigate
+eventBus.emit(CalendarEvents.CMD_NAVIGATE_PREV);
+eventBus.emit(CalendarEvents.CMD_NAVIGATE_NEXT);
+
+// Render a view
+eventBus.emit(CalendarEvents.CMD_RENDER, { viewId: 'simple' });
+
+// Toggle header drawer
+eventBus.emit(CalendarEvents.CMD_DRAWER_TOGGLE);
+
+// Change workweek preset
+eventBus.emit(CalendarEvents.CMD_WORKWEEK_CHANGE, { presetId: 'standard' });
+
+// Update view grouping
+eventBus.emit(CalendarEvents.CMD_VIEW_UPDATE, { type: 'resource', values: ['r1', 'r2'] });
+```
+
+| Command | Constant | Payload | Description |
+|---------|----------|---------|-------------|
+| Navigate Previous | `CalendarEvents.CMD_NAVIGATE_PREV` | - | Go to previous period |
+| Navigate Next | `CalendarEvents.CMD_NAVIGATE_NEXT` | - | Go to next period |
+| Render View | `CalendarEvents.CMD_RENDER` | `{ viewId: string }` | Render specified view |
+| Toggle Drawer | `CalendarEvents.CMD_DRAWER_TOGGLE` | - | Toggle all-day drawer |
+| Change Workweek | `CalendarEvents.CMD_WORKWEEK_CHANGE` | `{ presetId: string }` | Change workweek preset |
+| Update View | `CalendarEvents.CMD_VIEW_UPDATE` | `{ type: string, values: string[] }` | Update grouping values |
+
+---
+
+## Types
+
+### Core Types
+
+```typescript
+// Event types
+type CalendarEventType = 'customer' | 'vacation' | 'break' | 'meeting' | 'blocked';
+
+interface ICalendarEvent {
+  id: string;
+  title: string;
+  description?: string;
+  start: Date;
+  end: Date;
+  type: CalendarEventType;
+  allDay: boolean;
+  bookingId?: string;
+  resourceId?: string;
+  customerId?: string;
+  recurringId?: string;
+  syncStatus: SyncStatus;
+  metadata?: Record<string, unknown>;
+}
+
+// Resource types
+type ResourceType = 'person' | 'room' | 'equipment' | 'vehicle' | 'custom';
+
+interface IResource {
+  id: string;
+  name: string;
+  displayName: string;
+  type: ResourceType;
+  avatarUrl?: string;
+  color?: string;
+  isActive?: boolean;
+  defaultSchedule?: IWeekSchedule;
+  syncStatus: SyncStatus;
+}
+
+// Sync status
+type SyncStatus = 'synced' | 'pending' | 'error';
+```
+
+### Settings Types
+
+```typescript
+interface IGridSettings {
+  id: 'grid';
+  dayStartHour: number;
+  dayEndHour: number;
+  workStartHour: number;
+  workEndHour: number;
+  hourHeight: number;
+  snapInterval: number;
+}
+
+interface IWorkweekPreset {
+  id: string;
+  workDays: number[];      // ISO weekdays: 1=Monday, 7=Sunday
+  label: string;
+  periodDays: number;      // Navigation step (1=day, 7=week)
+}
+
+interface IWeekSchedule {
+  [day: number]: ITimeSlot | null;  // null = off that day
+}
+
+interface ITimeSlot {
+  start: string;  // "HH:mm"
+  end: string;    // "HH:mm"
+}
+```
+
+### Drag-Drop Payloads
+
+```typescript
+interface IDragStartPayload {
+  eventId: string;
+  element: HTMLElement;
+  ghostElement: HTMLElement;
+  startY: number;
+  mouseOffset: { x: number; y: number };
+  columnElement: HTMLElement;
+}
+
+interface IDragEndPayload {
+  swpEvent: SwpEvent;
+  sourceColumnKey: string;
+  target: 'grid' | 'header';
+}
+```
+
+---
+
+## Extensions
+
+Import extensions separately to keep bundle size minimal:
+
+```typescript
+// Teams extension
+import { registerTeams, TeamService, TeamStore, TeamRenderer } from 'calendar/teams';
+
+// Departments extension
+import { registerDepartments, DepartmentService, DepartmentStore } from 'calendar/departments';
+
+// Bookings extension
+import { registerBookings, BookingService, BookingStore } from 'calendar/bookings';
+
+// Customers extension
+import { registerCustomers, CustomerService, CustomerStore } from 'calendar/customers';
+
+// Schedules extension (working hours)
+import { registerSchedules, ResourceScheduleService, ScheduleOverrideService } from 'calendar/schedules';
+
+// Audit extension
+import { registerAudit, AuditService, AuditStore } from 'calendar/audit';
+
+// Register with container builder
+const builder = container.builder();
+registerCoreServices(builder);
+registerTeams(builder);
+registerSchedules(builder);
+// ... etc
+```
+
+---
+
+## Configuration
+
+### Calendar Options
+
+```typescript
+interface ICalendarOptions {
+  timeConfig?: ITimeFormatConfig;
+  gridConfig?: IGridConfig;
+  dbConfig?: IDBConfig;
+}
+
+// Time format configuration
+interface ITimeFormatConfig {
+  timezone: string;         // e.g., 'Europe/Copenhagen'
+  use24HourFormat: boolean;
+  locale: string;           // e.g., 'da-DK'
+  dateFormat: string;
+  showSeconds: boolean;
+}
+
+// Grid configuration
+interface IGridConfig {
+  hourHeight: number;               // Pixels per hour (default: 64)
+  dayStartHour: number;             // Grid start hour (default: 6)
+  dayEndHour: number;               // Grid end hour (default: 18)
+  snapInterval: number;             // Minutes to snap to (default: 15)
+  gridStartThresholdMinutes: number;
+}
+
+// Database configuration
+interface IDBConfig {
+  dbName: string;    // IndexedDB database name
+  dbVersion: number; // Schema version
+}
+```
+
+### Default Configuration
+
+```typescript
+import {
+  defaultTimeFormatConfig,
+  defaultGridConfig,
+  defaultDBConfig
+} from 'calendar';
+
+// Defaults:
+// timezone: Intl.DateTimeFormat().resolvedOptions().timeZone
+// use24HourFormat: true
+// locale: 'da-DK'
+// hourHeight: 64
+// dayStartHour: 6
+// dayEndHour: 18
+// snapInterval: 15
+```
+
+---
+
+## Utilities
+
+### Position Utilities
+
+```typescript
+import {
+  calculateEventPosition,
+  minutesToPixels,
+  pixelsToMinutes,
+  snapToGrid
+} from 'calendar';
+
+// Convert time to pixels
+const pixels = minutesToPixels(120, 64); // 120 mins at 64px/hour = 128px
+
+// Snap to 15-minute grid
+const snapped = snapToGrid(new Date(), 15);
+```
+
+### Event Layout Engine
+
+```typescript
+import { eventsOverlap, calculateColumnLayout } from 'calendar';
+
+// Check if two events overlap
+const overlap = eventsOverlap(event1, event2);
+
+// Calculate layout for overlapping events
+const layout = calculateColumnLayout(events);
+```
+
+---
+
+## Listening to Events
+
+```typescript
+import { EventBus, CoreEvents } from 'calendar';
+
+const eventBus = app.resolveType<EventBus>();
+
+// Subscribe to event updates
+eventBus.on(CoreEvents.EVENT_UPDATED, (e: Event) => {
+  const { eventId, sourceColumnKey, targetColumnKey } = (e as CustomEvent).detail;
+  console.log(`Event ${eventId} moved from ${sourceColumnKey} to ${targetColumnKey}`);
+});
+
+// Subscribe to drag events
+eventBus.on(CoreEvents.EVENT_DRAG_END, (e: Event) => {
+  const { swpEvent, target } = (e as CustomEvent).detail;
+  console.log(`Dropped on ${target}:`, swpEvent);
+});
+
+// One-time listener
+eventBus.once(CoreEvents.READY, () => {
+  console.log('Calendar is ready!');
+});
+```
+
+---
+
+## CSS Customization
+
+The calendar uses CSS custom properties for theming. Override these in your CSS:
+
+```css
+:root {
+  --calendar-hour-height: 64px;
+  --calendar-header-height: 48px;
+  --calendar-column-min-width: 120px;
+  --calendar-event-border-radius: 4px;
+}
+```
+
+---
+
+## Dependencies
+
+- `@novadi/core` - Dependency injection framework (peer dependency)
+- `dayjs` - Date manipulation and formatting
+
+---
+
+## License
+
+Proprietary - SWP

packages/calendar/build.js

@@ -0,0 +1,47 @@
+import * as esbuild from 'esbuild';
+import { NovadiUnplugin } from '@novadi/core/unplugin';
+import * as fs from 'fs';
+import * as path from 'path';
+
+const entryPoints = [
+  'src/index.ts',
+  'src/extensions/teams/index.ts',
+  'src/extensions/departments/index.ts',
+  'src/extensions/bookings/index.ts',
+  'src/extensions/customers/index.ts',
+  'src/extensions/schedules/index.ts',
+  'src/extensions/audit/index.ts'
+];
+
+async function build() {
+  await esbuild.build({
+    entryPoints,
+    bundle: true,
+    outdir: 'dist',
+    format: 'esm',
+    platform: 'browser',
+    external: ['@novadi/core', 'dayjs'],
+    splitting: true,
+    sourcemap: true,
+    target: 'es2020',
+    plugins: [NovadiUnplugin.esbuild({ debug: false, enableAutowiring: true })]
+  });
+
+  console.log('Build complete: dist/');
+
+  // Bundle CSS
+  const cssDir = 'dist/css';
+  if (!fs.existsSync(cssDir)) {
+    fs.mkdirSync(cssDir, { recursive: true });
+  }
+  const cssFiles = [
+    '../../wwwroot/css/calendar-base.css',
+    '../../wwwroot/css/calendar-layout.css',
+    '../../wwwroot/css/calendar-events.css'
+  ];
+  const bundledCss = cssFiles.map(f => fs.readFileSync(f, 'utf8')).join('\n');
+  fs.writeFileSync(path.join(cssDir, 'calendar.css'), bundledCss);
+  console.log('CSS bundled: dist/css/calendar.css');
+}
+
+build();

packages/calendar/package-lock.json

@@ -0,0 +1,167 @@
+{
+  "name": "@plantempus/calendar",
+  "version": "0.1.0",
+  "lockfileVersion": 3,
+  "requires": true,
+  "packages": {
+    "": {
+      "name": "@plantempus/calendar",
+      "version": "0.1.0",
+      "dependencies": {
+        "dayjs": "^1.11.0"
+      },
+      "peerDependencies": {
+        "@novadi/core": "^0.6.0"
+      }
+    },
+    "node_modules/@jridgewell/gen-mapping": {
+      "version": "0.3.13",
+      "resolved": "https://registry.npmjs.org/@jridgewell/gen-mapping/-/gen-mapping-0.3.13.tgz",
+      "integrity": "sha512-2kkt/7niJ6MgEPxF0bYdQ6etZaA+fQvDcLKckhy1yIQOzaoKjBBjSj63/aLVjYE3qhRt5dvM+uUyfCg6UKCBbA==",
+      "license": "MIT",
+      "peer": true,
+      "dependencies": {
+        "@jridgewell/sourcemap-codec": "^1.5.0",
+        "@jridgewell/trace-mapping": "^0.3.24"
+      }
+    },
+    "node_modules/@jridgewell/remapping": {
+      "version": "2.3.5",
+      "resolved": "https://registry.npmjs.org/@jridgewell/remapping/-/remapping-2.3.5.tgz",
+      "integrity": "sha512-LI9u/+laYG4Ds1TDKSJW2YPrIlcVYOwi2fUC6xB43lueCjgxV4lffOCZCtYFiH6TNOX+tQKXx97T4IKHbhyHEQ==",
+      "license": "MIT",
+      "peer": true,
+      "dependencies": {
+        "@jridgewell/gen-mapping": "^0.3.5",
+        "@jridgewell/trace-mapping": "^0.3.24"
+      }
+    },
+    "node_modules/@jridgewell/resolve-uri": {
+      "version": "3.1.2",
+      "resolved": "https://registry.npmjs.org/@jridgewell/resolve-uri/-/resolve-uri-3.1.2.tgz",
+      "integrity": "sha512-bRISgCIjP20/tbWSPWMEi54QVPRZExkuD9lJL+UIxUKtwVJA8wW1Trb1jMs1RFXo1CBTNZ/5hpC9QvmKWdopKw==",
+      "license": "MIT",
+      "peer": true,
+      "engines": {
+        "node": ">=6.0.0"
+      }
+    },
+    "node_modules/@jridgewell/sourcemap-codec": {
+      "version": "1.5.5",
+      "resolved": "https://registry.npmjs.org/@jridgewell/sourcemap-codec/-/sourcemap-codec-1.5.5.tgz",
+      "integrity": "sha512-cYQ9310grqxueWbl+WuIUIaiUaDcj7WOq5fVhEljNVgRfOUhY9fy2zTvfoqWsnebh8Sl70VScFbICvJnLKB0Og==",
+      "license": "MIT",
+      "peer": true
+    },
+    "node_modules/@jridgewell/trace-mapping": {
+      "version": "0.3.31",
+      "resolved": "https://registry.npmjs.org/@jridgewell/trace-mapping/-/trace-mapping-0.3.31.tgz",
+      "integrity": "sha512-zzNR+SdQSDJzc8joaeP8QQoCQr8NuYx2dIIytl1QeBEZHJ9uW6hebsrYgbz8hJwUQao3TWCMtmfV8Nu1twOLAw==",
+      "license": "MIT",
+      "peer": true,
+      "dependencies": {
+        "@jridgewell/resolve-uri": "^3.1.0",
+        "@jridgewell/sourcemap-codec": "^1.4.14"
+      }
+    },
+    "node_modules/@novadi/core": {
+      "version": "0.6.0",
+      "resolved": "https://registry.npmjs.org/@novadi/core/-/core-0.6.0.tgz",
+      "integrity": "sha512-CU1134Nd7ULMg9OQbID5oP+FLtrMkNiLJ17+dmy4jjmPDcPK/dVzKTFxvJmbBvEfZEc9WtmkmJjqw11ABU7Jxw==",
+      "license": "MIT",
+      "peer": true,
+      "dependencies": {
+        "unplugin": "^2.3.10"
+      },
+      "optionalDependencies": {
+        "@rollup/rollup-win32-x64-msvc": "^4.52.5"
+      },
+      "peerDependencies": {
+        "typescript": ">=5.0.0"
+      }
+    },
+    "node_modules/@rollup/rollup-win32-x64-msvc": {
+      "version": "4.56.0",
+      "resolved": "https://registry.npmjs.org/@rollup/rollup-win32-x64-msvc/-/rollup-win32-x64-msvc-4.56.0.tgz",
+      "integrity": "sha512-H8AE9Ur/t0+1VXujj90w0HrSOuv0Nq9r1vSZF2t5km20NTfosQsGGUXDaKdQZzwuLts7IyL1fYT4hM95TI9c4g==",
+      "cpu": [
+        "x64"
+      ],
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "win32"
+      ],
+      "peer": true
+    },
+    "node_modules/acorn": {
+      "version": "8.15.0",
+      "resolved": "https://registry.npmjs.org/acorn/-/acorn-8.15.0.tgz",
+      "integrity": "sha512-NZyJarBfL7nWwIq+FDL6Zp/yHEhePMNnnJ0y3qfieCrmNvYct8uvtiV41UvlSe6apAfk0fY1FbWx+NwfmpvtTg==",
+      "license": "MIT",
+      "peer": true,
+      "bin": {
+        "acorn": "bin/acorn"
+      },
+      "engines": {
+        "node": ">=0.4.0"
+      }
+    },
+    "node_modules/dayjs": {
+      "version": "1.11.19",
+      "resolved": "https://registry.npmjs.org/dayjs/-/dayjs-1.11.19.tgz",
+      "integrity": "sha512-t5EcLVS6QPBNqM2z8fakk/NKel+Xzshgt8FFKAn+qwlD1pzZWxh0nVCrvFK7ZDb6XucZeF9z8C7CBWTRIVApAw==",
+      "license": "MIT"
+    },
+    "node_modules/picomatch": {
+      "version": "4.0.3",
+      "resolved": "https://registry.npmjs.org/picomatch/-/picomatch-4.0.3.tgz",
+      "integrity": "sha512-5gTmgEY/sqK6gFXLIsQNH19lWb4ebPDLA4SdLP7dsWkIXHWlG66oPuVvXSGFPppYZz8ZDZq0dYYrbHfBCVUb1Q==",
+      "license": "MIT",
+      "peer": true,
+      "engines": {
+        "node": ">=12"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/jonschlinkert"
+      }
+    },
+    "node_modules/typescript": {
+      "version": "5.9.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.9.3.tgz",
+      "integrity": "sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw==",
+      "license": "Apache-2.0",
+      "peer": true,
+      "bin": {
+        "tsc": "bin/tsc",
+        "tsserver": "bin/tsserver"
+      },
+      "engines": {
+        "node": ">=14.17"
+      }
+    },
+    "node_modules/unplugin": {
+      "version": "2.3.11",
+      "resolved": "https://registry.npmjs.org/unplugin/-/unplugin-2.3.11.tgz",
+      "integrity": "sha512-5uKD0nqiYVzlmCRs01Fhs2BdkEgBS3SAVP6ndrBsuK42iC2+JHyxM05Rm9G8+5mkmRtzMZGY8Ct5+mliZxU/Ww==",
+      "license": "MIT",
+      "peer": true,
+      "dependencies": {
+        "@jridgewell/remapping": "^2.3.5",
+        "acorn": "^8.15.0",
+        "picomatch": "^4.0.3",
+        "webpack-virtual-modules": "^0.6.2"
+      },
+      "engines": {
+        "node": ">=18.12.0"
+      }
+    },
+    "node_modules/webpack-virtual-modules": {
+      "version": "0.6.2",
+      "resolved": "https://registry.npmjs.org/webpack-virtual-modules/-/webpack-virtual-modules-0.6.2.tgz",
+      "integrity": "sha512-66/V2i5hQanC51vBQKPH4aI8NMAcBW59FVBs+rC7eGHupMyfn34q7rZIE+ETlJ+XTevqfUhVVBgSUNSW2flEUQ==",
+      "license": "MIT",
+      "peer": true
+    }
+  }
+}

packages/calendar/package.json

@@ -0,0 +1,57 @@
+{
+  "name": "calendar",
+  "version": "0.1.7",
+  "description": "Calendar library",
+  "author": "SWP",
+  "type": "module",
+  "main": "./dist/index.js",
+  "types": "./dist/index.d.ts",
+  "exports": {
+    ".": {
+      "import": "./dist/index.js",
+      "types": "./dist/index.d.ts"
+    },
+    "./teams": {
+      "import": "./dist/extensions/teams/index.js",
+      "types": "./dist/extensions/teams/index.d.ts"
+    },
+    "./departments": {
+      "import": "./dist/extensions/departments/index.js",
+      "types": "./dist/extensions/departments/index.d.ts"
+    },
+    "./bookings": {
+      "import": "./dist/extensions/bookings/index.js",
+      "types": "./dist/extensions/bookings/index.d.ts"
+    },
+    "./customers": {
+      "import": "./dist/extensions/customers/index.js",
+      "types": "./dist/extensions/customers/index.d.ts"
+    },
+    "./schedules": {
+      "import": "./dist/extensions/schedules/index.js",
+      "types": "./dist/extensions/schedules/index.d.ts"
+    },
+    "./audit": {
+      "import": "./dist/extensions/audit/index.js",
+      "types": "./dist/extensions/audit/index.d.ts"
+    },
+    "./styles": "./dist/css/calendar.css"
+  },
+  "files": [
+    "dist"
+  ],
+  "scripts": {
+    "build": "node build.js && npm run build:types",
+    "build:types": "tsc --emitDeclarationOnly --outDir dist"
+  },
+  "peerDependencies": {
+    "@novadi/core": "^0.6.0"
+  },
+  "dependencies": {
+    "dayjs": "^1.11.0"
+  },
+  "devDependencies": {
+    "esbuild": "^0.24.0",
+    "typescript": "^5.0.0"
+  }
+}

packages/calendar/src/CompositionRoot.ts

@@ -0,0 +1,163 @@
+import { Container, Builder } from '@novadi/core';
+
+// Core
+import { EventBus } from './core/EventBus';
+import { DateService } from './core/DateService';
+import { CalendarOrchestrator } from './core/CalendarOrchestrator';
+import { CalendarApp } from './core/CalendarApp';
+import { TimeAxisRenderer } from './features/timeaxis/TimeAxisRenderer';
+import { ScrollManager } from './core/ScrollManager';
+import { HeaderDrawerManager } from './core/HeaderDrawerManager';
+import { ITimeFormatConfig } from './core/ITimeFormatConfig';
+import { IGridConfig } from './core/IGridConfig';
+
+// Types
+import { IEventBus, ICalendarEvent, ISync, IResource } from './types/CalendarTypes';
+import { TenantSetting } from './types/SettingsTypes';
+import { ViewConfig } from './core/ViewConfig';
+
+// Renderers
+import { IRenderer } from './core/IGroupingRenderer';
+import { DateRenderer } from './features/date/DateRenderer';
+import { ResourceRenderer } from './features/resource/ResourceRenderer';
+import { EventRenderer } from './features/event/EventRenderer';
+import { ScheduleRenderer } from './features/schedule/ScheduleRenderer';
+import { HeaderDrawerRenderer } from './features/headerdrawer/HeaderDrawerRenderer';
+
+// Storage
+import { IndexedDBContext, IDBConfig, defaultDBConfig } from './storage/IndexedDBContext';
+import { IStore } from './storage/IStore';
+import { IEntityService } from './storage/IEntityService';
+import { EventStore } from './storage/events/EventStore';
+import { EventService } from './storage/events/EventService';
+import { ResourceStore } from './storage/resources/ResourceStore';
+import { ResourceService } from './storage/resources/ResourceService';
+import { SettingsStore } from './storage/settings/SettingsStore';
+import { SettingsService } from './storage/settings/SettingsService';
+import { ViewConfigStore } from './storage/viewconfigs/ViewConfigStore';
+import { ViewConfigService } from './storage/viewconfigs/ViewConfigService';
+
+// Managers
+import { DragDropManager } from './managers/DragDropManager';
+import { EdgeScrollManager } from './managers/EdgeScrollManager';
+import { ResizeManager } from './managers/ResizeManager';
+import { EventPersistenceManager } from './managers/EventPersistenceManager';
+
+/**
+ * Default configuration values
+ */
+export const defaultTimeFormatConfig: ITimeFormatConfig = {
+  timezone: Intl.DateTimeFormat().resolvedOptions().timeZone,
+  use24HourFormat: true,
+  locale: 'da-DK',
+  dateFormat: 'locale',
+  showSeconds: false
+};
+
+export const defaultGridConfig: IGridConfig = {
+  hourHeight: 64,
+  dayStartHour: 6,
+  dayEndHour: 18,
+  snapInterval: 15,
+  gridStartThresholdMinutes: 30
+};
+
+/**
+ * Calendar configuration options
+ */
+export interface ICalendarOptions {
+  timeConfig?: ITimeFormatConfig;
+  gridConfig?: IGridConfig;
+  dbConfig?: IDBConfig;
+}
+
+/**
+ * Creates a configured DI container with all core calendar services registered.
+ * Call this to get a ready-to-use container for the calendar.
+ *
+ * @param options - Optional calendar configuration options
+ * @returns Configured Container instance
+ */
+export function createCalendarContainer(options?: ICalendarOptions): Container {
+  const container = new Container();
+  const builder = container.builder();
+
+  registerCoreServices(builder, options);
+
+  return builder.build();
+}
+
+/**
+ * Registers all core calendar services with the DI container builder.
+ * Use this when you need to customize the container or add extensions.
+ *
+ * @param builder - ContainerBuilder to register services with
+ * @param options - Optional calendar configuration options
+ */
+export function registerCoreServices(
+  builder: Builder,
+  options?: ICalendarOptions
+): void {
+  const timeConfig = options?.timeConfig ?? defaultTimeFormatConfig;
+  const gridConfig = options?.gridConfig ?? defaultGridConfig;
+  const dbConfig = options?.dbConfig ?? defaultDBConfig;
+  // Configuration instances
+  builder.registerInstance(timeConfig).as<ITimeFormatConfig>();
+  builder.registerInstance(gridConfig).as<IGridConfig>();
+  builder.registerInstance(dbConfig).as<IDBConfig>();
+
+  // Core - EventBus (singleton pattern via dual registration)
+  builder.registerType(EventBus).as<EventBus>();
+  builder.registerType(EventBus).as<IEventBus>();
+
+  // Core Services
+  builder.registerType(DateService).as<DateService>();
+
+  // Storage infrastructure
+  builder.registerType(IndexedDBContext).as<IndexedDBContext>();
+
+  // Core Stores (for IndexedDB schema creation via IStore[] array injection)
+  builder.registerType(EventStore).as<IStore>();
+  builder.registerType(ResourceStore).as<IStore>();
+  builder.registerType(SettingsStore).as<IStore>();
+  builder.registerType(ViewConfigStore).as<IStore>();
+
+  // Core Entity Services (polymorphic via IEntityService<T>)
+  builder.registerType(EventService).as<IEntityService<ICalendarEvent>>();
+  builder.registerType(EventService).as<IEntityService<ISync>>();
+  builder.registerType(EventService).as<EventService>();
+
+  builder.registerType(ResourceService).as<IEntityService<IResource>>();
+  builder.registerType(ResourceService).as<IEntityService<ISync>>();
+  builder.registerType(ResourceService).as<ResourceService>();
+
+  builder.registerType(SettingsService).as<IEntityService<TenantSetting>>();
+  builder.registerType(SettingsService).as<IEntityService<ISync>>();
+  builder.registerType(SettingsService).as<SettingsService>();
+
+  builder.registerType(ViewConfigService).as<IEntityService<ViewConfig>>();
+  builder.registerType(ViewConfigService).as<IEntityService<ISync>>();
+  builder.registerType(ViewConfigService).as<ViewConfigService>();
+
+  // Core Renderers
+  builder.registerType(EventRenderer).as<EventRenderer>();
+  builder.registerType(ScheduleRenderer).as<ScheduleRenderer>();
+  builder.registerType(HeaderDrawerRenderer).as<HeaderDrawerRenderer>();
+  builder.registerType(TimeAxisRenderer).as<TimeAxisRenderer>();
+
+  // Grouping Renderers (registered as IRenderer[] for CalendarOrchestrator)
+  builder.registerType(DateRenderer).as<IRenderer>();
+  builder.registerType(ResourceRenderer).as<IRenderer>();
+
+  // Core Managers
+  builder.registerType(ScrollManager).as<ScrollManager>();
+  builder.registerType(HeaderDrawerManager).as<HeaderDrawerManager>();
+  builder.registerType(DragDropManager).as<DragDropManager>();
+  builder.registerType(EdgeScrollManager).as<EdgeScrollManager>();
+  builder.registerType(ResizeManager).as<ResizeManager>();
+  builder.registerType(EventPersistenceManager).as<EventPersistenceManager>();
+
+  // Orchestrator and App
+  builder.registerType(CalendarOrchestrator).as<CalendarOrchestrator>();
+  builder.registerType(CalendarApp).as<CalendarApp>();
+}

packages/calendar/src/constants/CoreEvents.ts

@@ -0,0 +1,71 @@
+/**
+ * CoreEvents - Consolidated essential events for the calendar
+ */
+export const CoreEvents = {
+  // Lifecycle events
+  INITIALIZED: 'core:initialized',
+  READY: 'core:ready',
+  DESTROYED: 'core:destroyed',
+
+  // View events
+  VIEW_CHANGED: 'view:changed',
+  VIEW_RENDERED: 'view:rendered',
+
+  // Navigation events
+  DATE_CHANGED: 'nav:date-changed',
+  NAVIGATION_COMPLETED: 'nav:navigation-completed',
+
+  // Data events
+  DATA_LOADING: 'data:loading',
+  DATA_LOADED: 'data:loaded',
+  DATA_ERROR: 'data:error',
+
+  // Grid events
+  GRID_RENDERED: 'grid:rendered',
+  GRID_CLICKED: 'grid:clicked',
+
+  // Event management
+  EVENT_CREATED: 'event:created',
+  EVENT_UPDATED: 'event:updated',
+  EVENT_DELETED: 'event:deleted',
+  EVENT_SELECTED: 'event:selected',
+
+  // Event drag-drop
+  EVENT_DRAG_START: 'event:drag-start',
+  EVENT_DRAG_MOVE: 'event:drag-move',
+  EVENT_DRAG_END: 'event:drag-end',
+  EVENT_DRAG_CANCEL: 'event:drag-cancel',
+  EVENT_DRAG_COLUMN_CHANGE: 'event:drag-column-change',
+
+  // Header drag (timed → header conversion)
+  EVENT_DRAG_ENTER_HEADER: 'event:drag-enter-header',
+  EVENT_DRAG_MOVE_HEADER: 'event:drag-move-header',
+  EVENT_DRAG_LEAVE_HEADER: 'event:drag-leave-header',
+
+  // Event resize
+  EVENT_RESIZE_START: 'event:resize-start',
+  EVENT_RESIZE_END: 'event:resize-end',
+
+  // Edge scroll
+  EDGE_SCROLL_TICK: 'edge-scroll:tick',
+  EDGE_SCROLL_STARTED: 'edge-scroll:started',
+  EDGE_SCROLL_STOPPED: 'edge-scroll:stopped',
+
+  // System events
+  ERROR: 'system:error',
+
+  // Sync events
+  SYNC_STARTED: 'sync:started',
+  SYNC_COMPLETED: 'sync:completed',
+  SYNC_FAILED: 'sync:failed',
+
+  // Entity events - for audit and sync
+  ENTITY_SAVED: 'entity:saved',
+  ENTITY_DELETED: 'entity:deleted',
+
+  // Audit events
+  AUDIT_LOGGED: 'audit:logged',
+
+  // Rendering events
+  EVENTS_RENDERED: 'events:rendered'
+} as const;

packages/calendar/src/core/BaseGroupingRenderer.ts

@@ -0,0 +1,91 @@
+import { IRenderer, IRenderContext } from './IGroupingRenderer';
+
+/**
+ * Entity must have id
+ */
+export interface IGroupingEntity {
+  id: string;
+}
+
+/**
+ * Configuration for a grouping renderer
+ */
+export interface IGroupingRendererConfig {
+  elementTag: string;      // e.g., 'swp-team-header'
+  idAttribute: string;     // e.g., 'teamId' -> data-team-id
+  colspanVar: string;      // e.g., '--team-cols'
+}
+
+/**
+ * Abstract base class for grouping renderers
+ *
+ * Handles:
+ * - Fetching entities by IDs
+ * - Calculating colspan from parentChildMap
+ * - Creating header elements
+ * - Appending to container
+ *
+ * Subclasses override:
+ * - renderHeader() for custom content
+ * - getDisplayName() for entity display text
+ */
+export abstract class BaseGroupingRenderer<T extends IGroupingEntity> implements IRenderer {
+  abstract readonly type: string;
+  protected abstract readonly config: IGroupingRendererConfig;
+
+  /**
+   * Fetch entities from service
+   */
+  protected abstract getEntities(ids: string[]): Promise<T[]>;
+
+  /**
+   * Get display name for entity
+   */
+  protected abstract getDisplayName(entity: T): string;
+
+  /**
+   * Main render method - handles common logic
+   */
+  async render(context: IRenderContext): Promise<void> {
+    const allowedIds = context.filter[this.type] || [];
+    if (allowedIds.length === 0) return;
+
+    const entities = await this.getEntities(allowedIds);
+    const dateCount = context.filter['date']?.length || 1;
+    const childIds = context.childType ? context.filter[context.childType] || [] : [];
+
+    for (const entity of entities) {
+      const entityChildIds = context.parentChildMap?.[entity.id] || [];
+      const childCount = entityChildIds.filter(id => childIds.includes(id)).length;
+      const colspan = childCount * dateCount;
+
+      const header = document.createElement(this.config.elementTag);
+      header.dataset[this.config.idAttribute] = entity.id;
+      header.style.setProperty(this.config.colspanVar, String(colspan));
+
+      // Allow subclass to customize header content
+      this.renderHeader(entity, header, context);
+
+      context.headerContainer.appendChild(header);
+    }
+  }
+
+  /**
+   * Override this method for custom header rendering
+   * Default: just sets textContent to display name
+   */
+  protected renderHeader(entity: T, header: HTMLElement, _context: IRenderContext): void {
+    header.textContent = this.getDisplayName(entity);
+  }
+
+  /**
+   * Helper to render a single entity header.
+   * Can be used by subclasses that override render() but want consistent header creation.
+   */
+  protected createHeader(entity: T, context: IRenderContext): HTMLElement {
+    const header = document.createElement(this.config.elementTag);
+    header.dataset[this.config.idAttribute] = entity.id;
+    this.renderHeader(entity, header, context);
+    return header;
+  }
+}

packages/calendar/src/core/CalendarApp.ts

@@ -0,0 +1,201 @@
+import { CalendarOrchestrator } from './CalendarOrchestrator';
+import { TimeAxisRenderer } from '../features/timeaxis/TimeAxisRenderer';
+import { NavigationAnimator } from './NavigationAnimator';
+import { DateService } from './DateService';
+import { ScrollManager } from './ScrollManager';
+import { HeaderDrawerManager } from './HeaderDrawerManager';
+import { ViewConfig } from './ViewConfig';
+import { DragDropManager } from '../managers/DragDropManager';
+import { EdgeScrollManager } from '../managers/EdgeScrollManager';
+import { ResizeManager } from '../managers/ResizeManager';
+import { EventPersistenceManager } from '../managers/EventPersistenceManager';
+import { HeaderDrawerRenderer } from '../features/headerdrawer/HeaderDrawerRenderer';
+import { SettingsService } from '../storage/settings/SettingsService';
+import { ViewConfigService } from '../storage/viewconfigs/ViewConfigService';
+import { IWorkweekPreset } from '../types/SettingsTypes';
+import { IEventBus } from '../types/CalendarTypes';
+import {
+  CalendarEvents,
+  RenderPayload,
+  WorkweekChangePayload,
+  ViewUpdatePayload
+} from './CalendarEvents';
+
+export class CalendarApp {
+  private animator!: NavigationAnimator;
+  private container!: HTMLElement;
+  private dayOffset = 0;
+  private currentViewId = 'simple';
+  private workweekPreset: IWorkweekPreset | null = null;
+  private groupingOverrides: Map<string, string[]> = new Map();
+
+  constructor(
+    private orchestrator: CalendarOrchestrator,
+    private timeAxisRenderer: TimeAxisRenderer,
+    private dateService: DateService,
+    private scrollManager: ScrollManager,
+    private headerDrawerManager: HeaderDrawerManager,
+    private dragDropManager: DragDropManager,
+    private edgeScrollManager: EdgeScrollManager,
+    private resizeManager: ResizeManager,
+    private headerDrawerRenderer: HeaderDrawerRenderer,
+    private eventPersistenceManager: EventPersistenceManager,
+    private settingsService: SettingsService,
+    private viewConfigService: ViewConfigService,
+    private eventBus: IEventBus
+  ) {}
+
+  async init(container: HTMLElement): Promise<void> {
+    this.container = container;
+
+    // Load settings
+    const gridSettings = await this.settingsService.getGridSettings();
+    if (!gridSettings) {
+      throw new Error('GridSettings not found');
+    }
+
+    this.workweekPreset = await this.settingsService.getDefaultWorkweekPreset();
+
+    // Create NavigationAnimator with DOM elements
+    this.animator = new NavigationAnimator(
+      container.querySelector('swp-header-track') as HTMLElement,
+      container.querySelector('swp-content-track') as HTMLElement,
+      container.querySelector('swp-header-drawer')
+    );
+
+    // Render time axis from settings
+    this.timeAxisRenderer.render(
+      container.querySelector('#time-axis') as HTMLElement,
+      gridSettings.dayStartHour,
+      gridSettings.dayEndHour
+    );
+
+    // Init managers
+    this.scrollManager.init(container);
+    this.headerDrawerManager.init(container);
+    this.dragDropManager.init(container);
+    this.resizeManager.init(container);
+
+    const scrollableContent = container.querySelector('swp-scrollable-content') as HTMLElement;
+    this.edgeScrollManager.init(scrollableContent);
+
+    // Setup command event listeners
+    this.setupEventListeners();
+
+    // Emit ready status
+    this.emitStatus('ready');
+  }
+
+  private setupEventListeners(): void {
+    // Navigation commands via EventBus
+    this.eventBus.on(CalendarEvents.CMD_NAVIGATE_PREV, () => {
+      this.handleNavigatePrev();
+    });
+
+    this.eventBus.on(CalendarEvents.CMD_NAVIGATE_NEXT, () => {
+      this.handleNavigateNext();
+    });
+
+    // Drawer toggle via EventBus
+    this.eventBus.on(CalendarEvents.CMD_DRAWER_TOGGLE, () => {
+      this.headerDrawerManager.toggle();
+    });
+
+    // Render command via EventBus
+    this.eventBus.on(CalendarEvents.CMD_RENDER, (e: Event) => {
+      const { viewId } = (e as CustomEvent<RenderPayload>).detail;
+      this.handleRenderCommand(viewId);
+    });
+
+    // Workweek change via EventBus
+    this.eventBus.on(CalendarEvents.CMD_WORKWEEK_CHANGE, (e: Event) => {
+      const { presetId } = (e as CustomEvent<WorkweekChangePayload>).detail;
+      this.handleWorkweekChange(presetId);
+    });
+
+    // View update via EventBus
+    this.eventBus.on(CalendarEvents.CMD_VIEW_UPDATE, (e: Event) => {
+      const { type, values } = (e as CustomEvent<ViewUpdatePayload>).detail;
+      this.handleViewUpdate(type, values);
+    });
+  }
+
+  private async handleRenderCommand(viewId: string): Promise<void> {
+    this.currentViewId = viewId;
+    await this.render();
+    this.emitStatus('rendered', { viewId });
+  }
+
+  private async handleNavigatePrev(): Promise<void> {
+    const step = this.workweekPreset?.periodDays ?? 7;
+    this.dayOffset -= step;
+    await this.animator.slide('right', () => this.render());
+    this.emitStatus('rendered', { viewId: this.currentViewId });
+  }
+
+  private async handleNavigateNext(): Promise<void> {
+    const step = this.workweekPreset?.periodDays ?? 7;
+    this.dayOffset += step;
+    await this.animator.slide('left', () => this.render());
+    this.emitStatus('rendered', { viewId: this.currentViewId });
+  }
+
+  private async handleWorkweekChange(presetId: string): Promise<void> {
+    const preset = await this.settingsService.getWorkweekPreset(presetId);
+    if (preset) {
+      this.workweekPreset = preset;
+      await this.render();
+      this.emitStatus('rendered', { viewId: this.currentViewId });
+    }
+  }
+
+  private async handleViewUpdate(type: string, values: string[]): Promise<void> {
+    this.groupingOverrides.set(type, values);
+    await this.render();
+    this.emitStatus('rendered', { viewId: this.currentViewId });
+  }
+
+  private async render(): Promise<void> {
+    const storedConfig = await this.viewConfigService.getById(this.currentViewId);
+    if (!storedConfig) {
+      this.emitStatus('error', { message: `ViewConfig not found: ${this.currentViewId}` });
+      return;
+    }
+
+    // Populate date values based on workweek preset and day offset
+    const workDays = this.workweekPreset?.workDays || [1, 2, 3, 4, 5];
+    const periodDays = this.workweekPreset?.periodDays ?? 7;
+
+    // For single-day navigation (periodDays=1), show consecutive days from offset
+    // For week navigation (periodDays=7), show workDays from the week containing offset
+    const dates = periodDays === 1
+      ? this.dateService.getDatesFromOffset(this.dayOffset, workDays.length)
+      : this.dateService.getWorkDaysFromOffset(this.dayOffset, workDays);
+
+    // Clone config and apply overrides
+    const viewConfig: ViewConfig = {
+      ...storedConfig,
+      groupings: storedConfig.groupings.map(g => {
+        // Apply date values
+        if (g.type === 'date') {
+          return { ...g, values: dates };
+        }
+        // Apply grouping overrides
+        const override = this.groupingOverrides.get(g.type);
+        if (override) {
+          return { ...g, values: override };
+        }
+        return g;
+      })
+    };
+
+    await this.orchestrator.render(viewConfig, this.container);
+  }
+
+  private emitStatus(status: string, detail?: object): void {
+    this.container.dispatchEvent(new CustomEvent(`calendar:status:${status}`, {
+      detail,
+      bubbles: true
+    }));
+  }
+}

packages/calendar/src/core/CalendarEvents.ts

@@ -0,0 +1,28 @@
+/**
+ * CalendarEvents - Command and status events for CalendarApp
+ */
+export const CalendarEvents = {
+  // Command events (host → calendar)
+  CMD_NAVIGATE_PREV: 'calendar:cmd:navigate:prev',
+  CMD_NAVIGATE_NEXT: 'calendar:cmd:navigate:next',
+  CMD_DRAWER_TOGGLE: 'calendar:cmd:drawer:toggle',
+  CMD_RENDER: 'calendar:cmd:render',
+  CMD_WORKWEEK_CHANGE: 'calendar:cmd:workweek:change',
+  CMD_VIEW_UPDATE: 'calendar:cmd:view:update'
+} as const;
+
+/**
+ * Payload interfaces for CalendarEvents
+ */
+export interface RenderPayload {
+  viewId: string;
+}
+
+export interface WorkweekChangePayload {
+  presetId: string;
+}
+
+export interface ViewUpdatePayload {
+  type: string;
+  values: string[];
+}

packages/calendar/src/core/CalendarOrchestrator.ts

@@ -0,0 +1,124 @@
+import { IRenderer, IRenderContext } from './IGroupingRenderer';
+import { buildPipeline } from './RenderBuilder';
+import { EventRenderer } from '../features/event/EventRenderer';
+import { ScheduleRenderer } from '../features/schedule/ScheduleRenderer';
+import { HeaderDrawerRenderer } from '../features/headerdrawer/HeaderDrawerRenderer';
+import { ViewConfig, GroupingConfig } from './ViewConfig';
+import { FilterTemplate } from './FilterTemplate';
+import { DateService } from './DateService';
+import { IEntityService } from '../storage/IEntityService';
+import { ISync } from '../types/CalendarTypes';
+
+export class CalendarOrchestrator {
+  constructor(
+    private allRenderers: IRenderer[],
+    private eventRenderer: EventRenderer,
+    private scheduleRenderer: ScheduleRenderer,
+    private headerDrawerRenderer: HeaderDrawerRenderer,
+    private dateService: DateService,
+    private entityServices: IEntityService<ISync>[]
+  ) {}
+
+  async render(viewConfig: ViewConfig, container: HTMLElement): Promise<void> {
+    const headerContainer = container.querySelector('swp-calendar-header') as HTMLElement;
+    const columnContainer = container.querySelector('swp-day-columns') as HTMLElement;
+    if (!headerContainer || !columnContainer) {
+      throw new Error('Missing swp-calendar-header or swp-day-columns');
+    }
+
+    // Byg filter fra viewConfig
+    const filter: Record<string, string[]> = {};
+    for (const grouping of viewConfig.groupings) {
+      filter[grouping.type] = grouping.values;
+    }
+
+    // Byg FilterTemplate fra viewConfig groupings (kun de med idProperty)
+    const filterTemplate = new FilterTemplate(this.dateService);
+    for (const grouping of viewConfig.groupings) {
+      if (grouping.idProperty) {
+        filterTemplate.addField(grouping.idProperty, grouping.derivedFrom);
+      }
+    }
+
+    // Resolve belongsTo relations (e.g., team.resourceIds)
+    const { parentChildMap, childType } = await this.resolveBelongsTo(viewConfig.groupings, filter);
+
+    const context: IRenderContext = { headerContainer, columnContainer, filter, groupings: viewConfig.groupings, parentChildMap, childType };
+
+    // Clear
+    headerContainer.innerHTML = '';
+    columnContainer.innerHTML = '';
+
+    // Sæt data-levels attribut for CSS grid-row styling
+    const levels = viewConfig.groupings.map(g => g.type).join(' ');
+    headerContainer.dataset.levels = levels;
+
+    // Vælg renderers baseret på groupings types
+    const activeRenderers = this.selectRenderers(viewConfig);
+
+    // Byg og kør pipeline
+    const pipeline = buildPipeline(activeRenderers);
+    await pipeline.run(context);
+
+    // Render schedule unavailable zones (før events)
+    await this.scheduleRenderer.render(container, filter);
+
+    // Render timed events in grid (med filterTemplate til matching)
+    await this.eventRenderer.render(container, filter, filterTemplate);
+
+    // Render allDay events in header drawer (med filterTemplate til matching)
+    await this.headerDrawerRenderer.render(container, filter, filterTemplate);
+  }
+
+  private selectRenderers(viewConfig: ViewConfig): IRenderer[] {
+    const types = viewConfig.groupings.map(g => g.type);
+    // Sortér renderers i samme rækkefølge som viewConfig.groupings
+    return types
+      .map(type => this.allRenderers.find(r => r.type === type))
+      .filter((r): r is IRenderer => r !== undefined);
+  }
+
+  /**
+   * Resolve belongsTo relations to build parent-child map
+   * e.g., belongsTo: 'team.resourceIds' → { team1: ['EMP001', 'EMP002'], team2: [...] }
+   * Also returns the childType (the grouping type that has belongsTo)
+   */
+  private async resolveBelongsTo(
+    groupings: GroupingConfig[],
+    filter: Record<string, string[]>
+  ): Promise<{ parentChildMap?: Record<string, string[]>; childType?: string }> {
+    // Find grouping with belongsTo
+    const childGrouping = groupings.find(g => g.belongsTo);
+    if (!childGrouping?.belongsTo) return {};
+
+    // Parse belongsTo: 'team.resourceIds'
+    const [entityType, property] = childGrouping.belongsTo.split('.');
+    if (!entityType || !property) return {};
+
+    // Get parent IDs from filter
+    const parentIds = filter[entityType] || [];
+    if (parentIds.length === 0) return {};
+
+    // Find service dynamisk baseret på entityType (ingen hardcoded type check)
+    const service = this.entityServices.find(s =>
+      s.entityType.toLowerCase() === entityType
+    );
+    if (!service) return {};
+
+    // Hent alle entities og filtrer på parentIds
+    const allEntities = await service.getAll();
+    const entities = allEntities.filter(e =>
+      parentIds.includes((e as unknown as Record<string, unknown>).id as string)
+    );
+
+    // Byg parent-child map
+    const map: Record<string, string[]> = {};
+    for (const entity of entities) {
+      const entityRecord = entity as unknown as Record<string, unknown>;
+      const children = (entityRecord[property] as string[]) || [];
+      map[entityRecord.id as string] = children;
+    }
+
+    return { parentChildMap: map, childType: childGrouping.type };
+  }
+}

packages/calendar/src/core/DateService.ts

@@ -0,0 +1,195 @@
+import dayjs from 'dayjs';
+import utc from 'dayjs/plugin/utc';
+import timezone from 'dayjs/plugin/timezone';
+import isoWeek from 'dayjs/plugin/isoWeek';
+import { ITimeFormatConfig } from './ITimeFormatConfig';
+
+// Enable dayjs plugins
+dayjs.extend(utc);
+dayjs.extend(timezone);
+dayjs.extend(isoWeek);
+
+export class DateService {
+  private timezone: string;
+  private baseDate: dayjs.Dayjs;
+
+  constructor(private config: ITimeFormatConfig, baseDate?: Date) {
+    this.timezone = config.timezone;
+    // Allow setting a fixed base date for demo/testing purposes
+    this.baseDate = baseDate ? dayjs(baseDate) : dayjs();
+  }
+
+  /**
+   * Set a fixed base date (useful for demos with static mock data)
+   */
+  setBaseDate(date: Date): void {
+    this.baseDate = dayjs(date);
+  }
+
+  /**
+   * Get the current base date (either fixed or today)
+   */
+  getBaseDate(): Date {
+    return this.baseDate.toDate();
+  }
+
+  parseISO(isoString: string): Date {
+    return dayjs(isoString).toDate();
+  }
+
+  getDayName(date: Date, format: 'short' | 'long' = 'short'): string {
+    return new Intl.DateTimeFormat(this.config.locale, { weekday: format }).format(date);
+  }
+
+  /**
+   * Get dates starting from a day offset
+   * @param dayOffset - Day offset from base date
+   * @param count - Number of consecutive days to return
+   * @returns Array of date strings in YYYY-MM-DD format
+   */
+  getDatesFromOffset(dayOffset: number, count: number): string[] {
+    const startDate = this.baseDate.add(dayOffset, 'day');
+    return Array.from({ length: count }, (_, i) =>
+      startDate.add(i, 'day').format('YYYY-MM-DD')
+    );
+  }
+
+  /**
+   * Get specific weekdays from the week containing the offset date
+   * @param dayOffset - Day offset from base date
+   * @param workDays - Array of ISO weekday numbers (1=Monday, 7=Sunday)
+   * @returns Array of date strings in YYYY-MM-DD format
+   */
+  getWorkDaysFromOffset(dayOffset: number, workDays: number[]): string[] {
+    // Get the date at offset, then find its week's Monday
+    const targetDate = this.baseDate.add(dayOffset, 'day');
+    const monday = targetDate.startOf('week').add(1, 'day');
+
+    return workDays.map(isoDay => {
+      // ISO: 1=Monday, 7=Sunday → days from Monday: 0-6
+      const daysFromMonday = isoDay === 7 ? 6 : isoDay - 1;
+      return monday.add(daysFromMonday, 'day').format('YYYY-MM-DD');
+    });
+  }
+
+  // Legacy methods for backwards compatibility
+  getWeekDates(weekOffset = 0, days = 7): string[] {
+    return this.getDatesFromOffset(weekOffset * 7, days);
+  }
+
+  getWorkWeekDates(weekOffset: number, workDays: number[]): string[] {
+    return this.getWorkDaysFromOffset(weekOffset * 7, workDays);
+  }
+
+  // ============================================
+  // FORMATTING
+  // ============================================
+
+  formatTime(date: Date, showSeconds = false): string {
+    const pattern = showSeconds ? 'HH:mm:ss' : 'HH:mm';
+    return dayjs(date).format(pattern);
+  }
+
+  formatTimeRange(start: Date, end: Date): string {
+    return `${this.formatTime(start)} - ${this.formatTime(end)}`;
+  }
+
+  formatDate(date: Date): string {
+    return dayjs(date).format('YYYY-MM-DD');
+  }
+
+  getDateKey(date: Date): string {
+    return this.formatDate(date);
+  }
+
+  // ============================================
+  // COLUMN KEY
+  // ============================================
+
+  /**
+   * Build a uniform columnKey from grouping segments
+   * Handles any combination of date, resource, team, etc.
+   *
+   * @example
+   * buildColumnKey({ date: '2025-12-09' }) → "2025-12-09"
+   * buildColumnKey({ date: '2025-12-09', resource: 'EMP001' }) → "2025-12-09:EMP001"
+   */
+  buildColumnKey(segments: Record<string, string>): string {
+    // Always put date first if present, then other segments alphabetically
+    const date = segments.date;
+    const others = Object.entries(segments)
+      .filter(([k]) => k !== 'date')
+      .sort(([a], [b]) => a.localeCompare(b))
+      .map(([, v]) => v);
+
+    return date ? [date, ...others].join(':') : others.join(':');
+  }
+
+  /**
+   * Parse a columnKey back into segments
+   * Assumes format: "date:resource:..." or just "date"
+   */
+  parseColumnKey(columnKey: string): { date: string; resource?: string } {
+    const parts = columnKey.split(':');
+    return {
+      date: parts[0],
+      resource: parts[1]
+    };
+  }
+
+  /**
+   * Extract dateKey from columnKey (first segment)
+   */
+  getDateFromColumnKey(columnKey: string): string {
+    return columnKey.split(':')[0];
+  }
+
+  // ============================================
+  // TIME CALCULATIONS
+  // ============================================
+
+  timeToMinutes(timeString: string): number {
+    const parts = timeString.split(':').map(Number);
+    const hours = parts[0] || 0;
+    const minutes = parts[1] || 0;
+    return hours * 60 + minutes;
+  }
+
+  minutesToTime(totalMinutes: number): string {
+    const hours = Math.floor(totalMinutes / 60);
+    const minutes = totalMinutes % 60;
+    return dayjs().hour(hours).minute(minutes).format('HH:mm');
+  }
+
+  getMinutesSinceMidnight(date: Date): number {
+    const d = dayjs(date);
+    return d.hour() * 60 + d.minute();
+  }
+
+  // ============================================
+  // UTC CONVERSIONS
+  // ============================================
+
+  toUTC(localDate: Date): string {
+    return dayjs.tz(localDate, this.timezone).utc().toISOString();
+  }
+
+  fromUTC(utcString: string): Date {
+    return dayjs.utc(utcString).tz(this.timezone).toDate();
+  }
+
+  // ============================================
+  // DATE CREATION
+  // ============================================
+
+  createDateAtTime(baseDate: Date | string, timeString: string): Date {
+    const totalMinutes = this.timeToMinutes(timeString);
+    const hours = Math.floor(totalMinutes / 60);
+    const minutes = totalMinutes % 60;
+    return dayjs(baseDate).startOf('day').hour(hours).minute(minutes).toDate();
+  }
+
+  getISOWeekDay(date: Date | string): number {
+    return dayjs(date).isoWeekday();  // 1=Monday, 7=Sunday
+  }
+}

packages/calendar/src/core/EntityResolver.ts

@@ -0,0 +1,48 @@
+import { IEntityResolver } from './IEntityResolver';
+
+/**
+ * EntityResolver - Resolves entities from pre-loaded cache
+ *
+ * Entities must be loaded before use (typically at render time).
+ * This allows synchronous lookups during filtering.
+ */
+export class EntityResolver implements IEntityResolver {
+  private cache: Map<string, Map<string, Record<string, unknown>>> = new Map();
+
+  /**
+   * Load entities into cache for a given type
+   * @param entityType - The entity type (e.g., 'resource')
+   * @param entities - Array of entities with 'id' property
+   */
+  load<T extends { id: string }>(entityType: string, entities: T[]): void {
+    const typeCache = new Map<string, Record<string, unknown>>();
+    for (const entity of entities) {
+      // Cast to Record for storage while preserving original data
+      typeCache.set(entity.id, entity as unknown as Record<string, unknown>);
+    }
+    this.cache.set(entityType, typeCache);
+  }
+
+  /**
+   * Resolve an entity by type and ID
+   */
+  resolve(entityType: string, id: string): Record<string, unknown> | undefined {
+    const typeCache = this.cache.get(entityType);
+    if (!typeCache) return undefined;
+    return typeCache.get(id);
+  }
+
+  /**
+   * Clear all cached entities
+   */
+  clear(): void {
+    this.cache.clear();
+  }
+
+  /**
+   * Clear cache for a specific entity type
+   */
+  clearType(entityType: string): void {
+    this.cache.delete(entityType);
+  }
+}

packages/calendar/src/core/EventBus.ts

@@ -0,0 +1,174 @@
+import { IEventLogEntry, IListenerEntry, IEventBus } from '../types/CalendarTypes';
+
+/**
+ * Central event dispatcher for calendar using DOM CustomEvents
+ * Provides logging and debugging capabilities
+ */
+export class EventBus implements IEventBus {
+  private eventLog: IEventLogEntry[] = [];
+  private debug: boolean = false;
+  private listeners: Set<IListenerEntry> = new Set();
+
+  // Log configuration for different categories
+  private logConfig: { [key: string]: boolean } = {
+    calendar: true,
+    grid: true,
+    event: true,
+    scroll: true,
+    navigation: true,
+    view: true,
+    default: true
+  };
+
+  /**
+   * Subscribe to an event via DOM addEventListener
+   */
+  on(eventType: string, handler: EventListener, options?: AddEventListenerOptions): () => void {
+    document.addEventListener(eventType, handler, options);
+
+    // Track for cleanup
+    this.listeners.add({ eventType, handler, options });
+
+    // Return unsubscribe function
+    return () => this.off(eventType, handler);
+  }
+
+  /**
+   * Subscribe to an event once
+   */
+  once(eventType: string, handler: EventListener): () => void {
+    return this.on(eventType, handler, { once: true });
+  }
+
+  /**
+   * Unsubscribe from an event
+   */
+  off(eventType: string, handler: EventListener): void {
+    document.removeEventListener(eventType, handler);
+
+    // Remove from tracking
+    for (const listener of this.listeners) {
+      if (listener.eventType === eventType && listener.handler === handler) {
+        this.listeners.delete(listener);
+        break;
+      }
+    }
+  }
+
+  /**
+   * Emit an event via DOM CustomEvent
+   */
+  emit(eventType: string, detail: unknown = {}): boolean {
+    // Validate eventType
+    if (!eventType) {
+      return false;
+    }
+
+    const event = new CustomEvent(eventType, {
+      detail: detail ?? {},
+      bubbles: true,
+      cancelable: true
+    });
+
+    // Log event with grouping
+    if (this.debug) {
+      this.logEventWithGrouping(eventType, detail);
+    }
+
+    this.eventLog.push({
+      type: eventType,
+      detail: detail ?? {},
+      timestamp: Date.now()
+    });
+
+    // Emit on document (only DOM events now)
+    return !document.dispatchEvent(event);
+  }
+
+  /**
+   * Log event with console grouping
+   */
+  private logEventWithGrouping(eventType: string, _detail: unknown): void {
+    // Extract category from event type (e.g., 'calendar:datechanged' → 'calendar')
+    const category = this.extractCategory(eventType);
+
+    // Only log if category is enabled
+    if (!this.logConfig[category]) {
+      return;
+    }
+
+    // Get category emoji and color (used for future console styling)
+    this.getCategoryStyle(category);
+  }
+
+  /**
+   * Extract category from event type
+   */
+  private extractCategory(eventType: string): string {
+    if (!eventType) {
+      return 'unknown';
+    }
+
+    if (eventType.includes(':')) {
+      return eventType.split(':')[0];
+    }
+
+    // Fallback: try to detect category from event name patterns
+    const lowerType = eventType.toLowerCase();
+    if (lowerType.includes('grid') || lowerType.includes('rendered')) return 'grid';
+    if (lowerType.includes('event') || lowerType.includes('sync')) return 'event';
+    if (lowerType.includes('scroll')) return 'scroll';
+    if (lowerType.includes('nav') || lowerType.includes('date')) return 'navigation';
+    if (lowerType.includes('view')) return 'view';
+
+    return 'default';
+  }
+
+  /**
+   * Get styling for different categories
+   */
+  private getCategoryStyle(category: string): { emoji: string; color: string } {
+    const styles: { [key: string]: { emoji: string; color: string } } = {
+      calendar: { emoji: '📅', color: '#2196F3' },
+      grid: { emoji: '📊', color: '#4CAF50' },
+      event: { emoji: '📌', color: '#FF9800' },
+      scroll: { emoji: '📜', color: '#9C27B0' },
+      navigation: { emoji: '🧭', color: '#F44336' },
+      view: { emoji: '👁', color: '#00BCD4' },
+      default: { emoji: '📢', color: '#607D8B' }
+    };
+
+    return styles[category] || styles.default;
+  }
+
+  /**
+   * Configure logging for specific categories
+   */
+  setLogConfig(config: { [key: string]: boolean }): void {
+    this.logConfig = { ...this.logConfig, ...config };
+  }
+
+  /**
+   * Get current log configuration
+   */
+  getLogConfig(): { [key: string]: boolean } {
+    return { ...this.logConfig };
+  }
+
+  /**
+   * Get event history
+   */
+  getEventLog(eventType?: string): IEventLogEntry[] {
+    if (eventType) {
+      return this.eventLog.filter(e => e.type === eventType);
+    }
+    return this.eventLog;
+  }
+
+  /**
+   * Enable/disable debug mode
+   */
+  setDebug(enabled: boolean): void {
+    this.debug = enabled;
+  }
+}

packages/calendar/src/core/FilterTemplate.ts

@@ -0,0 +1,149 @@
+import { ICalendarEvent } from '../types/CalendarTypes';
+import { DateService } from './DateService';
+import { IEntityResolver } from './IEntityResolver';
+
+/**
+ * Field definition for FilterTemplate
+ */
+interface IFilterField {
+  idProperty: string;
+  derivedFrom?: string;
+}
+
+/**
+ * Parsed dot-notation reference
+ */
+interface IDotNotation {
+  entityType: string;   // e.g., 'resource'
+  property: string;     // e.g., 'teamId'
+  foreignKey: string;   // e.g., 'resourceId'
+}
+
+/**
+ * FilterTemplate - Bygger nøgler til event-kolonne matching
+ *
+ * ViewConfig definerer hvilke felter (idProperties) der indgår i kolonnens nøgle.
+ * Samme template bruges til at bygge nøgle for både kolonne og event.
+ *
+ * Supports dot-notation for hierarchical relations:
+ * - 'resource.teamId' → looks up event.resourceId → resource entity → teamId
+ *
+ * Princip: Kolonnens nøgle-template bestemmer hvad der matches på.
+ *
+ * @see docs/filter-template.md
+ */
+export class FilterTemplate {
+  private fields: IFilterField[] = [];
+
+  constructor(
+    private dateService: DateService,
+    private entityResolver?: IEntityResolver
+  ) {}
+
+  /**
+   * Tilføj felt til template
+   * @param idProperty - Property-navn (bruges på både event og column.dataset)
+   * @param derivedFrom - Hvis feltet udledes fra anden property (f.eks. date fra start)
+   */
+  addField(idProperty: string, derivedFrom?: string): this {
+    this.fields.push({ idProperty, derivedFrom });
+    return this;
+  }
+
+  /**
+   * Parse dot-notation string into components
+   * @example 'resource.teamId' → { entityType: 'resource', property: 'teamId', foreignKey: 'resourceId' }
+   */
+  private parseDotNotation(idProperty: string): IDotNotation | null {
+    if (!idProperty.includes('.')) return null;
+    const [entityType, property] = idProperty.split('.');
+    return {
+      entityType,
+      property,
+      foreignKey: entityType + 'Id' // Convention: resource → resourceId
+    };
+  }
+
+  /**
+   * Get dataset key for column lookup
+   * For dot-notation 'resource.teamId', we look for 'teamId' in dataset
+   */
+  private getDatasetKey(idProperty: string): string {
+    const dotNotation = this.parseDotNotation(idProperty);
+    if (dotNotation) {
+      return dotNotation.property; // 'teamId'
+    }
+    return idProperty;
+  }
+
+  /**
+   * Byg nøgle fra kolonne
+   * Læser værdier fra column.dataset[idProperty]
+   * For dot-notation, uses the property part (resource.teamId → teamId)
+   */
+  buildKeyFromColumn(column: HTMLElement): string {
+    return this.fields
+      .map(f => {
+        const key = this.getDatasetKey(f.idProperty);
+        return column.dataset[key] || '';
+      })
+      .join(':');
+  }
+
+  /**
+   * Byg nøgle fra event
+   * Læser værdier fra event[idProperty] eller udleder fra derivedFrom
+   * For dot-notation, resolves via EntityResolver
+   */
+  buildKeyFromEvent(event: ICalendarEvent): string {
+    // eslint-disable-next-line @typescript-eslint/no-explicit-any
+    const eventRecord = event as any;
+    return this.fields
+      .map(f => {
+        // Check for dot-notation (e.g., 'resource.teamId')
+        const dotNotation = this.parseDotNotation(f.idProperty);
+        if (dotNotation) {
+          return this.resolveDotNotation(eventRecord, dotNotation);
+        }
+
+        if (f.derivedFrom) {
+          // Udled værdi (f.eks. date fra start)
+          const sourceValue = eventRecord[f.derivedFrom];
+          if (sourceValue instanceof Date) {
+            return this.dateService.getDateKey(sourceValue);
+          }
+          return String(sourceValue || '');
+        }
+        return String(eventRecord[f.idProperty] || '');
+      })
+      .join(':');
+  }
+
+  /**
+   * Resolve dot-notation reference via EntityResolver
+   */
+  private resolveDotNotation(eventRecord: Record<string, unknown>, dotNotation: IDotNotation): string {
+    if (!this.entityResolver) {
+      console.warn(`FilterTemplate: EntityResolver required for dot-notation '${dotNotation.entityType}.${dotNotation.property}'`);
+      return '';
+    }
+
+    // Get foreign key value from event (e.g., resourceId)
+    const foreignId = eventRecord[dotNotation.foreignKey];
+    if (!foreignId) return '';
+
+    // Resolve entity
+    const entity = this.entityResolver.resolve(dotNotation.entityType, String(foreignId));
+    if (!entity) return '';
+
+    // Return property value from entity
+    return String(entity[dotNotation.property] || '');
+  }
+
+  /**
+   * Match event mod kolonne
+   */
+  matches(event: ICalendarEvent, column: HTMLElement): boolean {
+    return this.buildKeyFromEvent(event) === this.buildKeyFromColumn(column);
+  }
+}

packages/calendar/src/core/HeaderDrawerManager.ts

@@ -0,0 +1,70 @@
+export class HeaderDrawerManager {
+  private drawer!: HTMLElement;
+  private expanded = false;
+  private currentRows = 0;
+  private readonly rowHeight = 25;
+  private readonly duration = 200;
+
+  init(container: HTMLElement): void {
+    this.drawer = container.querySelector('swp-header-drawer')!;
+
+    if (!this.drawer) console.error('HeaderDrawerManager: swp-header-drawer not found');
+  }
+
+  toggle(): void {
+    this.expanded ? this.collapse() : this.expand();
+  }
+
+  /**
+   * Expand drawer to single row (legacy support)
+   */
+  expand(): void {
+    this.expandToRows(1);
+  }
+
+  /**
+   * Expand drawer to fit specified number of rows
+   */
+  expandToRows(rowCount: number): void {
+    const targetHeight = rowCount * this.rowHeight;
+    const currentHeight = this.expanded ? this.currentRows * this.rowHeight : 0;
+
+    // Skip if already at target
+    if (this.expanded && this.currentRows === rowCount) return;
+
+    this.currentRows = rowCount;
+    this.expanded = true;
+    this.animate(currentHeight, targetHeight);
+  }
+
+  collapse(): void {
+    if (!this.expanded) return;
+    const currentHeight = this.currentRows * this.rowHeight;
+    this.expanded = false;
+    this.currentRows = 0;
+    this.animate(currentHeight, 0);
+  }
+
+  private animate(from: number, to: number): void {
+    const keyframes = [
+      { height: `${from}px` },
+      { height: `${to}px` }
+    ];
+    const options: KeyframeAnimationOptions = {
+      duration: this.duration,
+      easing: 'ease',
+      fill: 'forwards'
+    };
+
+    // Kun animér drawer - ScrollManager synkroniserer header-spacer via ResizeObserver
+    this.drawer.animate(keyframes, options);
+  }
+
+  isExpanded(): boolean {
+    return this.expanded;
+  }
+
+  getRowCount(): number {
+    return this.currentRows;
+  }
+}

packages/calendar/src/core/IEntityResolver.ts

@@ -0,0 +1,15 @@
+/**
+ * IEntityResolver - Resolves entities by type and ID
+ *
+ * Used by FilterTemplate to resolve dot-notation references like 'resource.teamId'
+ * where the value needs to be looked up from a related entity.
+ */
+export interface IEntityResolver {
+  /**
+   * Resolve an entity by type and ID
+   * @param entityType - The entity type (e.g., 'resource', 'booking', 'customer')
+   * @param id - The entity ID
+   * @returns The entity record or undefined if not found
+   */
+  resolve(entityType: string, id: string): Record<string, unknown> | undefined;
+}

packages/calendar/src/core/IGridConfig.ts

@@ -0,0 +1,7 @@
+export interface IGridConfig {
+  hourHeight: number;      // pixels per hour
+  dayStartHour: number;    // e.g. 6
+  dayEndHour: number;      // e.g. 18
+  snapInterval: number;    // minutes, e.g. 15
+  gridStartThresholdMinutes?: number;  // threshold for GRID grouping (default 10)
+}

packages/calendar/src/core/IGroupingRenderer.ts

@@ -0,0 +1,15 @@
+import { GroupingConfig } from './ViewConfig';
+
+export interface IRenderContext {
+  headerContainer: HTMLElement;
+  columnContainer: HTMLElement;
+  filter: Record<string, string[]>;  // { team: ['alpha'], resource: ['alice', 'bob'], date: [...] }
+  groupings?: GroupingConfig[];      // Full grouping configs (for hideHeader etc.)
+  parentChildMap?: Record<string, string[]>;  // { team1: ['EMP001', 'EMP002'], team2: ['EMP003', 'EMP004'] }
+  childType?: string;  // The type of the child grouping (e.g., 'resource' when team has belongsTo)
+}
+
+export interface IRenderer {
+  readonly type: string;
+  render(context: IRenderContext): void | Promise<void>;
+}

packages/calendar/src/core/IGroupingStore.ts

@@ -0,0 +1,4 @@
+export interface IGroupingStore<T = unknown> {
+  readonly type: string;
+  getByIds(ids: string[]): T[];
+}

packages/calendar/src/core/ITimeFormatConfig.ts

@@ -1,10 +1,7 @@
-/**
- * Time format configuration settings
- */
-export interface ITimeFormatConfig {
-  timezone: string;
-  use24HourFormat: boolean;
-  locale: string;
-  dateFormat: 'locale' | 'technical';
-  showSeconds: boolean;
-}
+export interface ITimeFormatConfig {
+  timezone: string;
+  use24HourFormat: boolean;
+  locale: string;
+  dateFormat: 'locale' | 'technical';
+  showSeconds: boolean;
+}

packages/calendar/src/core/NavigationAnimator.ts

@@ -0,0 +1,64 @@
+export class NavigationAnimator {
+  constructor(
+    private headerTrack: HTMLElement,
+    private contentTrack: HTMLElement,
+    private headerDrawer: HTMLElement | null
+  ) {}
+
+  async slide(direction: 'left' | 'right', renderFn: () => Promise<void>): Promise<void> {
+    const out = direction === 'left' ? '-100%' : '100%';
+    const into = direction === 'left' ? '100%' : '-100%';
+
+    await this.animateOut(out);
+    await renderFn();
+    await this.animateIn(into);
+  }
+
+  private async animateOut(translate: string): Promise<void> {
+    const animations = [
+      this.headerTrack.animate(
+        [{ transform: 'translateX(0)' }, { transform: `translateX(${translate})` }],
+        { duration: 200, easing: 'ease-in' }
+      ).finished,
+      this.contentTrack.animate(
+        [{ transform: 'translateX(0)' }, { transform: `translateX(${translate})` }],
+        { duration: 200, easing: 'ease-in' }
+      ).finished
+    ];
+
+    if (this.headerDrawer) {
+      animations.push(
+        this.headerDrawer.animate(
+          [{ transform: 'translateX(0)' }, { transform: `translateX(${translate})` }],
+          { duration: 200, easing: 'ease-in' }
+        ).finished
+      );
+    }
+
+    await Promise.all(animations);
+  }
+
+  private async animateIn(translate: string): Promise<void> {
+    const animations = [
+      this.headerTrack.animate(
+        [{ transform: `translateX(${translate})` }, { transform: 'translateX(0)' }],
+        { duration: 200, easing: 'ease-out' }
+      ).finished,
+      this.contentTrack.animate(
+        [{ transform: `translateX(${translate})` }, { transform: 'translateX(0)' }],
+        { duration: 200, easing: 'ease-out' }
+      ).finished
+    ];
+
+    if (this.headerDrawer) {
+      animations.push(
+        this.headerDrawer.animate(
+          [{ transform: `translateX(${translate})` }, { transform: 'translateX(0)' }],
+          { duration: 200, easing: 'ease-out' }
+        ).finished
+      );
+    }
+
+    await Promise.all(animations);
+  }
+}

packages/calendar/src/core/RenderBuilder.ts

@@ -0,0 +1,15 @@
+import { IRenderer, IRenderContext } from './IGroupingRenderer';
+
+export interface Pipeline {
+  run(context: IRenderContext): Promise<void>;
+}
+
+export function buildPipeline(renderers: IRenderer[]): Pipeline {
+  return {
+    async run(context: IRenderContext) {
+      for (const renderer of renderers) {
+        await renderer.render(context);
+      }
+    }
+  };
+}

packages/calendar/src/core/ScrollManager.ts

@@ -0,0 +1,42 @@
+export class ScrollManager {
+  private scrollableContent!: HTMLElement;
+  private timeAxisContent!: HTMLElement;
+  private calendarHeader!: HTMLElement;
+  private headerDrawer!: HTMLElement;
+  private headerViewport!: HTMLElement;
+  private headerSpacer!: HTMLElement;
+  private resizeObserver!: ResizeObserver;
+
+  init(container: HTMLElement): void {
+    this.scrollableContent = container.querySelector('swp-scrollable-content')!;
+    this.timeAxisContent = container.querySelector('swp-time-axis-content')!;
+    this.calendarHeader = container.querySelector('swp-calendar-header')!;
+    this.headerDrawer = container.querySelector('swp-header-drawer')!;
+    this.headerViewport = container.querySelector('swp-header-viewport')!;
+    this.headerSpacer = container.querySelector('swp-header-spacer')!;
+
+    this.scrollableContent.addEventListener('scroll', () => this.onScroll());
+
+    // Synkroniser header-spacer højde med header-viewport
+    this.resizeObserver = new ResizeObserver(() => this.syncHeaderSpacerHeight());
+    this.resizeObserver.observe(this.headerViewport);
+    this.syncHeaderSpacerHeight();
+  }
+
+  private syncHeaderSpacerHeight(): void {
+    // Kopier den faktiske computed height direkte fra header-viewport
+    const computedHeight = getComputedStyle(this.headerViewport).height;
+    this.headerSpacer.style.height = computedHeight;
+  }
+
+  private onScroll(): void {
+    const { scrollTop, scrollLeft } = this.scrollableContent;
+
+    // Synkroniser time-axis vertikalt
+    this.timeAxisContent.style.transform = `translateY(-${scrollTop}px)`;
+
+    // Synkroniser header og drawer horisontalt
+    this.calendarHeader.style.transform = `translateX(-${scrollLeft}px)`;
+    this.headerDrawer.style.transform = `translateX(-${scrollLeft}px)`;
+  }
+}

packages/calendar/src/core/ViewConfig.ts

@@ -0,0 +1,21 @@
+import { ISync } from '../types/CalendarTypes';
+
+export interface ViewTemplate {
+  id: string;
+  name: string;
+  groupingTypes: string[];
+}
+
+export interface ViewConfig extends ISync {
+  id: string;  // templateId (e.g. 'day', 'simple', 'resource')
+  groupings: GroupingConfig[];
+}
+
+export interface GroupingConfig {
+  type: string;
+  values: string[];
+  idProperty?: string;      // Property-navn på event (f.eks. 'resourceId') - kun for event matching
+  derivedFrom?: string;     // Hvis feltet udledes fra anden property (f.eks. 'date' fra 'start')
+  belongsTo?: string;       // Parent-child relation (f.eks. 'team.resourceIds')
+  hideHeader?: boolean;     // Skjul header-rækken for denne grouping (f.eks. dato i day-view)
+}

packages/calendar/src/extensions/audit/AuditService.ts

@@ -0,0 +1,167 @@
+import { BaseEntityService } from '../../storage/BaseEntityService';
+import { IndexedDBContext } from '../../storage/IndexedDBContext';
+import { IAuditEntry, IAuditLoggedPayload } from '../../types/AuditTypes';
+import { EntityType, IEventBus, IEntitySavedPayload, IEntityDeletedPayload } from '../../types/CalendarTypes';
+import { CoreEvents } from '../../constants/CoreEvents';
+
+/**
+ * AuditService - Entity service for audit entries
+ *
+ * RESPONSIBILITIES:
+ * - Store audit entries in IndexedDB
+ * - Listen for ENTITY_SAVED/ENTITY_DELETED events
+ * - Create audit entries for all entity changes
+ * - Emit AUDIT_LOGGED after saving (for SyncManager to listen)
+ *
+ * OVERRIDE PATTERN:
+ * - Overrides save() to NOT emit events (prevents infinite loops)
+ * - AuditService saves audit entries without triggering more audits
+ *
+ * EVENT CHAIN:
+ * Entity change → ENTITY_SAVED/DELETED → AuditService → AUDIT_LOGGED → SyncManager
+ */
+export class AuditService extends BaseEntityService<IAuditEntry> {
+  readonly storeName = 'audit';
+  readonly entityType: EntityType = 'Audit';
+
+  // Hardcoded userId for now - will come from session later
+  private static readonly DEFAULT_USER_ID = '00000000-0000-0000-0000-000000000001';
+
+  constructor(context: IndexedDBContext, eventBus: IEventBus) {
+    super(context, eventBus);
+    this.setupEventListeners();
+  }
+
+  /**
+   * Setup listeners for ENTITY_SAVED and ENTITY_DELETED events
+   */
+  private setupEventListeners(): void {
+    // Listen for entity saves (create/update)
+    this.eventBus.on(CoreEvents.ENTITY_SAVED, (event: Event) => {
+      const detail = (event as CustomEvent).detail;
+      this.handleEntitySaved(detail);
+    });
+
+    // Listen for entity deletes
+    this.eventBus.on(CoreEvents.ENTITY_DELETED, (event: Event) => {
+      const detail = (event as CustomEvent).detail;
+      this.handleEntityDeleted(detail);
+    });
+  }
+
+  /**
+   * Handle ENTITY_SAVED event - create audit entry
+   */
+  private async handleEntitySaved(payload: IEntitySavedPayload): Promise<void> {
+    // Don't audit audit entries (prevent infinite loops)
+    if (payload.entityType === 'Audit') return;
+
+    const auditEntry: IAuditEntry = {
+      id: crypto.randomUUID(),
+      entityType: payload.entityType,
+      entityId: payload.entityId,
+      operation: payload.operation,
+      userId: AuditService.DEFAULT_USER_ID,
+      timestamp: payload.timestamp,
+      changes: payload.changes,
+      synced: false,
+      syncStatus: 'pending'
+    };
+
+    await this.save(auditEntry);
+  }
+
+  /**
+   * Handle ENTITY_DELETED event - create audit entry
+   */
+  private async handleEntityDeleted(payload: IEntityDeletedPayload): Promise<void> {
+    // Don't audit audit entries (prevent infinite loops)
+    if (payload.entityType === 'Audit') return;
+
+    const auditEntry: IAuditEntry = {
+      id: crypto.randomUUID(),
+      entityType: payload.entityType,
+      entityId: payload.entityId,
+      operation: 'delete',
+      userId: AuditService.DEFAULT_USER_ID,
+      timestamp: payload.timestamp,
+      changes: { id: payload.entityId }, // For delete, just store the ID
+      synced: false,
+      syncStatus: 'pending'
+    };
+
+    await this.save(auditEntry);
+  }
+
+  /**
+   * Override save to NOT trigger ENTITY_SAVED event
+   * Instead, emits AUDIT_LOGGED for SyncManager to listen
+   *
+   * This prevents infinite loops:
+   * - BaseEntityService.save() emits ENTITY_SAVED
+   * - AuditService listens to ENTITY_SAVED and creates audit
+   * - If AuditService.save() also emitted ENTITY_SAVED, it would loop
+   */
+  async save(entity: IAuditEntry): Promise<void> {
+    const serialized = this.serialize(entity);
+
+    return new Promise((resolve, reject) => {
+      const transaction = this.db.transaction([this.storeName], 'readwrite');
+      const store = transaction.objectStore(this.storeName);
+      const request = store.put(serialized);
+
+      request.onsuccess = () => {
+        // Emit AUDIT_LOGGED instead of ENTITY_SAVED
+        const payload: IAuditLoggedPayload = {
+          auditId: entity.id,
+          entityType: entity.entityType,
+          entityId: entity.entityId,
+          operation: entity.operation,
+          timestamp: entity.timestamp
+        };
+        this.eventBus.emit(CoreEvents.AUDIT_LOGGED, payload);
+        resolve();
+      };
+
+      request.onerror = () => {
+        reject(new Error(`Failed to save audit entry ${entity.id}: ${request.error}`));
+      };
+    });
+  }
+
+  /**
+   * Override delete to NOT trigger ENTITY_DELETED event
+   * Audit entries should never be deleted (compliance requirement)
+   */
+  async delete(_id: string): Promise<void> {
+    throw new Error('Audit entries cannot be deleted (compliance requirement)');
+  }
+
+  /**
+   * Get pending audit entries (for sync)
+   */
+  async getPendingAudits(): Promise<IAuditEntry[]> {
+    return this.getBySyncStatus('pending');
+  }
+
+  /**
+   * Get audit entries for a specific entity
+   */
+  async getByEntityId(entityId: string): Promise<IAuditEntry[]> {
+    return new Promise((resolve, reject) => {
+      const transaction = this.db.transaction([this.storeName], 'readonly');
+      const store = transaction.objectStore(this.storeName);
+      const index = store.index('entityId');
+      const request = index.getAll(entityId);
+
+      request.onsuccess = () => {
+        const entries = request.result as IAuditEntry[];
+        resolve(entries);
+      };
+
+      request.onerror = () => {
+        reject(new Error(`Failed to get audit entries for entity ${entityId}: ${request.error}`));
+      };
+    });
+  }
+}

packages/calendar/src/extensions/audit/AuditStore.ts

@@ -0,0 +1,27 @@
+import { IStore } from '../../storage/IStore';
+
+/**
+ * AuditStore - IndexedDB store configuration for audit entries
+ *
+ * Stores all entity changes for:
+ * - Compliance and audit trail
+ * - Sync tracking with backend
+ * - Change history
+ *
+ * Indexes:
+ * - syncStatus: For finding pending entries to sync
+ * - synced: Boolean flag for quick sync queries
+ * - entityId: For getting all audits for a specific entity
+ * - timestamp: For chronological queries
+ */
+export class AuditStore implements IStore {
+  readonly storeName = 'audit';
+
+  create(db: IDBDatabase): void {
+    const store = db.createObjectStore(this.storeName, { keyPath: 'id' });
+    store.createIndex('syncStatus', 'syncStatus', { unique: false });
+    store.createIndex('synced', 'synced', { unique: false });
+    store.createIndex('entityId', 'entityId', { unique: false });
+    store.createIndex('timestamp', 'timestamp', { unique: false });
+  }
+}

packages/calendar/src/extensions/audit/index.ts

@@ -0,0 +1,14 @@
+export { AuditService } from './AuditService';
+export { AuditStore } from './AuditStore';
+export type { IAuditEntry, IAuditLoggedPayload } from '../../types/AuditTypes';
+
+// DI registration helper
+import type { Builder } from '@novadi/core';
+import { IStore } from '../../storage/IStore';
+import { AuditStore } from './AuditStore';
+import { AuditService } from './AuditService';
+
+export function registerAudit(builder: Builder): void {
+  builder.registerType(AuditStore).as<IStore>();
+  builder.registerType(AuditService).as<AuditService>();
+}

packages/calendar/src/extensions/bookings/BookingService.ts

@@ -0,0 +1,75 @@
+import { IBooking, EntityType, IEventBus, BookingStatus } from '../../types/CalendarTypes';
+import { BookingStore } from './BookingStore';
+import { BaseEntityService } from '../../storage/BaseEntityService';
+import { IndexedDBContext } from '../../storage/IndexedDBContext';
+
+/**
+ * BookingService - CRUD operations for bookings in IndexedDB
+ */
+export class BookingService extends BaseEntityService<IBooking> {
+  readonly storeName = BookingStore.STORE_NAME;
+  readonly entityType: EntityType = 'Booking';
+
+  constructor(context: IndexedDBContext, eventBus: IEventBus) {
+    super(context, eventBus);
+  }
+
+  protected serialize(booking: IBooking): unknown {
+    return {
+      ...booking,
+      createdAt: booking.createdAt.toISOString()
+    };
+  }
+
+  protected deserialize(data: unknown): IBooking {
+    const raw = data as Record<string, unknown>;
+    return {
+      ...raw,
+      createdAt: new Date(raw.createdAt as string)
+    } as IBooking;
+  }
+
+  /**
+   * Get bookings for a customer
+   */
+  async getByCustomer(customerId: string): Promise<IBooking[]> {
+    return new Promise((resolve, reject) => {
+      const transaction = this.db.transaction([this.storeName], 'readonly');
+      const store = transaction.objectStore(this.storeName);
+      const index = store.index('customerId');
+      const request = index.getAll(customerId);
+
+      request.onsuccess = () => {
+        const data = request.result as unknown[];
+        const bookings = data.map(item => this.deserialize(item));
+        resolve(bookings);
+      };
+
+      request.onerror = () => {
+        reject(new Error(`Failed to get bookings for customer ${customerId}: ${request.error}`));
+      };
+    });
+  }
+
+  /**
+   * Get bookings by status
+   */
+  async getByStatus(status: BookingStatus): Promise<IBooking[]> {
+    return new Promise((resolve, reject) => {
+      const transaction = this.db.transaction([this.storeName], 'readonly');
+      const store = transaction.objectStore(this.storeName);
+      const index = store.index('status');
+      const request = index.getAll(status);
+
+      request.onsuccess = () => {
+        const data = request.result as unknown[];
+        const bookings = data.map(item => this.deserialize(item));
+        resolve(bookings);
+      };
+
+      request.onerror = () => {
+        reject(new Error(`Failed to get bookings with status ${status}: ${request.error}`));
+      };
+    });
+  }
+}

packages/calendar/src/extensions/bookings/BookingStore.ts

@@ -0,0 +1,18 @@
+import { IStore } from '../../storage/IStore';
+
+/**
+ * BookingStore - IndexedDB ObjectStore definition for bookings
+ */
+export class BookingStore implements IStore {
+  static readonly STORE_NAME = 'bookings';
+  readonly storeName = BookingStore.STORE_NAME;
+
+  create(db: IDBDatabase): void {
+    const store = db.createObjectStore(BookingStore.STORE_NAME, { keyPath: 'id' });
+
+    store.createIndex('customerId', 'customerId', { unique: false });
+    store.createIndex('status', 'status', { unique: false });
+    store.createIndex('syncStatus', 'syncStatus', { unique: false });
+    store.createIndex('createdAt', 'createdAt', { unique: false });
+  }
+}

packages/calendar/src/extensions/bookings/index.ts

@@ -0,0 +1,18 @@
+export { BookingService } from './BookingService';
+export { BookingStore } from './BookingStore';
+export type { IBooking, BookingStatus, IBookingService } from '../../types/CalendarTypes';
+
+// DI registration helper
+import type { Builder } from '@novadi/core';
+import { IStore } from '../../storage/IStore';
+import { IEntityService } from '../../storage/IEntityService';
+import type { IBooking, ISync } from '../../types/CalendarTypes';
+import { BookingStore } from './BookingStore';
+import { BookingService } from './BookingService';
+
+export function registerBookings(builder: Builder): void {
+  builder.registerType(BookingStore).as<IStore>();
+  builder.registerType(BookingService).as<IEntityService<IBooking>>();
+  builder.registerType(BookingService).as<IEntityService<ISync>>();
+  builder.registerType(BookingService).as<BookingService>();
+}

packages/calendar/src/extensions/customers/CustomerService.ts

@@ -0,0 +1,46 @@
+import { ICustomer, EntityType, IEventBus } from '../../types/CalendarTypes';
+import { CustomerStore } from './CustomerStore';
+import { BaseEntityService } from '../../storage/BaseEntityService';
+import { IndexedDBContext } from '../../storage/IndexedDBContext';
+
+/**
+ * CustomerService - CRUD operations for customers in IndexedDB
+ */
+export class CustomerService extends BaseEntityService<ICustomer> {
+  readonly storeName = CustomerStore.STORE_NAME;
+  readonly entityType: EntityType = 'Customer';
+
+  constructor(context: IndexedDBContext, eventBus: IEventBus) {
+    super(context, eventBus);
+  }
+
+  /**
+   * Search customers by name (case-insensitive contains)
+   */
+  async searchByName(query: string): Promise<ICustomer[]> {
+    const all = await this.getAll();
+    const lowerQuery = query.toLowerCase();
+    return all.filter(c => c.name.toLowerCase().includes(lowerQuery));
+  }
+
+  /**
+   * Find customer by phone
+   */
+  async getByPhone(phone: string): Promise<ICustomer | null> {
+    return new Promise((resolve, reject) => {
+      const transaction = this.db.transaction([this.storeName], 'readonly');
+      const store = transaction.objectStore(this.storeName);
+      const index = store.index('phone');
+      const request = index.get(phone);
+
+      request.onsuccess = () => {
+        const data = request.result;
+        resolve(data ? (data as ICustomer) : null);
+      };
+
+      request.onerror = () => {
+        reject(new Error(`Failed to find customer by phone ${phone}: ${request.error}`));
+      };
+    });
+  }
+}

packages/calendar/src/extensions/customers/CustomerStore.ts

@@ -0,0 +1,17 @@
+import { IStore } from '../../storage/IStore';
+
+/**
+ * CustomerStore - IndexedDB ObjectStore definition for customers
+ */
+export class CustomerStore implements IStore {
+  static readonly STORE_NAME = 'customers';
+  readonly storeName = CustomerStore.STORE_NAME;
+
+  create(db: IDBDatabase): void {
+    const store = db.createObjectStore(CustomerStore.STORE_NAME, { keyPath: 'id' });
+
+    store.createIndex('name', 'name', { unique: false });
+    store.createIndex('phone', 'phone', { unique: false });
+    store.createIndex('syncStatus', 'syncStatus', { unique: false });
+  }
+}

packages/calendar/src/extensions/customers/index.ts

@@ -0,0 +1,18 @@
+export { CustomerService } from './CustomerService';
+export { CustomerStore } from './CustomerStore';
+export type { ICustomer } from '../../types/CalendarTypes';
+
+// DI registration helper
+import type { Builder } from '@novadi/core';
+import { IStore } from '../../storage/IStore';
+import { IEntityService } from '../../storage/IEntityService';
+import type { ICustomer, ISync } from '../../types/CalendarTypes';
+import { CustomerStore } from './CustomerStore';
+import { CustomerService } from './CustomerService';
+
+export function registerCustomers(builder: Builder): void {
+  builder.registerType(CustomerStore).as<IStore>();
+  builder.registerType(CustomerService).as<IEntityService<ICustomer>>();
+  builder.registerType(CustomerService).as<IEntityService<ISync>>();
+  builder.registerType(CustomerService).as<CustomerService>();
+}

packages/calendar/src/extensions/departments/DepartmentRenderer.ts

@@ -0,0 +1,25 @@
+import { BaseGroupingRenderer, IGroupingRendererConfig } from '../../core/BaseGroupingRenderer';
+import { DepartmentService } from './DepartmentService';
+import { IDepartment } from '../../types/CalendarTypes';
+
+export class DepartmentRenderer extends BaseGroupingRenderer<IDepartment> {
+  readonly type = 'department';
+
+  protected readonly config: IGroupingRendererConfig = {
+    elementTag: 'swp-department-header',
+    idAttribute: 'departmentId',
+    colspanVar: '--department-cols'
+  };
+
+  constructor(private departmentService: DepartmentService) {
+    super();
+  }
+
+  protected getEntities(ids: string[]): Promise<IDepartment[]> {
+    return this.departmentService.getByIds(ids);
+  }
+
+  protected getDisplayName(entity: IDepartment): string {
+    return entity.name;
+  }
+}

packages/calendar/src/extensions/departments/DepartmentService.ts

@@ -0,0 +1,25 @@
+import { IDepartment, EntityType, IEventBus } from '../../types/CalendarTypes';
+import { DepartmentStore } from './DepartmentStore';
+import { BaseEntityService } from '../../storage/BaseEntityService';
+import { IndexedDBContext } from '../../storage/IndexedDBContext';
+
+/**
+ * DepartmentService - CRUD operations for departments in IndexedDB
+ */
+export class DepartmentService extends BaseEntityService<IDepartment> {
+  readonly storeName = DepartmentStore.STORE_NAME;
+  readonly entityType: EntityType = 'Department';
+
+  constructor(context: IndexedDBContext, eventBus: IEventBus) {
+    super(context, eventBus);
+  }
+
+  /**
+   * Get departments by IDs
+   */
+  async getByIds(ids: string[]): Promise<IDepartment[]> {
+    if (ids.length === 0) return [];
+    const results = await Promise.all(ids.map(id => this.get(id)));
+    return results.filter((d): d is IDepartment => d !== null);
+  }
+}

packages/calendar/src/extensions/departments/DepartmentStore.ts

@@ -0,0 +1,13 @@
+import { IStore } from '../../storage/IStore';
+
+/**
+ * DepartmentStore - IndexedDB ObjectStore definition for departments
+ */
+export class DepartmentStore implements IStore {
+  static readonly STORE_NAME = 'departments';
+  readonly storeName = DepartmentStore.STORE_NAME;
+
+  create(db: IDBDatabase): void {
+    db.createObjectStore(DepartmentStore.STORE_NAME, { keyPath: 'id' });
+  }
+}

packages/calendar/src/extensions/departments/index.ts

@@ -0,0 +1,22 @@
+export { DepartmentRenderer } from './DepartmentRenderer';
+export { DepartmentService } from './DepartmentService';
+export { DepartmentStore } from './DepartmentStore';
+export type { IDepartment } from '../../types/CalendarTypes';
+
+// DI registration helper
+import type { Builder } from '@novadi/core';
+import { IRenderer } from '../../core/IGroupingRenderer';
+import { IStore } from '../../storage/IStore';
+import { IEntityService } from '../../storage/IEntityService';
+import type { IDepartment, ISync } from '../../types/CalendarTypes';
+import { DepartmentStore } from './DepartmentStore';
+import { DepartmentService } from './DepartmentService';
+import { DepartmentRenderer } from './DepartmentRenderer';
+
+export function registerDepartments(builder: Builder): void {
+  builder.registerType(DepartmentStore).as<IStore>();
+  builder.registerType(DepartmentService).as<IEntityService<IDepartment>>();
+  builder.registerType(DepartmentService).as<IEntityService<ISync>>();
+  builder.registerType(DepartmentService).as<DepartmentService>();
+  builder.registerType(DepartmentRenderer).as<IRenderer>();
+}

packages/calendar/src/extensions/schedules/ResourceScheduleService.ts

@@ -0,0 +1,84 @@
+import { ITimeSlot } from '../../types/ScheduleTypes';
+import { ResourceService } from '../../storage/resources/ResourceService';
+import { ScheduleOverrideService } from './ScheduleOverrideService';
+import { DateService } from '../../core/DateService';
+
+/**
+ * ResourceScheduleService - Get effective schedule for a resource on a date
+ *
+ * Logic:
+ * 1. Check for override on this date
+ * 2. Fall back to default schedule for the weekday
+ */
+export class ResourceScheduleService {
+  constructor(
+    private resourceService: ResourceService,
+    private overrideService: ScheduleOverrideService,
+    private dateService: DateService
+  ) {}
+
+  /**
+   * Get effective schedule for a resource on a specific date
+   *
+   * @param resourceId - Resource ID
+   * @param date - Date string "YYYY-MM-DD"
+   * @returns ITimeSlot or null (fri/closed)
+   */
+  async getScheduleForDate(resourceId: string, date: string): Promise<ITimeSlot | null> {
+    // 1. Check for override
+    const override = await this.overrideService.getOverride(resourceId, date);
+    if (override) {
+      return override.schedule;
+    }
+
+    // 2. Use default schedule for weekday
+    const resource = await this.resourceService.get(resourceId);
+    if (!resource || !resource.defaultSchedule) {
+      return null;
+    }
+
+    const weekDay = this.dateService.getISOWeekDay(date);
+    return resource.defaultSchedule[weekDay] || null;
+  }
+
+  /**
+   * Get schedules for multiple dates
+   *
+   * @param resourceId - Resource ID
+   * @param dates - Array of date strings "YYYY-MM-DD"
+   * @returns Map of date -> ITimeSlot | null
+   */
+  async getSchedulesForDates(resourceId: string, dates: string[]): Promise<Map<string, ITimeSlot | null>> {
+    const result = new Map<string, ITimeSlot | null>();
+
+    // Get resource once
+    const resource = await this.resourceService.get(resourceId);
+
+    // Get all overrides in date range
+    const overrides = dates.length > 0
+      ? await this.overrideService.getByDateRange(resourceId, dates[0], dates[dates.length - 1])
+      : [];
+
+    // Build override map
+    const overrideMap = new Map(overrides.map(o => [o.date, o.schedule]));
+
+    // Resolve each date
+    for (const date of dates) {
+      // Check override first
+      if (overrideMap.has(date)) {
+        result.set(date, overrideMap.get(date)!);
+        continue;
+      }
+
+      // Fall back to default
+      if (resource?.defaultSchedule) {
+        const weekDay = this.dateService.getISOWeekDay(date);
+        result.set(date, resource.defaultSchedule[weekDay] || null);
+      } else {
+        result.set(date, null);
+      }
+    }
+
+    return result;
+  }
+}

packages/calendar/src/extensions/schedules/ScheduleOverrideService.ts

@@ -0,0 +1,100 @@
+import { IScheduleOverride } from '../../types/ScheduleTypes';
+import { IndexedDBContext } from '../../storage/IndexedDBContext';
+import { ScheduleOverrideStore } from './ScheduleOverrideStore';
+
+/**
+ * ScheduleOverrideService - CRUD for schedule overrides
+ *
+ * Provides access to date-specific schedule overrides for resources.
+ */
+export class ScheduleOverrideService {
+  private context: IndexedDBContext;
+
+  constructor(context: IndexedDBContext) {
+    this.context = context;
+  }
+
+  private get db(): IDBDatabase {
+    return this.context.getDatabase();
+  }
+
+  /**
+   * Get override for a specific resource and date
+   */
+  async getOverride(resourceId: string, date: string): Promise<IScheduleOverride | null> {
+    return new Promise((resolve, reject) => {
+      const transaction = this.db.transaction([ScheduleOverrideStore.STORE_NAME], 'readonly');
+      const store = transaction.objectStore(ScheduleOverrideStore.STORE_NAME);
+      const index = store.index('resourceId_date');
+      const request = index.get([resourceId, date]);
+
+      request.onsuccess = () => {
+        resolve(request.result || null);
+      };
+
+      request.onerror = () => {
+        reject(new Error(`Failed to get override for ${resourceId} on ${date}: ${request.error}`));
+      };
+    });
+  }
+
+  /**
+   * Get all overrides for a resource
+   */
+  async getByResource(resourceId: string): Promise<IScheduleOverride[]> {
+    return new Promise((resolve, reject) => {
+      const transaction = this.db.transaction([ScheduleOverrideStore.STORE_NAME], 'readonly');
+      const store = transaction.objectStore(ScheduleOverrideStore.STORE_NAME);
+      const index = store.index('resourceId');
+      const request = index.getAll(resourceId);
+
+      request.onsuccess = () => {
+        resolve(request.result || []);
+      };
+
+      request.onerror = () => {
+        reject(new Error(`Failed to get overrides for ${resourceId}: ${request.error}`));
+      };
+    });
+  }
+
+  /**
+   * Get overrides for a date range
+   */
+  async getByDateRange(resourceId: string, startDate: string, endDate: string): Promise<IScheduleOverride[]> {
+    const all = await this.getByResource(resourceId);
+    return all.filter(o => o.date >= startDate && o.date <= endDate);
+  }
+
+  /**
+   * Save an override
+   */
+  async save(override: IScheduleOverride): Promise<void> {
+    return new Promise((resolve, reject) => {
+      const transaction = this.db.transaction([ScheduleOverrideStore.STORE_NAME], 'readwrite');
+      const store = transaction.objectStore(ScheduleOverrideStore.STORE_NAME);
+      const request = store.put(override);
+
+      request.onsuccess = () => resolve();
+      request.onerror = () => {
+        reject(new Error(`Failed to save override ${override.id}: ${request.error}`));
+      };
+    });
+  }
+
+  /**
+   * Delete an override
+   */
+  async delete(id: string): Promise<void> {
+    return new Promise((resolve, reject) => {
+      const transaction = this.db.transaction([ScheduleOverrideStore.STORE_NAME], 'readwrite');
+      const store = transaction.objectStore(ScheduleOverrideStore.STORE_NAME);
+      const request = store.delete(id);
+
+      request.onsuccess = () => resolve();
+      request.onerror = () => {
+        reject(new Error(`Failed to delete override ${id}: ${request.error}`));
+      };
+    });
+  }
+}

packages/calendar/src/extensions/schedules/ScheduleOverrideStore.ts

@@ -0,0 +1,21 @@
+import { IStore } from '../../storage/IStore';
+
+/**
+ * ScheduleOverrideStore - IndexedDB ObjectStore for schedule overrides
+ *
+ * Stores date-specific schedule overrides for resources.
+ * Indexes: resourceId, date, compound (resourceId + date)
+ */
+export class ScheduleOverrideStore implements IStore {
+  static readonly STORE_NAME = 'scheduleOverrides';
+  readonly storeName = ScheduleOverrideStore.STORE_NAME;
+
+  create(db: IDBDatabase): void {
+    const store = db.createObjectStore(ScheduleOverrideStore.STORE_NAME, { keyPath: 'id' });
+
+    store.createIndex('resourceId', 'resourceId', { unique: false });
+    store.createIndex('date', 'date', { unique: false });
+    store.createIndex('resourceId_date', ['resourceId', 'date'], { unique: true });
+    store.createIndex('syncStatus', 'syncStatus', { unique: false });
+  }
+}

packages/calendar/src/extensions/schedules/index.ts

@@ -0,0 +1,17 @@
+export { ScheduleOverrideService } from './ScheduleOverrideService';
+export { ScheduleOverrideStore } from './ScheduleOverrideStore';
+export { ResourceScheduleService } from './ResourceScheduleService';
+export type { IScheduleOverride, ITimeSlot, IWeekSchedule, WeekDay } from '../../types/ScheduleTypes';
+
+// DI registration helper
+import type { Builder } from '@novadi/core';
+import { IStore } from '../../storage/IStore';
+import { ScheduleOverrideStore } from './ScheduleOverrideStore';
+import { ScheduleOverrideService } from './ScheduleOverrideService';
+import { ResourceScheduleService } from './ResourceScheduleService';
+
+export function registerSchedules(builder: Builder): void {
+  builder.registerType(ScheduleOverrideStore).as<IStore>();
+  builder.registerType(ScheduleOverrideService).as<ScheduleOverrideService>();
+  builder.registerType(ResourceScheduleService).as<ResourceScheduleService>();
+}

packages/calendar/src/extensions/teams/TeamRenderer.ts

@@ -0,0 +1,25 @@
+import { BaseGroupingRenderer, IGroupingRendererConfig } from '../../core/BaseGroupingRenderer';
+import { TeamService } from './TeamService';
+import { ITeam } from '../../types/CalendarTypes';
+
+export class TeamRenderer extends BaseGroupingRenderer<ITeam> {
+  readonly type = 'team';
+
+  protected readonly config: IGroupingRendererConfig = {
+    elementTag: 'swp-team-header',
+    idAttribute: 'teamId',
+    colspanVar: '--team-cols'
+  };
+
+  constructor(private teamService: TeamService) {
+    super();
+  }
+
+  protected getEntities(ids: string[]): Promise<ITeam[]> {
+    return this.teamService.getByIds(ids);
+  }
+
+  protected getDisplayName(entity: ITeam): string {
+    return entity.name;
+  }
+}

packages/calendar/src/extensions/teams/TeamService.ts

@@ -0,0 +1,44 @@
+import { ITeam, EntityType, IEventBus } from '../../types/CalendarTypes';
+import { TeamStore } from './TeamStore';
+import { BaseEntityService } from '../../storage/BaseEntityService';
+import { IndexedDBContext } from '../../storage/IndexedDBContext';
+
+/**
+ * TeamService - CRUD operations for teams in IndexedDB
+ *
+ * Teams define which resources belong together for hierarchical grouping.
+ * Extends BaseEntityService for standard entity operations.
+ */
+export class TeamService extends BaseEntityService<ITeam> {
+  readonly storeName = TeamStore.STORE_NAME;
+  readonly entityType: EntityType = 'Team';
+
+  constructor(context: IndexedDBContext, eventBus: IEventBus) {
+    super(context, eventBus);
+  }
+
+  /**
+   * Get teams by IDs
+   */
+  async getByIds(ids: string[]): Promise<ITeam[]> {
+    if (ids.length === 0) return [];
+    const results = await Promise.all(ids.map(id => this.get(id)));
+    return results.filter((t): t is ITeam => t !== null);
+  }
+
+  /**
+   * Build reverse lookup: resourceId → teamId
+   */
+  async buildResourceToTeamMap(): Promise<Record<string, string>> {
+    const teams = await this.getAll();
+    const map: Record<string, string> = {};
+
+    for (const team of teams) {
+      for (const resourceId of team.resourceIds) {
+        map[resourceId] = team.id;
+      }
+    }
+
+    return map;
+  }
+}

packages/calendar/src/extensions/teams/TeamStore.ts

@@ -0,0 +1,13 @@
+import { IStore } from '../../storage/IStore';
+
+/**
+ * TeamStore - IndexedDB ObjectStore definition for teams
+ */
+export class TeamStore implements IStore {
+  static readonly STORE_NAME = 'teams';
+  readonly storeName = TeamStore.STORE_NAME;
+
+  create(db: IDBDatabase): void {
+    db.createObjectStore(TeamStore.STORE_NAME, { keyPath: 'id' });
+  }
+}

packages/calendar/src/extensions/teams/index.ts

@@ -0,0 +1,22 @@
+export { TeamRenderer } from './TeamRenderer';
+export { TeamService } from './TeamService';
+export { TeamStore } from './TeamStore';
+export type { ITeam } from '../../types/CalendarTypes';
+
+// DI registration helper
+import type { Builder } from '@novadi/core';
+import { IRenderer } from '../../core/IGroupingRenderer';
+import { IStore } from '../../storage/IStore';
+import { IEntityService } from '../../storage/IEntityService';
+import type { ITeam, ISync } from '../../types/CalendarTypes';
+import { TeamStore } from './TeamStore';
+import { TeamService } from './TeamService';
+import { TeamRenderer } from './TeamRenderer';
+
+export function registerTeams(builder: Builder): void {
+  builder.registerType(TeamStore).as<IStore>();
+  builder.registerType(TeamService).as<IEntityService<ITeam>>();
+  builder.registerType(TeamService).as<IEntityService<ISync>>();
+  builder.registerType(TeamService).as<TeamService>();
+  builder.registerType(TeamRenderer).as<IRenderer>();
+}

packages/calendar/src/features/date/DateRenderer.ts

@@ -0,0 +1,68 @@
+import { IRenderer, IRenderContext } from '../../core/IGroupingRenderer';
+import { DateService } from '../../core/DateService';
+
+export class DateRenderer implements IRenderer {
+  readonly type = 'date';
+
+  constructor(private dateService: DateService) {}
+
+  render(context: IRenderContext): void {
+    const dates = context.filter['date'] || [];
+    const resourceIds = context.filter['resource'] || [];
+
+    // Check if date headers should be hidden (e.g., in day view)
+    const dateGrouping = context.groupings?.find(g => g.type === 'date');
+    const hideHeader = dateGrouping?.hideHeader === true;
+
+    // Render dates for HVER resource (eller 1 gang hvis ingen resources)
+    const iterations = resourceIds.length || 1;
+    let columnCount = 0;
+
+    for (let r = 0; r < iterations; r++) {
+      const resourceId = resourceIds[r]; // undefined hvis ingen resources
+
+      for (const dateStr of dates) {
+        const date = this.dateService.parseISO(dateStr);
+
+        // Build columnKey for uniform identification
+        const segments: Record<string, string> = { date: dateStr };
+        if (resourceId) segments.resource = resourceId;
+        const columnKey = this.dateService.buildColumnKey(segments);
+
+        // Header
+        const header = document.createElement('swp-day-header');
+        header.dataset.date = dateStr;
+        header.dataset.columnKey = columnKey;
+        if (resourceId) {
+          header.dataset.resourceId = resourceId;
+        }
+        if (hideHeader) {
+          header.dataset.hidden = 'true';
+        }
+        header.innerHTML = `
+          <swp-day-name>${this.dateService.getDayName(date, 'short')}</swp-day-name>
+          <swp-day-date>${date.getDate()}</swp-day-date>
+        `;
+        context.headerContainer.appendChild(header);
+
+        // Column
+        const column = document.createElement('swp-day-column');
+        column.dataset.date = dateStr;
+        column.dataset.columnKey = columnKey;
+        if (resourceId) {
+          column.dataset.resourceId = resourceId;
+        }
+        column.innerHTML = '<swp-events-layer></swp-events-layer>';
+        context.columnContainer.appendChild(column);
+
+        columnCount++;
+      }
+    }
+
+    // Set grid columns on container
+    const container = context.columnContainer.closest('swp-calendar-container');
+    if (container) {
+      (container as HTMLElement).style.setProperty('--grid-columns', String(columnCount));
+    }
+  }
+}

packages/calendar/src/features/date/index.ts

@@ -0,0 +1 @@
+export { DateRenderer } from './DateRenderer';

packages/calendar/src/features/event/EventLayoutEngine.ts

@@ -0,0 +1,279 @@
+/**
+ * EventLayoutEngine - Simplified stacking/grouping algorithm
+ *
+ * Supports two layout modes:
+ * - GRID: Events starting at same time rendered side-by-side
+ * - STACKING: Overlapping events with margin-left offset (15px per level)
+ *
+ * No prev/next chains, single-pass greedy algorithm
+ */
+
+import { ICalendarEvent } from '../../types/CalendarTypes';
+import { IGridConfig } from '../../core/IGridConfig';
+import { calculateEventPosition } from '../../utils/PositionUtils';
+import { IColumnLayout, IGridGroupLayout, IStackedEventLayout } from './EventLayoutTypes';
+
+/**
+ * Check if two events overlap (strict - touching at boundary = NOT overlapping)
+ * This matches Scenario 8: end===start is NOT overlap
+ */
+export function eventsOverlap(a: ICalendarEvent, b: ICalendarEvent): boolean {
+  return a.start < b.end && a.end > b.start;
+}
+
+/**
+ * Check if two events are within threshold for grid grouping.
+ * This includes:
+ * 1. Start-to-start: Events start within threshold of each other
+ * 2. End-to-start: One event starts within threshold before another ends
+ */
+function eventsWithinThreshold(a: ICalendarEvent, b: ICalendarEvent, thresholdMinutes: number): boolean {
+  const thresholdMs = thresholdMinutes * 60 * 1000;
+
+  // Start-to-start: both events start within threshold
+  const startToStartDiff = Math.abs(a.start.getTime() - b.start.getTime());
+  if (startToStartDiff <= thresholdMs) return true;
+
+  // End-to-start: one event starts within threshold before the other ends
+  // B starts within threshold before A ends
+  const bStartsBeforeAEnds = a.end.getTime() - b.start.getTime();
+  if (bStartsBeforeAEnds > 0 && bStartsBeforeAEnds <= thresholdMs) return true;
+
+  // A starts within threshold before B ends
+  const aStartsBeforeBEnds = b.end.getTime() - a.start.getTime();
+  if (aStartsBeforeBEnds > 0 && aStartsBeforeBEnds <= thresholdMs) return true;
+
+  return false;
+}
+
+/**
+ * Check if all events in a group start within threshold of each other
+ */
+function allStartWithinThreshold(events: ICalendarEvent[], thresholdMinutes: number): boolean {
+  if (events.length <= 1) return true;
+
+  // Find earliest and latest start times
+  let earliest = events[0].start.getTime();
+  let latest = events[0].start.getTime();
+
+  for (const event of events) {
+    const time = event.start.getTime();
+    if (time < earliest) earliest = time;
+    if (time > latest) latest = time;
+  }
+
+  const diffMinutes = (latest - earliest) / (1000 * 60);
+  return diffMinutes <= thresholdMinutes;
+}
+
+/**
+ * Find groups of overlapping events (connected by overlap chain)
+ * Events are grouped if they overlap with any event in the group
+ */
+function findOverlapGroups(events: ICalendarEvent[]): ICalendarEvent[][] {
+  if (events.length === 0) return [];
+
+  const sorted = [...events].sort((a, b) => a.start.getTime() - b.start.getTime());
+  const used = new Set<string>();
+  const groups: ICalendarEvent[][] = [];
+
+  for (const event of sorted) {
+    if (used.has(event.id)) continue;
+
+    // Start a new group with this event
+    const group: ICalendarEvent[] = [event];
+    used.add(event.id);
+
+    // Expand group by finding all connected events (via overlap)
+    let expanded = true;
+    while (expanded) {
+      expanded = false;
+      for (const candidate of sorted) {
+        if (used.has(candidate.id)) continue;
+
+        // Check if candidate overlaps with any event in group
+        const connects = group.some(member => eventsOverlap(member, candidate));
+
+        if (connects) {
+          group.push(candidate);
+          used.add(candidate.id);
+          expanded = true;
+        }
+      }
+    }
+
+    groups.push(group);
+  }
+
+  return groups;
+}
+
+/**
+ * Find grid candidates within a group - events connected via threshold chain
+ * Uses V1 logic: events are connected if within threshold (no overlap requirement)
+ */
+function findGridCandidates(
+  events: ICalendarEvent[],
+  thresholdMinutes: number
+): ICalendarEvent[][] {
+  if (events.length === 0) return [];
+
+  const sorted = [...events].sort((a, b) => a.start.getTime() - b.start.getTime());
+  const used = new Set<string>();
+  const groups: ICalendarEvent[][] = [];
+
+  for (const event of sorted) {
+    if (used.has(event.id)) continue;
+
+    const group: ICalendarEvent[] = [event];
+    used.add(event.id);
+
+    // Expand by threshold chain (V1 logic: no overlap requirement, just threshold)
+    let expanded = true;
+    while (expanded) {
+      expanded = false;
+      for (const candidate of sorted) {
+        if (used.has(candidate.id)) continue;
+
+        const connects = group.some(member =>
+          eventsWithinThreshold(member, candidate, thresholdMinutes)
+        );
+
+        if (connects) {
+          group.push(candidate);
+          used.add(candidate.id);
+          expanded = true;
+        }
+      }
+    }
+
+    groups.push(group);
+  }
+
+  return groups;
+}
+
+/**
+ * Calculate stack levels for overlapping events using greedy algorithm
+ * For each event: level = max(overlapping already-processed events) + 1
+ */
+function calculateStackLevels(events: ICalendarEvent[]): Map<string, number> {
+  const levels = new Map<string, number>();
+  const sorted = [...events].sort((a, b) => a.start.getTime() - b.start.getTime());
+
+  for (const event of sorted) {
+    let maxOverlappingLevel = -1;
+
+    // Find max level among overlapping events already processed
+    for (const [id, level] of levels) {
+      const other = events.find(e => e.id === id);
+      if (other && eventsOverlap(event, other)) {
+        maxOverlappingLevel = Math.max(maxOverlappingLevel, level);
+      }
+    }
+
+    levels.set(event.id, maxOverlappingLevel + 1);
+  }
+
+  return levels;
+}
+
+/**
+ * Allocate events to columns for GRID layout using greedy algorithm
+ * Non-overlapping events can share a column to minimize total columns
+ */
+function allocateColumns(events: ICalendarEvent[]): ICalendarEvent[][] {
+  const sorted = [...events].sort((a, b) => a.start.getTime() - b.start.getTime());
+  const columns: ICalendarEvent[][] = [];
+
+  for (const event of sorted) {
+    // Find first column where event doesn't overlap with existing events
+    let placed = false;
+    for (const column of columns) {
+      const canFit = !column.some(e => eventsOverlap(event, e));
+      if (canFit) {
+        column.push(event);
+        placed = true;
+        break;
+      }
+    }
+
+    // No suitable column found, create new one
+    if (!placed) {
+      columns.push([event]);
+    }
+  }
+
+  return columns;
+}
+
+/**
+ * Main entry point: Calculate complete layout for a column's events
+ *
+ * Algorithm:
+ * 1. Find overlap groups (events connected by overlap chain)
+ * 2. For each overlap group, find grid candidates (events within threshold chain)
+ * 3. If all events in overlap group form a single grid candidate → GRID mode
+ * 4. Otherwise → STACKING mode with calculated levels
+ */
+export function calculateColumnLayout(
+  events: ICalendarEvent[],
+  config: IGridConfig
+): IColumnLayout {
+  const thresholdMinutes = config.gridStartThresholdMinutes ?? 10;
+
+  const result: IColumnLayout = {
+    grids: [],
+    stacked: []
+  };
+
+  if (events.length === 0) return result;
+
+  // Find all overlapping event groups
+  const overlapGroups = findOverlapGroups(events);
+
+  for (const overlapGroup of overlapGroups) {
+    if (overlapGroup.length === 1) {
+      // Single event - no grouping needed
+      result.stacked.push({
+        event: overlapGroup[0],
+        stackLevel: 0
+      });
+      continue;
+    }
+
+    // Within this overlap group, find grid candidates (threshold-connected subgroups)
+    const gridSubgroups = findGridCandidates(overlapGroup, thresholdMinutes);
+
+    // Check if the ENTIRE overlap group forms a single grid candidate
+    // This happens when all events are connected via threshold chain
+    const largestGridCandidate = gridSubgroups.reduce((max, g) =>
+      g.length > max.length ? g : max, gridSubgroups[0]);
+
+    if (largestGridCandidate.length === overlapGroup.length) {
+      // All events in overlap group are connected via threshold chain → GRID mode
+      const columns = allocateColumns(overlapGroup);
+      const earliest = overlapGroup.reduce((min, e) =>
+        e.start < min.start ? e : min, overlapGroup[0]);
+      const position = calculateEventPosition(earliest.start, earliest.end, config);
+
+      result.grids.push({
+        events: overlapGroup,
+        columns,
+        stackLevel: 0,
+        position: { top: position.top }
+      });
+    } else {
+      // Not all events connected via threshold → STACKING mode
+      const levels = calculateStackLevels(overlapGroup);
+      for (const event of overlapGroup) {
+        result.stacked.push({
+          event,
+          stackLevel: levels.get(event.id) ?? 0
+        });
+      }
+    }
+  }
+
+  return result;
+}

packages/calendar/src/features/event/EventLayoutTypes.ts

@@ -0,0 +1,35 @@
+import { ICalendarEvent } from '../../types/CalendarTypes';
+
+/**
+ * Stack link metadata stored on event elements
+ * Simplified from V1: No prev/next chains - only stackLevel needed for rendering
+ */
+export interface IStackLink {
+  stackLevel: number;
+}
+
+/**
+ * Layout result for a stacked event (overlapping events with margin offset)
+ */
+export interface IStackedEventLayout {
+  event: ICalendarEvent;
+  stackLevel: number;
+}
+
+/**
+ * Layout result for a grid group (simultaneous events side-by-side)
+ */
+export interface IGridGroupLayout {
+  events: ICalendarEvent[];
+  columns: ICalendarEvent[][];  // Events grouped by column (non-overlapping within column)
+  stackLevel: number;           // Stack level for entire group (if nested in another event)
+  position: { top: number };    // Top position of earliest event in pixels
+}
+
+/**
+ * Complete layout result for a column's events
+ */
+export interface IColumnLayout {
+  grids: IGridGroupLayout[];
+  stacked: IStackedEventLayout[];
+}

packages/calendar/src/features/event/EventRenderer.ts

@@ -0,0 +1,434 @@
+import { ICalendarEvent, IEventBus, IEventUpdatedPayload } from '../../types/CalendarTypes';
+import { EventService } from '../../storage/events/EventService';
+import { DateService } from '../../core/DateService';
+import { IGridConfig } from '../../core/IGridConfig';
+import { calculateEventPosition, snapToGrid, pixelsToMinutes } from '../../utils/PositionUtils';
+import { CoreEvents } from '../../constants/CoreEvents';
+import { IDragColumnChangePayload, IDragMovePayload, IDragEndPayload, IDragLeaveHeaderPayload } from '../../types/DragTypes';
+import { calculateColumnLayout } from './EventLayoutEngine';
+import { IGridGroupLayout } from './EventLayoutTypes';
+import { FilterTemplate } from '../../core/FilterTemplate';
+
+/**
+ * EventRenderer - Renders calendar events to the DOM
+ *
+ * CLEAN approach:
+ * - Only data-id attribute on event element
+ * - innerHTML contains only visible content
+ * - Event data retrieved via EventService when needed
+ */
+export class EventRenderer {
+  private container: HTMLElement | null = null;
+
+  constructor(
+    private eventService: EventService,
+    private dateService: DateService,
+    private gridConfig: IGridConfig,
+    private eventBus: IEventBus
+  ) {
+    this.setupListeners();
+  }
+
+  /**
+   * Setup listeners for drag-drop and update events
+   */
+  private setupListeners(): void {
+    this.eventBus.on(CoreEvents.EVENT_DRAG_COLUMN_CHANGE, (e) => {
+      const payload = (e as CustomEvent<IDragColumnChangePayload>).detail;
+      this.handleColumnChange(payload);
+    });
+
+    this.eventBus.on(CoreEvents.EVENT_DRAG_MOVE, (e) => {
+      const payload = (e as CustomEvent<IDragMovePayload>).detail;
+      this.updateDragTimestamp(payload);
+    });
+
+    this.eventBus.on(CoreEvents.EVENT_UPDATED, (e) => {
+      const payload = (e as CustomEvent<IEventUpdatedPayload>).detail;
+      this.handleEventUpdated(payload);
+    });
+
+    this.eventBus.on(CoreEvents.EVENT_DRAG_END, (e) => {
+      const payload = (e as CustomEvent<IDragEndPayload>).detail;
+      this.handleDragEnd(payload);
+    });
+
+    this.eventBus.on(CoreEvents.EVENT_DRAG_LEAVE_HEADER, (e) => {
+      const payload = (e as CustomEvent<IDragLeaveHeaderPayload>).detail;
+      this.handleDragLeaveHeader(payload);
+    });
+  }
+
+  /**
+   * Handle EVENT_DRAG_END - remove element if dropped in header
+   */
+  private handleDragEnd(payload: IDragEndPayload): void {
+    if (payload.target === 'header') {
+      // Event was dropped in header drawer - remove from grid
+      const element = this.container?.querySelector(`swp-content-viewport swp-event[data-event-id="${payload.swpEvent.eventId}"]`);
+      element?.remove();
+    }
+  }
+
+  /**
+   * Handle header item leaving header - create swp-event in grid
+   */
+  private handleDragLeaveHeader(payload: IDragLeaveHeaderPayload): void {
+    // Only handle when source is header (header item dragged to grid)
+    if (payload.source !== 'header') return;
+    if (!payload.targetColumn || !payload.start || !payload.end) return;
+
+    // Turn header item into ghost (stays visible but faded)
+    if (payload.element) {
+      payload.element.classList.add('drag-ghost');
+      payload.element.style.opacity = '0.3';
+      payload.element.style.pointerEvents = 'none';
+    }
+
+    // Create event object from header item data
+    const event: ICalendarEvent = {
+      id: payload.eventId,
+      title: payload.title || '',
+      description: '',
+      start: payload.start,
+      end: payload.end,
+      type: 'customer',
+      allDay: false,
+      syncStatus: 'pending'
+    };
+
+    // Create swp-event element using existing method
+    const element = this.createEventElement(event);
+
+    // Add to target column
+    let eventsLayer = payload.targetColumn.querySelector('swp-events-layer');
+    if (!eventsLayer) {
+      eventsLayer = document.createElement('swp-events-layer');
+      payload.targetColumn.appendChild(eventsLayer);
+    }
+    eventsLayer.appendChild(element);
+
+    // Mark as dragging so DragDropManager can continue with it
+    element.classList.add('dragging');
+  }
+
+  /**
+   * Handle EVENT_UPDATED - re-render affected columns
+   */
+  private async handleEventUpdated(payload: IEventUpdatedPayload): Promise<void> {
+    // Re-render source column (if different from target)
+    if (payload.sourceColumnKey !== payload.targetColumnKey) {
+      await this.rerenderColumn(payload.sourceColumnKey);
+    }
+
+    // Re-render target column
+    await this.rerenderColumn(payload.targetColumnKey);
+  }
+
+  /**
+   * Re-render a single column with fresh data from IndexedDB
+   */
+  private async rerenderColumn(columnKey: string): Promise<void> {
+    const column = this.findColumn(columnKey);
+    if (!column) return;
+
+    // Read date and resourceId directly from column attributes (columnKey is opaque)
+    const date = column.dataset.date;
+    const resourceId = column.dataset.resourceId;
+
+    if (!date) return;
+
+    // Get date range for this day
+    const startDate = new Date(date);
+    const endDate = new Date(date);
+    endDate.setHours(23, 59, 59, 999);
+
+    // Fetch events from IndexedDB
+    const events = resourceId
+      ? await this.eventService.getByResourceAndDateRange(resourceId, startDate, endDate)
+      : await this.eventService.getByDateRange(startDate, endDate);
+
+    // Filter to timed events and match date exactly
+    const timedEvents = events.filter(event =>
+      !event.allDay && this.dateService.getDateKey(event.start) === date
+    );
+
+    // Get or create events layer
+    let eventsLayer = column.querySelector('swp-events-layer');
+    if (!eventsLayer) {
+      eventsLayer = document.createElement('swp-events-layer');
+      column.appendChild(eventsLayer);
+    }
+
+    // Clear existing events
+    eventsLayer.innerHTML = '';
+
+    // Calculate layout with stacking/grouping
+    const layout = calculateColumnLayout(timedEvents, this.gridConfig);
+
+    // Render GRID groups
+    layout.grids.forEach(grid => {
+      const groupEl = this.renderGridGroup(grid);
+      eventsLayer!.appendChild(groupEl);
+    });
+
+    // Render STACKED events
+    layout.stacked.forEach(item => {
+      const eventEl = this.renderStackedEvent(item.event, item.stackLevel);
+      eventsLayer!.appendChild(eventEl);
+    });
+  }
+
+  /**
+   * Find a column element by columnKey
+   */
+  private findColumn(columnKey: string): HTMLElement | null {
+    if (!this.container) return null;
+    return this.container.querySelector(`swp-day-column[data-column-key="${columnKey}"]`) as HTMLElement;
+  }
+
+  /**
+   * Handle event moving to a new column during drag
+   */
+  private handleColumnChange(payload: IDragColumnChangePayload): void {
+    const eventsLayer = payload.newColumn.querySelector('swp-events-layer');
+    if (!eventsLayer) return;
+
+    // Move element to new column
+    eventsLayer.appendChild(payload.element);
+
+    // Preserve Y position
+    payload.element.style.top = `${payload.currentY}px`;
+  }
+
+  /**
+   * Update timestamp display during drag (snapped to grid)
+   */
+  private updateDragTimestamp(payload: IDragMovePayload): void {
+    const timeEl = payload.element.querySelector('swp-event-time');
+    if (!timeEl) return;
+
+    // Snap position to grid interval
+    const snappedY = snapToGrid(payload.currentY, this.gridConfig);
+
+    // Calculate new start time
+    const minutesFromGridStart = pixelsToMinutes(snappedY, this.gridConfig);
+    const startMinutes = (this.gridConfig.dayStartHour * 60) + minutesFromGridStart;
+
+    // Keep original duration (from element height)
+    const height = parseFloat(payload.element.style.height) || this.gridConfig.hourHeight;
+    const durationMinutes = pixelsToMinutes(height, this.gridConfig);
+
+    // Create Date objects for consistent formatting via DateService
+    const start = this.minutesToDate(startMinutes);
+    const end = this.minutesToDate(startMinutes + durationMinutes);
+
+    timeEl.textContent = this.dateService.formatTimeRange(start, end);
+  }
+
+  /**
+   * Convert minutes since midnight to a Date object (today)
+   */
+  private minutesToDate(minutes: number): Date {
+    const date = new Date();
+    date.setHours(Math.floor(minutes / 60) % 24, minutes % 60, 0, 0);
+    return date;
+  }
+
+  /**
+   * Render events for visible dates into day columns
+   * @param container - Calendar container element
+   * @param filter - Filter with 'date' and optionally 'resource' arrays
+   * @param filterTemplate - Template for matching events to columns
+   */
+  async render(container: HTMLElement, filter: Record<string, string[]>, filterTemplate: FilterTemplate): Promise<void> {
+    // Store container reference for later re-renders
+    this.container = container;
+
+    const visibleDates = filter['date'] || [];
+
+    if (visibleDates.length === 0) return;
+
+    // Get date range for query
+    const startDate = new Date(visibleDates[0]);
+    const endDate = new Date(visibleDates[visibleDates.length - 1]);
+    endDate.setHours(23, 59, 59, 999);
+
+    // Fetch events from IndexedDB
+    const events = await this.eventService.getByDateRange(startDate, endDate);
+
+    // Find day columns
+    const dayColumns = container.querySelector('swp-day-columns');
+    if (!dayColumns) return;
+
+    const columns = dayColumns.querySelectorAll('swp-day-column');
+
+    // Render events into each column based on FilterTemplate matching
+    columns.forEach(column => {
+      const columnEl = column as HTMLElement;
+
+      // Use FilterTemplate for matching - only fields in template are checked
+      const columnEvents = events.filter(event => filterTemplate.matches(event, columnEl));
+
+      // Get or create events layer
+      let eventsLayer = column.querySelector('swp-events-layer');
+      if (!eventsLayer) {
+        eventsLayer = document.createElement('swp-events-layer');
+        column.appendChild(eventsLayer);
+      }
+
+      // Clear existing events
+      eventsLayer.innerHTML = '';
+
+      // Filter to timed events only
+      const timedEvents = columnEvents.filter(event => !event.allDay);
+
+      // Calculate layout with stacking/grouping
+      const layout = calculateColumnLayout(timedEvents, this.gridConfig);
+
+      // Render GRID groups (simultaneous events side-by-side)
+      layout.grids.forEach(grid => {
+        const groupEl = this.renderGridGroup(grid);
+        eventsLayer!.appendChild(groupEl);
+      });
+
+      // Render STACKED events (overlapping with margin offset)
+      layout.stacked.forEach(item => {
+        const eventEl = this.renderStackedEvent(item.event, item.stackLevel);
+        eventsLayer!.appendChild(eventEl);
+      });
+    });
+  }
+
+  /**
+   * Create a single event element
+   *
+   * CLEAN approach:
+   * - Only data-id for lookup
+   * - Visible content in innerHTML only
+   */
+  private createEventElement(event: ICalendarEvent): HTMLElement {
+    const element = document.createElement('swp-event');
+
+    // Data attributes for SwpEvent compatibility
+    element.dataset.eventId = event.id;
+    if (event.resourceId) {
+      element.dataset.resourceId = event.resourceId;
+    }
+
+    // Calculate position
+    const position = calculateEventPosition(event.start, event.end, this.gridConfig);
+    element.style.top = `${position.top}px`;
+    element.style.height = `${position.height}px`;
+
+    // Color class based on event type
+    const colorClass = this.getColorClass(event);
+    if (colorClass) {
+      element.classList.add(colorClass);
+    }
+
+    // Visible content only
+    element.innerHTML = `
+      <swp-event-time>${this.dateService.formatTimeRange(event.start, event.end)}</swp-event-time>
+      <swp-event-title>${this.escapeHtml(event.title)}</swp-event-title>
+      ${event.description ? `<swp-event-description>${this.escapeHtml(event.description)}</swp-event-description>` : ''}
+    `;
+
+    return element;
+  }
+
+  /**
+   * Get color class based on metadata.color or event type
+   */
+  private getColorClass(event: ICalendarEvent): string {
+    // Check metadata.color first
+    if (event.metadata?.color) {
+      return `is-${event.metadata.color}`;
+    }
+
+    // Fallback to type-based color
+    const typeColors: Record<string, string> = {
+      'customer': 'is-blue',
+      'vacation': 'is-green',
+      'break': 'is-amber',
+      'meeting': 'is-purple',
+      'blocked': 'is-red'
+    };
+    return typeColors[event.type] || 'is-blue';
+  }
+
+  /**
+   * Escape HTML to prevent XSS
+   */
+  private escapeHtml(text: string): string {
+    const div = document.createElement('div');
+    div.textContent = text;
+    return div.innerHTML;
+  }
+
+  /**
+   * Render a GRID group with side-by-side columns
+   * Used when multiple events start at the same time
+   */
+  private renderGridGroup(layout: IGridGroupLayout): HTMLElement {
+    const group = document.createElement('swp-event-group');
+    group.classList.add(`cols-${layout.columns.length}`);
+    group.style.top = `${layout.position.top}px`;
+
+    // Stack level styling for entire group (if nested in another event)
+    if (layout.stackLevel > 0) {
+      group.style.marginLeft = `${layout.stackLevel * 15}px`;
+      group.style.zIndex = `${100 + layout.stackLevel}`;
+    }
+
+    // Calculate the height needed for the group (tallest event)
+    let maxBottom = 0;
+    for (const event of layout.events) {
+      const pos = calculateEventPosition(event.start, event.end, this.gridConfig);
+      const eventBottom = pos.top + pos.height;
+      if (eventBottom > maxBottom) maxBottom = eventBottom;
+    }
+    const groupHeight = maxBottom - layout.position.top;
+    group.style.height = `${groupHeight}px`;
+
+    // Create wrapper div for each column
+    layout.columns.forEach(columnEvents => {
+      const wrapper = document.createElement('div');
+      wrapper.style.position = 'relative';
+
+      columnEvents.forEach(event => {
+        const eventEl = this.createEventElement(event);
+        // Position relative to group top
+        const pos = calculateEventPosition(event.start, event.end, this.gridConfig);
+        eventEl.style.top = `${pos.top - layout.position.top}px`;
+        eventEl.style.position = 'absolute';
+        eventEl.style.left = '0';
+        eventEl.style.right = '0';
+        wrapper.appendChild(eventEl);
+      });
+
+      group.appendChild(wrapper);
+    });
+
+    return group;
+  }
+
+  /**
+   * Render a STACKED event with margin-left offset
+   * Used for overlapping events that don't start at the same time
+   */
+  private renderStackedEvent(event: ICalendarEvent, stackLevel: number): HTMLElement {
+    const element = this.createEventElement(event);
+
+    // Add stack metadata for drag-drop and other features
+    element.dataset.stackLink = JSON.stringify({ stackLevel });
+
+    // Visual styling based on stack level
+    if (stackLevel > 0) {
+      element.style.marginLeft = `${stackLevel * 15}px`;
+      element.style.zIndex = `${100 + stackLevel}`;
+    }
+
+    return element;
+  }
+}

packages/calendar/src/features/event/index.ts

@@ -0,0 +1 @@
+export { EventRenderer } from './EventRenderer';

packages/calendar/src/features/headerdrawer/HeaderDrawerLayoutEngine.ts

@@ -0,0 +1,135 @@
+/**
+ * HeaderDrawerLayoutEngine - Calculates row placement for header items
+ *
+ * Prevents visual overlap by assigning items to different rows when
+ * they occupy the same columns. Uses a track-based algorithm similar
+ * to V1's AllDayLayoutEngine.
+ *
+ * Each row can hold multiple items as long as they don't overlap in columns.
+ * When an item spans columns that are already occupied, it's placed in the
+ * next available row.
+ */
+
+export interface IHeaderItemLayout {
+  itemId: string;
+  gridArea: string;        // "row / col-start / row+1 / col-end"
+  startColumn: number;
+  endColumn: number;
+  row: number;
+}
+
+export interface IHeaderItemInput {
+  id: string;
+  columnStart: number;     // 0-based column index
+  columnEnd: number;       // 0-based end column (inclusive)
+}
+
+export class HeaderDrawerLayoutEngine {
+  private tracks: boolean[][] = [];
+  private columnCount: number;
+
+  constructor(columnCount: number) {
+    this.columnCount = columnCount;
+    this.reset();
+  }
+
+  /**
+   * Reset tracks for new layout calculation
+   */
+  reset(): void {
+    this.tracks = [new Array(this.columnCount).fill(false)];
+  }
+
+  /**
+   * Calculate layout for all items
+   * Items should be sorted by start column for optimal packing
+   */
+  calculateLayout(items: IHeaderItemInput[]): IHeaderItemLayout[] {
+    this.reset();
+    const layouts: IHeaderItemLayout[] = [];
+
+    for (const item of items) {
+      const row = this.findAvailableRow(item.columnStart, item.columnEnd);
+
+      // Mark columns as occupied in this row
+      for (let col = item.columnStart; col <= item.columnEnd; col++) {
+        this.tracks[row][col] = true;
+      }
+
+      // gridArea format: "row / col-start / row+1 / col-end"
+      // CSS grid uses 1-based indices
+      layouts.push({
+        itemId: item.id,
+        gridArea: `${row + 1} / ${item.columnStart + 1} / ${row + 2} / ${item.columnEnd + 2}`,
+        startColumn: item.columnStart,
+        endColumn: item.columnEnd,
+        row: row + 1  // 1-based for CSS
+      });
+    }
+
+    return layouts;
+  }
+
+  /**
+   * Calculate layout for a single new item
+   * Useful for real-time drag operations
+   */
+  calculateSingleLayout(item: IHeaderItemInput): IHeaderItemLayout {
+    const row = this.findAvailableRow(item.columnStart, item.columnEnd);
+
+    // Mark columns as occupied
+    for (let col = item.columnStart; col <= item.columnEnd; col++) {
+      this.tracks[row][col] = true;
+    }
+
+    return {
+      itemId: item.id,
+      gridArea: `${row + 1} / ${item.columnStart + 1} / ${row + 2} / ${item.columnEnd + 2}`,
+      startColumn: item.columnStart,
+      endColumn: item.columnEnd,
+      row: row + 1
+    };
+  }
+
+  /**
+   * Find the first row where all columns in range are available
+   */
+  private findAvailableRow(startCol: number, endCol: number): number {
+    for (let row = 0; row < this.tracks.length; row++) {
+      if (this.isRowAvailable(row, startCol, endCol)) {
+        return row;
+      }
+    }
+
+    // Add new row if all existing rows are occupied
+    this.tracks.push(new Array(this.columnCount).fill(false));
+    return this.tracks.length - 1;
+  }
+
+  /**
+   * Check if columns in range are all available in given row
+   */
+  private isRowAvailable(row: number, startCol: number, endCol: number): boolean {
+    for (let col = startCol; col <= endCol; col++) {
+      if (this.tracks[row][col]) {
+        return false;
+      }
+    }
+    return true;
+  }
+
+  /**
+   * Get the number of rows currently in use
+   */
+  getRowCount(): number {
+    return this.tracks.length;
+  }
+
+  /**
+   * Update column count (e.g., when view changes)
+   */
+  setColumnCount(count: number): void {
+    this.columnCount = count;
+    this.reset();
+  }
+}

packages/calendar/src/features/headerdrawer/HeaderDrawerRenderer.ts

@@ -0,0 +1,419 @@
+import { IEventBus, ICalendarEvent } from '../../types/CalendarTypes';
+import { IGridConfig } from '../../core/IGridConfig';
+import { CoreEvents } from '../../constants/CoreEvents';
+import { HeaderDrawerManager } from '../../core/HeaderDrawerManager';
+import { EventService } from '../../storage/events/EventService';
+import { DateService } from '../../core/DateService';
+import { FilterTemplate } from '../../core/FilterTemplate';
+import {
+  IDragEnterHeaderPayload,
+  IDragMoveHeaderPayload,
+  IDragLeaveHeaderPayload,
+  IDragEndPayload
+} from '../../types/DragTypes';
+
+/**
+ * Layout information for a header item
+ */
+interface IHeaderItemLayout {
+  event: ICalendarEvent;
+  columnKey: string;  // Opaque column identifier
+  row: number;        // 1-indexed
+  colStart: number;   // 1-indexed
+  colEnd: number;     // exclusive
+}
+
+/**
+ * HeaderDrawerRenderer - Handles rendering of items in the header drawer
+ *
+ * Listens to drag events from DragDropManager and creates/manages
+ * swp-header-item elements in the header drawer.
+ *
+ * Uses subgrid for column alignment with parent swp-calendar-header.
+ * Position items via gridArea for explicit row/column placement.
+ */
+export class HeaderDrawerRenderer {
+  private currentItem: HTMLElement | null = null;
+  private container: HTMLElement | null = null;
+  private sourceElement: HTMLElement | null = null;
+  private wasExpandedBeforeDrag = false;
+  private filterTemplate: FilterTemplate | null = null;
+
+  constructor(
+    private eventBus: IEventBus,
+    private gridConfig: IGridConfig,
+    private headerDrawerManager: HeaderDrawerManager,
+    private eventService: EventService,
+    private dateService: DateService
+  ) {
+    this.setupListeners();
+  }
+
+  /**
+   * Render allDay events into the header drawer with row stacking
+   * @param filterTemplate - Template for matching events to columns
+   */
+  async render(container: HTMLElement, filter: Record<string, string[]>, filterTemplate: FilterTemplate): Promise<void> {
+    // Store filterTemplate for buildColumnKeyFromEvent
+    this.filterTemplate = filterTemplate;
+
+    const drawer = container.querySelector('swp-header-drawer');
+    if (!drawer) return;
+
+    const visibleDates = filter['date'] || [];
+    if (visibleDates.length === 0) return;
+
+    // Get column keys from DOM for correct multi-resource positioning
+    const visibleColumnKeys = this.getVisibleColumnKeysFromDOM();
+    if (visibleColumnKeys.length === 0) return;
+
+    // Fetch events for date range
+    const startDate = new Date(visibleDates[0]);
+    const endDate = new Date(visibleDates[visibleDates.length - 1]);
+    endDate.setHours(23, 59, 59, 999);
+
+    const events = await this.eventService.getByDateRange(startDate, endDate);
+
+    // Filter to allDay events only (allDay !== false)
+    const allDayEvents = events.filter(event => event.allDay !== false);
+
+    // Clear existing items
+    drawer.innerHTML = '';
+
+    if (allDayEvents.length === 0) return;
+
+    // Calculate layout with row stacking using columnKeys
+    const layouts = this.calculateLayout(allDayEvents, visibleColumnKeys);
+    const rowCount = Math.max(1, ...layouts.map(l => l.row));
+
+    // Render each item with layout
+    layouts.forEach(layout => {
+      const item = this.createHeaderItem(layout);
+      drawer.appendChild(item);
+    });
+
+    // Expand drawer to fit all rows
+    this.headerDrawerManager.expandToRows(rowCount);
+  }
+
+  /**
+   * Create a header item element from layout
+   */
+  private createHeaderItem(layout: IHeaderItemLayout): HTMLElement {
+    const { event, columnKey, row, colStart, colEnd } = layout;
+
+    const item = document.createElement('swp-header-item');
+    item.dataset.eventId = event.id;
+    item.dataset.itemType = 'event';
+    item.dataset.start = event.start.toISOString();
+    item.dataset.end = event.end.toISOString();
+    item.dataset.columnKey = columnKey;
+    item.textContent = event.title;
+
+    // Color class
+    const colorClass = this.getColorClass(event);
+    if (colorClass) item.classList.add(colorClass);
+
+    // Grid position from layout
+    item.style.gridArea = `${row} / ${colStart} / ${row + 1} / ${colEnd}`;
+
+    return item;
+  }
+
+  /**
+   * Calculate layout for all events with row stacking
+   * Uses track-based algorithm to find available rows for overlapping events
+   */
+  private calculateLayout(events: ICalendarEvent[], visibleColumnKeys: string[]): IHeaderItemLayout[] {
+    // tracks[row][col] = occupied
+    const tracks: boolean[][] = [new Array(visibleColumnKeys.length).fill(false)];
+    const layouts: IHeaderItemLayout[] = [];
+
+    for (const event of events) {
+      // Build columnKey from event fields (only place we need to construct it)
+      const columnKey = this.buildColumnKeyFromEvent(event);
+      const startCol = visibleColumnKeys.indexOf(columnKey);
+      const endColumnKey = this.buildColumnKeyFromEvent(event, event.end);
+      const endCol = visibleColumnKeys.indexOf(endColumnKey);
+      if (startCol === -1 && endCol === -1) continue;
+
+      // Clamp til synlige kolonner
+      const colStart = Math.max(0, startCol);
+      const colEnd = (endCol !== -1 ? endCol : visibleColumnKeys.length - 1) + 1;
+
+      // Find ledig række
+      const row = this.findAvailableRow(tracks, colStart, colEnd);
+
+      // Marker som optaget
+      for (let c = colStart; c < colEnd; c++) {
+        tracks[row][c] = true;
+      }
+
+      layouts.push({ event, columnKey, row: row + 1, colStart: colStart + 1, colEnd: colEnd + 1 });
+    }
+
+    return layouts;
+  }
+
+  /**
+   * Build columnKey from event using FilterTemplate
+   * Uses the same template that columns use for matching
+   */
+  private buildColumnKeyFromEvent(event: ICalendarEvent, date?: Date): string {
+    if (!this.filterTemplate) {
+      // Fallback if no template - shouldn't happen in normal flow
+      const dateStr = this.dateService.getDateKey(date || event.start);
+      return dateStr;
+    }
+
+    // For multi-day events, we need to override the date in the event
+    if (date && date.getTime() !== event.start.getTime()) {
+      // Create temporary event with overridden start for key generation
+      const tempEvent = { ...event, start: date };
+      return this.filterTemplate.buildKeyFromEvent(tempEvent);
+    }
+
+    return this.filterTemplate.buildKeyFromEvent(event);
+  }
+
+  /**
+   * Find available row for event spanning columns [colStart, colEnd)
+   */
+  private findAvailableRow(tracks: boolean[][], colStart: number, colEnd: number): number {
+    for (let row = 0; row < tracks.length; row++) {
+      let available = true;
+      for (let c = colStart; c < colEnd; c++) {
+        if (tracks[row][c]) { available = false; break; }
+      }
+      if (available) return row;
+    }
+    // Ny række
+    tracks.push(new Array(tracks[0].length).fill(false));
+    return tracks.length - 1;
+  }
+
+  /**
+   * Get color class based on event metadata or type
+   */
+  private getColorClass(event: ICalendarEvent): string {
+    if (event.metadata?.color) {
+      return `is-${event.metadata.color}`;
+    }
+    const typeColors: Record<string, string> = {
+      'customer': 'is-blue',
+      'vacation': 'is-green',
+      'break': 'is-amber',
+      'meeting': 'is-purple',
+      'blocked': 'is-red'
+    };
+    return typeColors[event.type] || 'is-blue';
+  }
+
+  /**
+   * Setup event listeners for drag events
+   */
+  private setupListeners(): void {
+    this.eventBus.on(CoreEvents.EVENT_DRAG_ENTER_HEADER, (e) => {
+      const payload = (e as CustomEvent<IDragEnterHeaderPayload>).detail;
+      this.handleDragEnter(payload);
+    });
+
+    this.eventBus.on(CoreEvents.EVENT_DRAG_MOVE_HEADER, (e) => {
+      const payload = (e as CustomEvent<IDragMoveHeaderPayload>).detail;
+      this.handleDragMove(payload);
+    });
+
+    this.eventBus.on(CoreEvents.EVENT_DRAG_LEAVE_HEADER, (e) => {
+      const payload = (e as CustomEvent<IDragLeaveHeaderPayload>).detail;
+      this.handleDragLeave(payload);
+    });
+
+    this.eventBus.on(CoreEvents.EVENT_DRAG_END, (e) => {
+      const payload = (e as CustomEvent<IDragEndPayload>).detail;
+      this.handleDragEnd(payload);
+    });
+
+    this.eventBus.on(CoreEvents.EVENT_DRAG_CANCEL, () => {
+      this.cleanup();
+    });
+  }
+
+  /**
+   * Handle drag entering header zone - create preview item
+   */
+  private handleDragEnter(payload: IDragEnterHeaderPayload): void {
+    this.container = document.querySelector('swp-header-drawer');
+    if (!this.container) return;
+
+    // Remember if drawer was already expanded
+    this.wasExpandedBeforeDrag = this.headerDrawerManager.isExpanded();
+
+    // Expand to at least 1 row if collapsed, otherwise keep current height
+    if (!this.wasExpandedBeforeDrag) {
+      this.headerDrawerManager.expandToRows(1);
+    }
+
+    // Store reference to source element
+    this.sourceElement = payload.element;
+
+    // Create header item
+    const item = document.createElement('swp-header-item');
+    item.dataset.eventId = payload.eventId;
+    item.dataset.itemType = payload.itemType;
+    item.dataset.duration = String(payload.duration);
+    item.dataset.columnKey = payload.sourceColumnKey;
+    item.textContent = payload.title;
+
+    // Apply color class if present
+    if (payload.colorClass) {
+      item.classList.add(payload.colorClass);
+    }
+
+    // Add dragging state
+    item.classList.add('dragging');
+
+    // Initial placement (duration determines column span)
+    // gridArea format: "row / col-start / row+1 / col-end"
+    const col = payload.sourceColumnIndex + 1;
+    const endCol = col + payload.duration;
+    item.style.gridArea = `1 / ${col} / 2 / ${endCol}`;
+
+    this.container.appendChild(item);
+    this.currentItem = item;
+
+    // Hide original element while in header
+    payload.element.style.visibility = 'hidden';
+  }
+
+  /**
+   * Handle drag moving within header - update column position
+   */
+  private handleDragMove(payload: IDragMoveHeaderPayload): void {
+    if (!this.currentItem) return;
+
+    // Update column position
+    const col = payload.columnIndex + 1;
+    const duration = parseInt(this.currentItem.dataset.duration || '1', 10);
+    const endCol = col + duration;
+
+    this.currentItem.style.gridArea = `1 / ${col} / 2 / ${endCol}`;
+
+    // Update columnKey to new position
+    this.currentItem.dataset.columnKey = payload.columnKey;
+  }
+
+  /**
+   * Handle drag leaving header - cleanup for grid→header drag only
+   */
+  private handleDragLeave(payload: IDragLeaveHeaderPayload): void {
+    // Only cleanup for grid→header drag (when grid event leaves header back to grid)
+    // For header→grid drag, the header item stays as ghost until drop
+    if (payload.source === 'grid') {
+      this.cleanup();
+    }
+    // For header source, do nothing - ghost stays until EVENT_DRAG_END
+  }
+
+  /**
+   * Handle drag end - finalize based on drop target
+   */
+  private handleDragEnd(payload: IDragEndPayload): void {
+    if (payload.target === 'header') {
+      // Grid→Header: Finalize the header item (it stays in header)
+      if (this.currentItem) {
+        this.currentItem.classList.remove('dragging');
+        this.recalculateDrawerLayout();
+        this.currentItem = null;
+        this.sourceElement = null;
+      }
+    } else {
+      // Header→Grid: Remove ghost header item and recalculate
+      const ghost = document.querySelector(`swp-header-item.drag-ghost[data-event-id="${payload.swpEvent.eventId}"]`);
+      ghost?.remove();
+      this.recalculateDrawerLayout();
+    }
+  }
+
+  /**
+   * Recalculate layout for all items currently in the drawer
+   * Called after drop to reposition items and adjust height
+   */
+  private recalculateDrawerLayout(): void {
+    const drawer = document.querySelector('swp-header-drawer');
+    if (!drawer) return;
+
+    const items = Array.from(drawer.querySelectorAll('swp-header-item')) as HTMLElement[];
+    if (items.length === 0) return;
+
+    // Get visible column keys for correct multi-resource positioning
+    const visibleColumnKeys = this.getVisibleColumnKeysFromDOM();
+    if (visibleColumnKeys.length === 0) return;
+
+    // Build layout data from DOM items - use columnKey directly (opaque matching)
+    const itemData = items.map(item => ({
+      element: item,
+      columnKey: item.dataset.columnKey || '',
+      duration: parseInt(item.dataset.duration || '1', 10)
+    }));
+
+    // Calculate new layout using track algorithm
+    const tracks: boolean[][] = [new Array(visibleColumnKeys.length).fill(false)];
+
+    for (const item of itemData) {
+      // Direct columnKey matching - no parsing or construction needed
+      const startCol = visibleColumnKeys.indexOf(item.columnKey);
+      if (startCol === -1) continue;
+
+      const colStart = startCol;
+      const colEnd = Math.min(startCol + item.duration, visibleColumnKeys.length);
+
+      const row = this.findAvailableRow(tracks, colStart, colEnd);
+
+      for (let c = colStart; c < colEnd; c++) {
+        tracks[row][c] = true;
+      }
+
+      // Update element position
+      item.element.style.gridArea = `${row + 1} / ${colStart + 1} / ${row + 2} / ${colEnd + 1}`;
+    }
+
+    // Update drawer height
+    const rowCount = tracks.length;
+    this.headerDrawerManager.expandToRows(rowCount);
+  }
+
+  /**
+   * Get visible column keys from DOM (preserves order for multi-resource views)
+   * Uses filterTemplate.buildKeyFromColumn() for consistent key format with events
+   */
+  private getVisibleColumnKeysFromDOM(): string[] {
+    if (!this.filterTemplate) return [];
+    const columns = document.querySelectorAll('swp-day-column');
+    const columnKeys: string[] = [];
+    columns.forEach(col => {
+      const columnKey = this.filterTemplate!.buildKeyFromColumn(col as HTMLElement);
+      if (columnKey) columnKeys.push(columnKey);
+    });
+    return columnKeys;
+  }
+
+  /**
+   * Cleanup preview item and restore source visibility
+   */
+  private cleanup(): void {
+    // Remove preview item
+    this.currentItem?.remove();
+    this.currentItem = null;
+
+    // Restore source element visibility
+    if (this.sourceElement) {
+      this.sourceElement.style.visibility = '';
+      this.sourceElement = null;
+    }
+
+    // Collapse drawer if it wasn't expanded before drag
+    if (!this.wasExpandedBeforeDrag) {
+      this.headerDrawerManager.collapse();
+    }
+  }
+}

packages/calendar/src/features/headerdrawer/index.ts

@@ -0,0 +1,2 @@
+export { HeaderDrawerRenderer } from './HeaderDrawerRenderer';
+export { HeaderDrawerLayoutEngine, type IHeaderItemLayout, type IHeaderItemInput } from './HeaderDrawerLayoutEngine';

packages/calendar/src/features/resource/ResourceRenderer.ts

@@ -0,0 +1,69 @@
+import { IRenderContext } from '../../core/IGroupingRenderer';
+import { BaseGroupingRenderer, IGroupingRendererConfig } from '../../core/BaseGroupingRenderer';
+import { ResourceService } from '../../storage/resources/ResourceService';
+import { IResource } from '../../types/CalendarTypes';
+
+export class ResourceRenderer extends BaseGroupingRenderer<IResource> {
+  readonly type = 'resource';
+
+  protected readonly config: IGroupingRendererConfig = {
+    elementTag: 'swp-resource-header',
+    idAttribute: 'resourceId',
+    colspanVar: '--resource-cols'
+  };
+
+  constructor(private resourceService: ResourceService) {
+    super();
+  }
+
+  protected getEntities(ids: string[]): Promise<IResource[]> {
+    return this.resourceService.getByIds(ids);
+  }
+
+  protected getDisplayName(entity: IResource): string {
+    return entity.displayName;
+  }
+
+  /**
+   * Override render to handle:
+   * 1. Special ordering when parentChildMap exists (resources grouped by parent)
+   * 2. Different colspan calculation (just dateCount, not childCount * dateCount)
+   */
+  async render(context: IRenderContext): Promise<void> {
+    const resourceIds = context.filter['resource'] || [];
+    const dateCount = context.filter['date']?.length || 1;
+
+    // Determine render order based on parentChildMap
+    // If parentChildMap exists, render resources grouped by parent (e.g., team)
+    // Otherwise, render in filter order
+    let orderedResourceIds: string[];
+
+    if (context.parentChildMap) {
+      // Render resources in parent-child order
+      orderedResourceIds = [];
+      for (const childIds of Object.values(context.parentChildMap)) {
+        for (const childId of childIds) {
+          if (resourceIds.includes(childId)) {
+            orderedResourceIds.push(childId);
+          }
+        }
+      }
+    } else {
+      orderedResourceIds = resourceIds;
+    }
+
+    const resources = await this.getEntities(orderedResourceIds);
+
+    // Create a map for quick lookup to preserve order
+    const resourceMap = new Map(resources.map(r => [r.id, r]));
+
+    for (const resourceId of orderedResourceIds) {
+      const resource = resourceMap.get(resourceId);
+      if (!resource) continue;
+
+      const header = this.createHeader(resource, context);
+      header.style.gridColumn = `span ${dateCount}`;
+      context.headerContainer.appendChild(header);
+    }
+  }
+}

packages/calendar/src/features/resource/index.ts

@@ -0,0 +1 @@
+export { ResourceRenderer } from './ResourceRenderer';

packages/calendar/src/features/schedule/ScheduleRenderer.ts

@@ -0,0 +1,106 @@
+import { ResourceScheduleService } from '../../extensions/schedules/ResourceScheduleService';
+import { DateService } from '../../core/DateService';
+import { IGridConfig } from '../../core/IGridConfig';
+import { ITimeSlot } from '../../types/ScheduleTypes';
+
+/**
+ * ScheduleRenderer - Renders unavailable time zones in day columns
+ *
+ * Creates visual indicators for times outside the resource's working hours:
+ * - Before work start (e.g., 06:00 - 09:00)
+ * - After work end (e.g., 17:00 - 18:00)
+ * - Full day if resource is off (schedule = null)
+ */
+export class ScheduleRenderer {
+  constructor(
+    private scheduleService: ResourceScheduleService,
+    private dateService: DateService,
+    private gridConfig: IGridConfig
+  ) {}
+
+  /**
+   * Render unavailable zones for visible columns
+   * @param container - Calendar container element
+   * @param filter - Filter with 'date' and 'resource' arrays
+   */
+  async render(container: HTMLElement, filter: Record<string, string[]>): Promise<void> {
+    const dates = filter['date'] || [];
+    const resourceIds = filter['resource'] || [];
+
+    if (dates.length === 0) return;
+
+    // Find day columns
+    const dayColumns = container.querySelector('swp-day-columns');
+    if (!dayColumns) return;
+
+    const columns = dayColumns.querySelectorAll('swp-day-column');
+
+    for (const column of columns) {
+      const date = (column as HTMLElement).dataset.date;
+      const resourceId = (column as HTMLElement).dataset.resourceId;
+
+      if (!date || !resourceId) continue;
+
+      // Get or create unavailable layer
+      let unavailableLayer = column.querySelector('swp-unavailable-layer');
+      if (!unavailableLayer) {
+        unavailableLayer = document.createElement('swp-unavailable-layer');
+        column.insertBefore(unavailableLayer, column.firstChild);
+      }
+
+      // Clear existing
+      unavailableLayer.innerHTML = '';
+
+      // Get schedule for this resource/date
+      const schedule = await this.scheduleService.getScheduleForDate(resourceId, date);
+
+      // Render unavailable zones
+      this.renderUnavailableZones(unavailableLayer as HTMLElement, schedule);
+    }
+  }
+
+  /**
+   * Render unavailable time zones based on schedule
+   */
+  private renderUnavailableZones(layer: HTMLElement, schedule: ITimeSlot | null): void {
+    const dayStartMinutes = this.gridConfig.dayStartHour * 60;
+    const dayEndMinutes = this.gridConfig.dayEndHour * 60;
+    const minuteHeight = this.gridConfig.hourHeight / 60;
+
+    if (schedule === null) {
+      // Full day unavailable
+      const zone = this.createUnavailableZone(0, (dayEndMinutes - dayStartMinutes) * minuteHeight);
+      layer.appendChild(zone);
+      return;
+    }
+
+    const workStartMinutes = this.dateService.timeToMinutes(schedule.start);
+    const workEndMinutes = this.dateService.timeToMinutes(schedule.end);
+
+    // Before work start
+    if (workStartMinutes > dayStartMinutes) {
+      const top = 0;
+      const height = (workStartMinutes - dayStartMinutes) * minuteHeight;
+      const zone = this.createUnavailableZone(top, height);
+      layer.appendChild(zone);
+    }
+
+    // After work end
+    if (workEndMinutes < dayEndMinutes) {
+      const top = (workEndMinutes - dayStartMinutes) * minuteHeight;
+      const height = (dayEndMinutes - workEndMinutes) * minuteHeight;
+      const zone = this.createUnavailableZone(top, height);
+      layer.appendChild(zone);
+    }
+  }
+
+  /**
+   * Create an unavailable zone element
+   */
+  private createUnavailableZone(top: number, height: number): HTMLElement {
+    const zone = document.createElement('swp-unavailable-zone');
+    zone.style.top = `${top}px`;
+    zone.style.height = `${height}px`;
+    return zone;
+  }
+}

packages/calendar/src/features/schedule/index.ts

@@ -0,0 +1 @@
+export { ScheduleRenderer } from './ScheduleRenderer';

packages/calendar/src/features/timeaxis/TimeAxisRenderer.ts

@@ -0,0 +1,10 @@
+export class TimeAxisRenderer {
+  render(container: HTMLElement, startHour = 6, endHour = 20): void {
+    container.innerHTML = '';
+    for (let hour = startHour; hour <= endHour; hour++) {
+      const marker = document.createElement('swp-hour-marker');
+      marker.textContent = `${hour.toString().padStart(2, '0')}:00`;
+      container.appendChild(marker);
+    }
+  }
+}

packages/calendar/src/index.ts

@@ -0,0 +1,164 @@
+// === CORE ===
+
+// App
+export { CalendarApp } from './core/CalendarApp';
+export { CalendarOrchestrator } from './core/CalendarOrchestrator';
+export { CalendarEvents } from './core/CalendarEvents';
+export type {
+  RenderPayload,
+  WorkweekChangePayload,
+  ViewUpdatePayload
+} from './core/CalendarEvents';
+
+// Infrastructure
+export { EventBus } from './core/EventBus';
+export { DateService } from './core/DateService';
+export { ViewTemplate, ViewConfig, GroupingConfig } from './core/ViewConfig';
+export { IRenderer, IRenderContext } from './core/IGroupingRenderer';
+export { IGroupingStore } from './core/IGroupingStore';
+export { BaseGroupingRenderer, IGroupingRendererConfig } from './core/BaseGroupingRenderer';
+export { buildPipeline, Pipeline } from './core/RenderBuilder';
+export { NavigationAnimator } from './core/NavigationAnimator';
+export { ScrollManager } from './core/ScrollManager';
+export { HeaderDrawerManager } from './core/HeaderDrawerManager';
+export { FilterTemplate } from './core/FilterTemplate';
+export { EntityResolver } from './core/EntityResolver';
+export type { IEntityResolver } from './core/IEntityResolver';
+
+// Configuration interfaces
+export type { ITimeFormatConfig } from './core/ITimeFormatConfig';
+export type { IGridConfig } from './core/IGridConfig';
+
+// Core Features
+export { DateRenderer } from './features/date';
+export { ResourceRenderer } from './features/resource';
+export { EventRenderer } from './features/event';
+export { eventsOverlap, calculateColumnLayout } from './features/event/EventLayoutEngine';
+export type {
+  IStackLink,
+  IStackedEventLayout,
+  IGridGroupLayout,
+  IColumnLayout
+} from './features/event/EventLayoutTypes';
+export { TimeAxisRenderer } from './features/timeaxis/TimeAxisRenderer';
+export { HeaderDrawerRenderer, HeaderDrawerLayoutEngine } from './features/headerdrawer';
+export { ScheduleRenderer } from './features/schedule';
+
+// Core Storage
+export { IndexedDBContext, defaultDBConfig } from './storage/IndexedDBContext';
+export type { IDBConfig } from './storage/IndexedDBContext';
+export { BaseEntityService } from './storage/BaseEntityService';
+export type { IEntityService } from './storage/IEntityService';
+export type { IStore } from './storage/IStore';
+export { SyncPlugin } from './storage/SyncPlugin';
+
+// Event storage
+export { EventService } from './storage/events/EventService';
+export { EventStore } from './storage/events/EventStore';
+export { EventSerialization } from './storage/events/EventSerialization';
+
+// Resource storage
+export { ResourceService } from './storage/resources/ResourceService';
+export { ResourceStore } from './storage/resources/ResourceStore';
+
+// Settings storage
+export { SettingsService } from './storage/settings/SettingsService';
+export { SettingsStore } from './storage/settings/SettingsStore';
+
+// ViewConfig storage
+export { ViewConfigService } from './storage/viewconfigs/ViewConfigService';
+export { ViewConfigStore } from './storage/viewconfigs/ViewConfigStore';
+
+// Core Managers
+export { DragDropManager } from './managers/DragDropManager';
+export { EdgeScrollManager } from './managers/EdgeScrollManager';
+export { ResizeManager } from './managers/ResizeManager';
+export { EventPersistenceManager } from './managers/EventPersistenceManager';
+
+// Position utilities
+export {
+  calculateEventPosition,
+  minutesToPixels,
+  pixelsToMinutes,
+  snapToGrid
+} from './utils/PositionUtils';
+export type { EventPosition } from './utils/PositionUtils';
+
+// Types
+export type {
+  ICalendarEvent,
+  IResource,
+  IEventBus,
+  ISync,
+  SyncStatus,
+  EntityType,
+  CalendarEventType,
+  ResourceType,
+  ITeam,
+  IDepartment,
+  IBooking,
+  BookingStatus,
+  IBookingService,
+  ICustomer,
+  IDataEntity,
+  IEventLogEntry,
+  IListenerEntry,
+  IEntitySavedPayload,
+  IEntityDeletedPayload,
+  IEventUpdatedPayload
+} from './types/CalendarTypes';
+
+export type {
+  TenantSetting,
+  IGridSettings,
+  IWorkweekPreset
+} from './types/SettingsTypes';
+
+export type {
+  IScheduleOverride,
+  ITimeSlot,
+  IWeekSchedule,
+  WeekDay
+} from './types/ScheduleTypes';
+
+// Drag types
+export type {
+  IMousePosition,
+  IDragStartPayload,
+  IDragMovePayload,
+  IDragEndPayload,
+  IDragCancelPayload,
+  IDragColumnChangePayload,
+  IDragEnterHeaderPayload,
+  IDragMoveHeaderPayload,
+  IDragLeaveHeaderPayload
+} from './types/DragTypes';
+
+// Resize types
+export type {
+  IResizeStartPayload,
+  IResizeEndPayload
+} from './types/ResizeTypes';
+
+// Audit types
+export type {
+  IAuditEntry,
+  IAuditLoggedPayload
+} from './types/AuditTypes';
+
+export { SwpEvent } from './types/SwpEvent';
+
+// Core Events constants
+export { CoreEvents } from './constants/CoreEvents';
+
+// Repository interface (for custom implementations)
+export type { IApiRepository } from './repositories/IApiRepository';
+
+// DI helpers
+export {
+  createCalendarContainer,
+  registerCoreServices,
+  defaultTimeFormatConfig,
+  defaultGridConfig
+} from './CompositionRoot';
+export type { ICalendarOptions } from './CompositionRoot';

packages/calendar/src/managers/DragDropManager.ts

@@ -0,0 +1,581 @@
+import { IEventBus } from '../types/CalendarTypes';
+import { IGridConfig } from '../core/IGridConfig';
+import { CoreEvents } from '../constants/CoreEvents';
+import { snapToGrid } from '../utils/PositionUtils';
+import {
+  IMousePosition,
+  IDragStartPayload,
+  IDragMovePayload,
+  IDragEndPayload,
+  IDragCancelPayload,
+  IDragColumnChangePayload,
+  IDragEnterHeaderPayload,
+  IDragMoveHeaderPayload,
+  IDragLeaveHeaderPayload
+} from '../types/DragTypes';
+import { SwpEvent } from '../types/SwpEvent';
+
+interface DragState {
+  eventId: string;
+  element: HTMLElement;
+  ghostElement: HTMLElement | null;  // Null for header items
+  startY: number;
+  mouseOffset: IMousePosition;
+  columnElement: HTMLElement | null; // Null when starting from header
+  currentColumn: HTMLElement | null; // Null when in header
+  targetY: number;
+  currentY: number;
+  animationId: number;
+  sourceColumnKey: string;      // Source column key (where drag started)
+  dragSource: 'grid' | 'header'; // Where drag originated
+}
+
+/**
+ * DragDropManager - Handles drag-drop for calendar events
+ *
+ * Strategy: Drag original element, leave ghost-clone in place
+ * - mousedown: Store initial state, wait for movement
+ * - mousemove (>5px): Create ghost, start dragging original
+ * - mouseup: Snap to grid, remove ghost, emit drag:end
+ * - cancel: Animate back to startY, remove ghost
+ */
+export class DragDropManager {
+  private dragState: DragState | null = null;
+  private mouseDownPosition: IMousePosition | null = null;
+  private pendingElement: HTMLElement | null = null;
+  private pendingMouseOffset: IMousePosition | null = null;
+  private container: HTMLElement | null = null;
+  private inHeader = false;
+
+  private readonly DRAG_THRESHOLD = 5;
+  private readonly INTERPOLATION_FACTOR = 0.3;
+
+  constructor(
+    private eventBus: IEventBus,
+    private gridConfig: IGridConfig
+  ) {
+    this.setupScrollListener();
+  }
+
+  private setupScrollListener(): void {
+    this.eventBus.on(CoreEvents.EDGE_SCROLL_TICK, (e) => {
+      if (!this.dragState) return;
+      const { scrollDelta } = (e as CustomEvent<{ scrollDelta: number }>).detail;
+
+      // Element skal flytte med scroll for at forblive under musen
+      // (elementets top er relativ til kolonnen, som scroller med viewport)
+      this.dragState.targetY += scrollDelta;
+      this.dragState.currentY += scrollDelta;
+      this.dragState.element.style.top = `${this.dragState.currentY}px`;
+    });
+  }
+
+  /**
+   * Initialize drag-drop on a container element
+   */
+  init(container: HTMLElement): void {
+    this.container = container;
+    container.addEventListener('pointerdown', this.handlePointerDown);
+    document.addEventListener('pointermove', this.handlePointerMove);
+    document.addEventListener('pointerup', this.handlePointerUp);
+  }
+
+  private handlePointerDown = (e: PointerEvent): void => {
+    const target = e.target as HTMLElement;
+
+    // Ignore if clicking on resize handle
+    if (target.closest('swp-resize-handle')) return;
+
+    // Match both swp-event and swp-header-item
+    const eventElement = target.closest('swp-event') as HTMLElement;
+    const headerItem = target.closest('swp-header-item') as HTMLElement;
+    const draggable = eventElement || headerItem;
+
+    if (!draggable) return;
+
+    // Store for potential drag
+    this.mouseDownPosition = { x: e.clientX, y: e.clientY };
+    this.pendingElement = draggable;
+
+    // Calculate mouse offset within element
+    const rect = draggable.getBoundingClientRect();
+    this.pendingMouseOffset = {
+      x: e.clientX - rect.left,
+      y: e.clientY - rect.top
+    };
+
+    // Capture pointer for reliable tracking
+    draggable.setPointerCapture(e.pointerId);
+  };
+
+  private handlePointerMove = (e: PointerEvent): void => {
+    // Not in potential drag state
+    if (!this.mouseDownPosition || !this.pendingElement) {
+      // Already dragging - update target
+      if (this.dragState) {
+        this.updateDragTarget(e);
+      }
+      return;
+    }
+
+    // Check threshold
+    const deltaX = Math.abs(e.clientX - this.mouseDownPosition.x);
+    const deltaY = Math.abs(e.clientY - this.mouseDownPosition.y);
+    const distance = Math.sqrt(deltaX * deltaX + deltaY * deltaY);
+
+    if (distance < this.DRAG_THRESHOLD) return;
+
+    // Start drag
+    this.initializeDrag(this.pendingElement, this.pendingMouseOffset!, e);
+    this.mouseDownPosition = null;
+    this.pendingElement = null;
+    this.pendingMouseOffset = null;
+  };
+
+  private handlePointerUp = (_e: PointerEvent): void => {
+    // Clear pending state
+    this.mouseDownPosition = null;
+    this.pendingElement = null;
+    this.pendingMouseOffset = null;
+
+    if (!this.dragState) return;
+
+    // Stop animation
+    cancelAnimationFrame(this.dragState.animationId);
+
+    // Handle based on drag source and target
+    if (this.dragState.dragSource === 'header') {
+      // Header item drag end
+      this.handleHeaderItemDragEnd();
+    } else {
+      // Grid event drag end
+      this.handleGridEventDragEnd();
+    }
+
+    // Cleanup
+    this.dragState.element.classList.remove('dragging');
+    this.dragState = null;
+    this.inHeader = false;
+  };
+
+  /**
+   * Handle drag end for header items
+   */
+  private handleHeaderItemDragEnd(): void {
+    if (!this.dragState) return;
+
+    // If dropped in grid (not in header), the swp-event was already created
+    // by EventRenderer listening to EVENT_DRAG_LEAVE_HEADER
+    // Just emit drag:end for persistence
+
+    if (!this.inHeader && this.dragState.currentColumn) {
+      // Dropped in grid - emit drag:end with the new swp-event element
+      const gridEvent = this.dragState.currentColumn.querySelector(
+        `swp-event[data-event-id="${this.dragState.eventId}"]`
+      ) as HTMLElement;
+
+      if (gridEvent) {
+        const columnKey = this.dragState.currentColumn.dataset.columnKey || '';
+        const date = this.dragState.currentColumn.dataset.date || '';
+        const swpEvent = SwpEvent.fromElement(gridEvent, columnKey, date, this.gridConfig);
+
+        const payload: IDragEndPayload = {
+          swpEvent,
+          sourceColumnKey: this.dragState.sourceColumnKey,
+          target: 'grid'
+        };
+
+        this.eventBus.emit(CoreEvents.EVENT_DRAG_END, payload);
+      }
+    }
+    // If still in header, no persistence needed (stayed in header)
+  }
+
+  /**
+   * Handle drag end for grid events
+   */
+  private handleGridEventDragEnd(): void {
+    if (!this.dragState || !this.dragState.columnElement) return;
+
+    // Snap to grid
+    const snappedY = snapToGrid(this.dragState.currentY, this.gridConfig);
+    this.dragState.element.style.top = `${snappedY}px`;
+
+    // Remove ghost
+    this.dragState.ghostElement?.remove();
+
+    // Get columnKey and date from target column
+    const columnKey = this.dragState.columnElement.dataset.columnKey || '';
+    const date = this.dragState.columnElement.dataset.date || '';
+
+    // Create SwpEvent from element (reads top/height/eventId from element)
+    const swpEvent = SwpEvent.fromElement(
+      this.dragState.element,
+      columnKey,
+      date,
+      this.gridConfig
+    );
+
+    // Emit drag:end
+    const payload: IDragEndPayload = {
+      swpEvent,
+      sourceColumnKey: this.dragState.sourceColumnKey,
+      target: this.inHeader ? 'header' : 'grid'
+    };
+
+    this.eventBus.emit(CoreEvents.EVENT_DRAG_END, payload);
+  }
+
+  private initializeDrag(element: HTMLElement, mouseOffset: IMousePosition, e: PointerEvent): void {
+    const eventId = element.dataset.eventId || '';
+    const isHeaderItem = element.tagName.toLowerCase() === 'swp-header-item';
+    const columnElement = element.closest('swp-day-column') as HTMLElement;
+
+    // For grid events, we need a column
+    if (!isHeaderItem && !columnElement) return;
+
+    if (isHeaderItem) {
+      // Header item drag initialization
+      this.initializeHeaderItemDrag(element, mouseOffset, eventId);
+    } else {
+      // Grid event drag initialization
+      this.initializeGridEventDrag(element, mouseOffset, e, columnElement, eventId);
+    }
+  }
+
+  /**
+   * Initialize drag for a header item (allDay event)
+   */
+  private initializeHeaderItemDrag(element: HTMLElement, mouseOffset: IMousePosition, eventId: string): void {
+    // Mark as dragging
+    element.classList.add('dragging');
+
+    // Initialize drag state for header item
+    this.dragState = {
+      eventId,
+      element,
+      ghostElement: null,  // No ghost for header items
+      startY: 0,
+      mouseOffset,
+      columnElement: null,
+      currentColumn: null,
+      targetY: 0,
+      currentY: 0,
+      animationId: 0,
+      sourceColumnKey: '',  // Will be set from header item data
+      dragSource: 'header'
+    };
+
+    // Start in header mode
+    this.inHeader = true;
+  }
+
+  /**
+   * Initialize drag for a grid event
+   */
+  private initializeGridEventDrag(element: HTMLElement, mouseOffset: IMousePosition, e: PointerEvent, columnElement: HTMLElement, eventId: string): void {
+    // Calculate absolute Y position using getBoundingClientRect
+    const elementRect = element.getBoundingClientRect();
+    const columnRect = columnElement.getBoundingClientRect();
+    const startY = elementRect.top - columnRect.top;
+
+    // If event is inside a group, move it to events-layer for correct positioning during drag
+    const group = element.closest('swp-event-group');
+    if (group) {
+      const eventsLayer = columnElement.querySelector('swp-events-layer');
+      if (eventsLayer) {
+        eventsLayer.appendChild(element);
+      }
+    }
+
+    // Set consistent positioning for drag (works for both grouped and stacked events)
+    element.style.position = 'absolute';
+    element.style.top = `${startY}px`;
+    element.style.left = '2px';
+    element.style.right = '2px';
+    element.style.marginLeft = '0';  // Reset stacking margin
+
+    // Create ghost clone
+    const ghostElement = element.cloneNode(true) as HTMLElement;
+    ghostElement.classList.add('drag-ghost');
+    ghostElement.style.opacity = '0.3';
+    ghostElement.style.pointerEvents = 'none';
+
+    // Insert ghost before original
+    element.parentNode?.insertBefore(ghostElement, element);
+
+    // Setup element for dragging
+    element.classList.add('dragging');
+
+    // Calculate initial target from mouse position
+    const targetY = e.clientY - columnRect.top - mouseOffset.y;
+
+    // Initialize drag state
+    this.dragState = {
+      eventId,
+      element,
+      ghostElement,
+      startY,
+      mouseOffset,
+      columnElement,
+      currentColumn: columnElement,
+      targetY: Math.max(0, targetY),
+      currentY: startY,
+      animationId: 0,
+      sourceColumnKey: columnElement.dataset.columnKey || '',
+      dragSource: 'grid'
+    };
+
+    // Emit drag:start
+    const payload: IDragStartPayload = {
+      eventId,
+      element,
+      ghostElement,
+      startY,
+      mouseOffset,
+      columnElement
+    };
+
+    this.eventBus.emit(CoreEvents.EVENT_DRAG_START, payload);
+
+    // Start animation loop
+    this.animateDrag();
+  }
+
+  private updateDragTarget(e: PointerEvent): void {
+    if (!this.dragState) return;
+
+    // Check header zone first
+    this.checkHeaderZone(e);
+
+    // Skip normal grid handling if in header
+    if (this.inHeader) return;
+
+    // Check for column change
+    const columnAtPoint = this.getColumnAtPoint(e.clientX);
+
+    // For header items entering grid, set initial column
+    if (this.dragState.dragSource === 'header' && columnAtPoint && !this.dragState.currentColumn) {
+      this.dragState.currentColumn = columnAtPoint;
+      this.dragState.columnElement = columnAtPoint;
+    }
+
+    if (columnAtPoint && columnAtPoint !== this.dragState.currentColumn && this.dragState.currentColumn) {
+      const payload: IDragColumnChangePayload = {
+        eventId: this.dragState.eventId,
+        element: this.dragState.element,
+        previousColumn: this.dragState.currentColumn,
+        newColumn: columnAtPoint,
+        currentY: this.dragState.currentY
+      };
+
+      this.eventBus.emit(CoreEvents.EVENT_DRAG_COLUMN_CHANGE, payload);
+      this.dragState.currentColumn = columnAtPoint;
+      this.dragState.columnElement = columnAtPoint;
+    }
+
+    // Skip grid position updates if no column yet
+    if (!this.dragState.columnElement) return;
+
+    const columnRect = this.dragState.columnElement.getBoundingClientRect();
+    const targetY = e.clientY - columnRect.top - this.dragState.mouseOffset.y;
+
+    this.dragState.targetY = Math.max(0, targetY);
+
+    // Start animation if not running
+    if (!this.dragState.animationId) {
+      this.animateDrag();
+    }
+  }
+
+  /**
+   * Check if pointer is in header zone and emit appropriate events
+   */
+  private checkHeaderZone(e: PointerEvent): void {
+    if (!this.dragState) return;
+
+    const headerViewport = document.querySelector('swp-header-viewport');
+    if (!headerViewport) return;
+
+    const rect = headerViewport.getBoundingClientRect();
+    const isInHeader = e.clientY < rect.bottom;
+
+    if (isInHeader && !this.inHeader) {
+      // Entered header (from grid)
+      this.inHeader = true;
+
+      if (this.dragState.dragSource === 'grid' && this.dragState.columnElement) {
+        const payload: IDragEnterHeaderPayload = {
+          eventId: this.dragState.eventId,
+          element: this.dragState.element,
+          sourceColumnIndex: this.getColumnIndex(this.dragState.columnElement),
+          sourceColumnKey: this.dragState.columnElement.dataset.columnKey || '',
+          title: this.dragState.element.querySelector('swp-event-title')?.textContent || '',
+          colorClass: [...this.dragState.element.classList].find(c => c.startsWith('is-')),
+          itemType: 'event',
+          duration: 1
+        };
+
+        this.eventBus.emit(CoreEvents.EVENT_DRAG_ENTER_HEADER, payload);
+      }
+      // For header source re-entering header, just update inHeader flag
+    } else if (!isInHeader && this.inHeader) {
+      // Left header (entering grid)
+      this.inHeader = false;
+
+      const targetColumn = this.getColumnAtPoint(e.clientX);
+
+      if (this.dragState.dragSource === 'header') {
+        // Header item leaving header → create swp-event in grid
+        const payload: IDragLeaveHeaderPayload = {
+          eventId: this.dragState.eventId,
+          source: 'header',
+          element: this.dragState.element,
+          targetColumn: targetColumn || undefined,
+          start: this.dragState.element.dataset.start ? new Date(this.dragState.element.dataset.start) : undefined,
+          end: this.dragState.element.dataset.end ? new Date(this.dragState.element.dataset.end) : undefined,
+          title: this.dragState.element.textContent || '',
+          colorClass: [...this.dragState.element.classList].find(c => c.startsWith('is-'))
+        };
+
+        this.eventBus.emit(CoreEvents.EVENT_DRAG_LEAVE_HEADER, payload);
+
+        // Re-attach to the new swp-event created by EventRenderer
+        if (targetColumn) {
+          const newElement = targetColumn.querySelector(
+            `swp-event[data-event-id="${this.dragState.eventId}"]`
+          ) as HTMLElement;
+
+          if (newElement) {
+            this.dragState.element = newElement;
+            this.dragState.columnElement = targetColumn;
+            this.dragState.currentColumn = targetColumn;
+
+            // Start animation for the new element
+            this.animateDrag();
+          }
+        }
+      } else {
+        // Grid event leaving header → restore to grid
+        const payload: IDragLeaveHeaderPayload = {
+          eventId: this.dragState.eventId,
+          source: 'grid'
+        };
+
+        this.eventBus.emit(CoreEvents.EVENT_DRAG_LEAVE_HEADER, payload);
+      }
+    } else if (isInHeader) {
+      // Moving within header
+      const column = this.getColumnAtX(e.clientX);
+      if (column) {
+        const payload: IDragMoveHeaderPayload = {
+          eventId: this.dragState.eventId,
+          columnIndex: this.getColumnIndex(column),
+          columnKey: column.dataset.columnKey || ''
+        };
+
+        this.eventBus.emit(CoreEvents.EVENT_DRAG_MOVE_HEADER, payload);
+      }
+    }
+  }
+
+  /**
+   * Get column index (0-based) for a column element
+   */
+  private getColumnIndex(column: HTMLElement | null): number {
+    if (!this.container || !column) return 0;
+    const columns = Array.from(this.container.querySelectorAll('swp-day-column'));
+    return columns.indexOf(column);
+  }
+
+  /**
+   * Get column at X coordinate (alias for getColumnAtPoint)
+   */
+  private getColumnAtX(clientX: number): HTMLElement | null {
+    return this.getColumnAtPoint(clientX);
+  }
+
+  /**
+   * Find column element at given X coordinate
+   */
+  private getColumnAtPoint(clientX: number): HTMLElement | null {
+    if (!this.container) return null;
+
+    const columns = this.container.querySelectorAll('swp-day-column');
+    for (const col of columns) {
+      const rect = col.getBoundingClientRect();
+      if (clientX >= rect.left && clientX <= rect.right) {
+        return col as HTMLElement;
+      }
+    }
+    return null;
+  }
+
+  private animateDrag = (): void => {
+    if (!this.dragState) return;
+
+    const diff = this.dragState.targetY - this.dragState.currentY;
+
+    // Stop animation when close enough to target
+    if (Math.abs(diff) <= 0.5) {
+      this.dragState.animationId = 0;
+      return;
+    }
+
+    // Interpolate towards target
+    this.dragState.currentY += diff * this.INTERPOLATION_FACTOR;
+
+    // Update element position
+    this.dragState.element.style.top = `${this.dragState.currentY}px`;
+
+    // Emit drag:move (only if we have a column)
+    if (this.dragState.columnElement) {
+      const payload: IDragMovePayload = {
+        eventId: this.dragState.eventId,
+        element: this.dragState.element,
+        currentY: this.dragState.currentY,
+        columnElement: this.dragState.columnElement
+      };
+
+      this.eventBus.emit(CoreEvents.EVENT_DRAG_MOVE, payload);
+    }
+
+    // Continue animation
+    this.dragState.animationId = requestAnimationFrame(this.animateDrag);
+  };
+
+  /**
+   * Cancel drag and animate back to start position
+   */
+  cancelDrag(): void {
+    if (!this.dragState) return;
+
+    // Stop animation
+    cancelAnimationFrame(this.dragState.animationId);
+
+    const { element, ghostElement, startY, eventId } = this.dragState;
+
+    // Animate back to start
+    element.style.transition = 'top 200ms ease-out';
+    element.style.top = `${startY}px`;
+
+    // Remove ghost after animation (if exists)
+    setTimeout(() => {
+      ghostElement?.remove();
+      element.style.transition = '';
+      element.classList.remove('dragging');
+    }, 200);
+
+    // Emit drag:cancel
+    const payload: IDragCancelPayload = {
+      eventId,
+      element,
+      startY
+    };
+
+    this.eventBus.emit(CoreEvents.EVENT_DRAG_CANCEL, payload);
+
+    this.dragState = null;
+    this.inHeader = false;
+  }
+}

packages/calendar/src/managers/EdgeScrollManager.ts

@@ -0,0 +1,140 @@
+/**
+ * EdgeScrollManager - Auto-scroll when dragging near viewport edges
+ *
+ * 2-zone system:
+ * - Inner zone (0-50px): Fast scroll (640 px/sec)
+ * - Outer zone (50-100px): Slow scroll (140 px/sec)
+ */
+
+import { IEventBus } from '../types/CalendarTypes';
+import { CoreEvents } from '../constants/CoreEvents';
+
+export class EdgeScrollManager {
+  private scrollableContent: HTMLElement | null = null;
+  private timeGrid: HTMLElement | null = null;
+  private draggedElement: HTMLElement | null = null;
+  private scrollRAF: number | null = null;
+  private mouseY = 0;
+  private isDragging = false;
+  private isScrolling = false;
+  private lastTs = 0;
+  private rect: DOMRect | null = null;
+  private initialScrollTop = 0;
+
+  private readonly OUTER_ZONE = 100;
+  private readonly INNER_ZONE = 50;
+  private readonly SLOW_SPEED = 140;
+  private readonly FAST_SPEED = 640;
+
+  constructor(private eventBus: IEventBus) {
+    this.subscribeToEvents();
+    document.addEventListener('pointermove', this.trackMouse);
+  }
+
+  init(scrollableContent: HTMLElement): void {
+    this.scrollableContent = scrollableContent;
+    this.timeGrid = scrollableContent.querySelector('swp-time-grid');
+    this.scrollableContent.style.scrollBehavior = 'auto';
+  }
+
+  private trackMouse = (e: PointerEvent): void => {
+    if (this.isDragging) {
+      this.mouseY = e.clientY;
+    }
+  };
+
+  private subscribeToEvents(): void {
+    this.eventBus.on(CoreEvents.EVENT_DRAG_START, (event: Event) => {
+      const payload = (event as CustomEvent).detail;
+      this.draggedElement = payload.element;
+      this.startDrag();
+    });
+
+    this.eventBus.on(CoreEvents.EVENT_DRAG_END, () => this.stopDrag());
+    this.eventBus.on(CoreEvents.EVENT_DRAG_CANCEL, () => this.stopDrag());
+  }
+
+  private startDrag(): void {
+    this.isDragging = true;
+    this.isScrolling = false;
+    this.lastTs = 0;
+    this.initialScrollTop = this.scrollableContent?.scrollTop ?? 0;
+
+    if (this.scrollRAF === null) {
+      this.scrollRAF = requestAnimationFrame(this.scrollTick);
+    }
+  }
+
+  private stopDrag(): void {
+    this.isDragging = false;
+    this.setScrollingState(false);
+
+    if (this.scrollRAF !== null) {
+      cancelAnimationFrame(this.scrollRAF);
+      this.scrollRAF = null;
+    }
+
+    this.rect = null;
+    this.lastTs = 0;
+    this.initialScrollTop = 0;
+  }
+
+  private calculateVelocity(): number {
+    if (!this.rect) return 0;
+
+    const distTop = this.mouseY - this.rect.top;
+    const distBot = this.rect.bottom - this.mouseY;
+
+    if (distTop < this.INNER_ZONE) return -this.FAST_SPEED;
+    if (distTop < this.OUTER_ZONE) return -this.SLOW_SPEED;
+    if (distBot < this.INNER_ZONE) return this.FAST_SPEED;
+    if (distBot < this.OUTER_ZONE) return this.SLOW_SPEED;
+
+    return 0;
+  }
+
+  private isAtBoundary(velocity: number): boolean {
+    if (!this.scrollableContent || !this.timeGrid || !this.draggedElement) return false;
+
+    const atTop = this.scrollableContent.scrollTop <= 0 && velocity < 0;
+    const atBottom = velocity > 0 &&
+      this.draggedElement.getBoundingClientRect().bottom >=
+      this.timeGrid.getBoundingClientRect().bottom;
+
+    return atTop || atBottom;
+  }
+
+  private setScrollingState(scrolling: boolean): void {
+    if (this.isScrolling === scrolling) return;
+
+    this.isScrolling = scrolling;
+    if (scrolling) {
+      this.eventBus.emit(CoreEvents.EDGE_SCROLL_STARTED, {});
+    } else {
+      this.initialScrollTop = this.scrollableContent?.scrollTop ?? 0;
+      this.eventBus.emit(CoreEvents.EDGE_SCROLL_STOPPED, {});
+    }
+  }
+
+  private scrollTick = (ts: number): void => {
+    if (!this.isDragging || !this.scrollableContent) return;
+
+    const dt = this.lastTs ? (ts - this.lastTs) / 1000 : 0;
+    this.lastTs = ts;
+    this.rect ??= this.scrollableContent.getBoundingClientRect();
+
+    const velocity = this.calculateVelocity();
+
+    if (velocity !== 0 && !this.isAtBoundary(velocity)) {
+      const scrollDelta = velocity * dt;
+      this.scrollableContent.scrollTop += scrollDelta;
+      this.rect = null;
+      this.eventBus.emit(CoreEvents.EDGE_SCROLL_TICK, { scrollDelta });
+      this.setScrollingState(true);
+    } else {
+      this.setScrollingState(false);
+    }
+
+    this.scrollRAF = requestAnimationFrame(this.scrollTick);
+  };
+}

packages/calendar/src/managers/EventPersistenceManager.ts

@@ -0,0 +1,102 @@
+/**
+ * EventPersistenceManager - Persists event changes to IndexedDB
+ *
+ * Listens to drag/resize events and updates IndexedDB via EventService.
+ * This bridges the gap between UI interactions and data persistence.
+ */
+
+import { ICalendarEvent, IEventBus, IEventUpdatedPayload } from '../types/CalendarTypes';
+import { EventService } from '../storage/events/EventService';
+import { DateService } from '../core/DateService';
+import { CoreEvents } from '../constants/CoreEvents';
+import { IDragEndPayload } from '../types/DragTypes';
+import { IResizeEndPayload } from '../types/ResizeTypes';
+
+export class EventPersistenceManager {
+  constructor(
+    private eventService: EventService,
+    private eventBus: IEventBus,
+    private dateService: DateService
+  ) {
+    this.setupListeners();
+  }
+
+  private setupListeners(): void {
+    this.eventBus.on(CoreEvents.EVENT_DRAG_END, this.handleDragEnd);
+    this.eventBus.on(CoreEvents.EVENT_RESIZE_END, this.handleResizeEnd);
+  }
+
+  /**
+   * Handle drag end - update event position in IndexedDB
+   */
+  private handleDragEnd = async (e: Event): Promise<void> => {
+    const payload = (e as CustomEvent<IDragEndPayload>).detail;
+    const { swpEvent } = payload;
+
+    // Get existing event to merge with
+    const event = await this.eventService.get(swpEvent.eventId);
+    if (!event) {
+      console.warn(`EventPersistenceManager: Event ${swpEvent.eventId} not found`);
+      return;
+    }
+
+    // Parse resourceId from columnKey if present
+    const { resource } = this.dateService.parseColumnKey(swpEvent.columnKey);
+
+    // Update and save - start/end already calculated in SwpEvent
+    // Set allDay based on drop target:
+    // - header: allDay = true
+    // - grid: allDay = false (converts allDay event to timed)
+    const updatedEvent: ICalendarEvent = {
+      ...event,
+      start: swpEvent.start,
+      end: swpEvent.end,
+      resourceId: resource ?? event.resourceId,
+      allDay: payload.target === 'header',
+      syncStatus: 'pending'
+    };
+
+    await this.eventService.save(updatedEvent);
+
+    // Emit EVENT_UPDATED for EventRenderer to re-render affected columns
+    const updatePayload: IEventUpdatedPayload = {
+      eventId: updatedEvent.id,
+      sourceColumnKey: payload.sourceColumnKey,
+      targetColumnKey: swpEvent.columnKey
+    };
+    this.eventBus.emit(CoreEvents.EVENT_UPDATED, updatePayload);
+  };
+
+  /**
+   * Handle resize end - update event duration in IndexedDB
+   */
+  private handleResizeEnd = async (e: Event): Promise<void> => {
+    const payload = (e as CustomEvent<IResizeEndPayload>).detail;
+    const { swpEvent } = payload;
+
+    // Get existing event to merge with
+    const event = await this.eventService.get(swpEvent.eventId);
+    if (!event) {
+      console.warn(`EventPersistenceManager: Event ${swpEvent.eventId} not found`);
+      return;
+    }
+
+    // Update and save - end already calculated in SwpEvent
+    const updatedEvent: ICalendarEvent = {
+      ...event,
+      end: swpEvent.end,
+      syncStatus: 'pending'
+    };
+
+    await this.eventService.save(updatedEvent);
+
+    // Emit EVENT_UPDATED for EventRenderer to re-render the column
+    // Resize stays in same column, so source and target are the same
+    const updatePayload: IEventUpdatedPayload = {
+      eventId: updatedEvent.id,
+      sourceColumnKey: swpEvent.columnKey,
+      targetColumnKey: swpEvent.columnKey
+    };
+    this.eventBus.emit(CoreEvents.EVENT_UPDATED, updatePayload);
+  };
+}

packages/calendar/src/managers/ResizeManager.ts

@@ -0,0 +1,290 @@
+import { IEventBus } from '../types/CalendarTypes';
+import { IGridConfig } from '../core/IGridConfig';
+import { pixelsToMinutes, minutesToPixels, snapToGrid } from '../utils/PositionUtils';
+import { DateService } from '../core/DateService';
+import { CoreEvents } from '../constants/CoreEvents';
+import { IResizeStartPayload, IResizeEndPayload } from '../types/ResizeTypes';
+import { SwpEvent } from '../types/SwpEvent';
+
+/**
+ * ResizeManager - Handles resize of calendar events
+ *
+ * Step 1: Handle creation on mouseover (CSS handles visibility)
+ * Step 2: Pointer events + resize start
+ * Step 3: RAF animation for smooth height update
+ * Step 4: Grid snapping + timestamp update
+ */
+
+interface ResizeState {
+  eventId: string;
+  element: HTMLElement;
+  handleElement: HTMLElement;
+  startY: number;
+  startHeight: number;
+  startDurationMinutes: number;
+  pointerId: number;
+  prevZIndex: string;
+  // Animation state
+  currentHeight: number;
+  targetHeight: number;
+  animationId: number | null;
+}
+
+export class ResizeManager {
+  private container: HTMLElement | null = null;
+  private resizeState: ResizeState | null = null;
+
+  private readonly Z_INDEX_RESIZING = '1000';
+  private readonly ANIMATION_SPEED = 0.35;
+  private readonly MIN_HEIGHT_MINUTES = 15;
+
+  constructor(
+    private eventBus: IEventBus,
+    private gridConfig: IGridConfig,
+    private dateService: DateService
+  ) {}
+
+  /**
+   * Initialize resize functionality on container
+   */
+  init(container: HTMLElement): void {
+    this.container = container;
+
+    // Mouseover listener for handle creation (capture phase like V1)
+    container.addEventListener('mouseover', this.handleMouseOver, true);
+
+    // Pointer listeners for resize (capture phase like V1)
+    document.addEventListener('pointerdown', this.handlePointerDown, true);
+    document.addEventListener('pointermove', this.handlePointerMove, true);
+    document.addEventListener('pointerup', this.handlePointerUp, true);
+  }
+
+  /**
+   * Create resize handle element
+   */
+  private createResizeHandle(): HTMLElement {
+    const handle = document.createElement('swp-resize-handle');
+    handle.setAttribute('aria-label', 'Resize event');
+    handle.setAttribute('role', 'separator');
+    return handle;
+  }
+
+  /**
+   * Handle mouseover - create resize handle if not exists
+   */
+  private handleMouseOver = (e: Event): void => {
+    const target = e.target as HTMLElement;
+    const eventElement = target.closest('swp-event') as HTMLElement;
+
+    if (!eventElement || this.resizeState) return;
+
+    // Check if handle already exists
+    if (!eventElement.querySelector(':scope > swp-resize-handle')) {
+      const handle = this.createResizeHandle();
+      eventElement.appendChild(handle);
+    }
+  };
+
+  /**
+   * Handle pointerdown - start resize if on handle
+   */
+  private handlePointerDown = (e: PointerEvent): void => {
+    const handle = (e.target as HTMLElement).closest('swp-resize-handle') as HTMLElement;
+    if (!handle) return;
+
+    const element = handle.parentElement as HTMLElement;
+    if (!element) return;
+
+    const eventId = element.dataset.eventId || '';
+    const startHeight = element.offsetHeight;
+    const startDurationMinutes = pixelsToMinutes(startHeight, this.gridConfig);
+
+    // Store previous z-index
+    const container = element.closest('swp-event-group') as HTMLElement ?? element;
+    const prevZIndex = container.style.zIndex;
+
+    // Set resize state
+    this.resizeState = {
+      eventId,
+      element,
+      handleElement: handle,
+      startY: e.clientY,
+      startHeight,
+      startDurationMinutes,
+      pointerId: e.pointerId,
+      prevZIndex,
+      // Animation state
+      currentHeight: startHeight,
+      targetHeight: startHeight,
+      animationId: null
+    };
+
+    // Elevate z-index
+    container.style.zIndex = this.Z_INDEX_RESIZING;
+
+    // Capture pointer for smooth tracking
+    try {
+      handle.setPointerCapture(e.pointerId);
+    } catch (err) {
+      console.warn('Pointer capture failed:', err);
+    }
+
+    // Add global resizing class
+    document.documentElement.classList.add('swp--resizing');
+
+    // Emit resize start event
+    this.eventBus.emit(CoreEvents.EVENT_RESIZE_START, {
+      eventId,
+      element,
+      startHeight
+    } as IResizeStartPayload);
+
+    e.preventDefault();
+  };
+
+  /**
+   * Handle pointermove - update target height during resize
+   */
+  private handlePointerMove = (e: PointerEvent): void => {
+    if (!this.resizeState) return;
+
+    const deltaY = e.clientY - this.resizeState.startY;
+    const minHeight = (this.MIN_HEIGHT_MINUTES / 60) * this.gridConfig.hourHeight;
+    const newHeight = Math.max(minHeight, this.resizeState.startHeight + deltaY);
+
+    // Set target height for animation
+    this.resizeState.targetHeight = newHeight;
+
+    // Start animation if not running
+    if (this.resizeState.animationId === null) {
+      this.animateHeight();
+    }
+  };
+
+  /**
+   * RAF animation loop for smooth height interpolation
+   */
+  private animateHeight = (): void => {
+    if (!this.resizeState) return;
+
+    const diff = this.resizeState.targetHeight - this.resizeState.currentHeight;
+
+    // Stop animation when close enough
+    if (Math.abs(diff) < 0.5) {
+      this.resizeState.animationId = null;
+      return;
+    }
+
+    // Interpolate towards target (35% per frame like V1)
+    this.resizeState.currentHeight += diff * this.ANIMATION_SPEED;
+    this.resizeState.element.style.height = `${this.resizeState.currentHeight}px`;
+
+    // Update timestamp display (snapped)
+    this.updateTimestampDisplay();
+
+    // Continue animation
+    this.resizeState.animationId = requestAnimationFrame(this.animateHeight);
+  };
+
+  /**
+   * Update timestamp display with snapped end time
+   */
+  private updateTimestampDisplay(): void {
+    if (!this.resizeState) return;
+
+    const timeEl = this.resizeState.element.querySelector('swp-event-time');
+    if (!timeEl) return;
+
+    // Get start time from element position
+    const top = parseFloat(this.resizeState.element.style.top) || 0;
+    const startMinutesFromGrid = pixelsToMinutes(top, this.gridConfig);
+    const startMinutes = (this.gridConfig.dayStartHour * 60) + startMinutesFromGrid;
+
+    // Calculate snapped end time from current height
+    const snappedHeight = snapToGrid(this.resizeState.currentHeight, this.gridConfig);
+    const durationMinutes = pixelsToMinutes(snappedHeight, this.gridConfig);
+    const endMinutes = startMinutes + durationMinutes;
+
+    // Format and update
+    const start = this.minutesToDate(startMinutes);
+    const end = this.minutesToDate(endMinutes);
+    timeEl.textContent = this.dateService.formatTimeRange(start, end);
+  }
+
+  /**
+   * Convert minutes since midnight to Date
+   */
+  private minutesToDate(minutes: number): Date {
+    const date = new Date();
+    date.setHours(Math.floor(minutes / 60) % 24, minutes % 60, 0, 0);
+    return date;
+  };
+
+  /**
+   * Handle pointerup - finish resize
+   */
+  private handlePointerUp = (e: PointerEvent): void => {
+    if (!this.resizeState) return;
+
+    // Cancel any pending animation
+    if (this.resizeState.animationId !== null) {
+      cancelAnimationFrame(this.resizeState.animationId);
+    }
+
+    // Release pointer capture
+    try {
+      this.resizeState.handleElement.releasePointerCapture(e.pointerId);
+    } catch (err) {
+      console.warn('Pointer release failed:', err);
+    }
+
+    // Snap final height to grid
+    this.snapToGridFinal();
+
+    // Update timestamp one final time
+    this.updateTimestampDisplay();
+
+    // Restore z-index
+    const container = this.resizeState.element.closest('swp-event-group') as HTMLElement ?? this.resizeState.element;
+    container.style.zIndex = this.resizeState.prevZIndex;
+
+    // Remove global resizing class
+    document.documentElement.classList.remove('swp--resizing');
+
+    // Get columnKey and date from parent column
+    const column = this.resizeState.element.closest('swp-day-column') as HTMLElement;
+    const columnKey = column?.dataset.columnKey || '';
+    const date = column?.dataset.date || '';
+
+    // Create SwpEvent from element (reads top/height/eventId from element)
+    const swpEvent = SwpEvent.fromElement(
+      this.resizeState.element,
+      columnKey,
+      date,
+      this.gridConfig
+    );
+
+    // Emit resize end event
+    this.eventBus.emit(CoreEvents.EVENT_RESIZE_END, {
+      swpEvent
+    } as IResizeEndPayload);
+
+    // Reset state
+    this.resizeState = null;
+  };
+
+  /**
+   * Snap final height to grid interval
+   */
+  private snapToGridFinal(): void {
+    if (!this.resizeState) return;
+
+    const currentHeight = this.resizeState.element.offsetHeight;
+    const snappedHeight = snapToGrid(currentHeight, this.gridConfig);
+    const minHeight = minutesToPixels(this.MIN_HEIGHT_MINUTES, this.gridConfig);
+    const finalHeight = Math.max(minHeight, snappedHeight);
+
+    this.resizeState.element.style.height = `${finalHeight}px`;
+    this.resizeState.currentHeight = finalHeight;
+  }
+}

packages/calendar/src/repositories/IApiRepository.ts

@@ -0,0 +1,33 @@
+import { EntityType } from '../types/CalendarTypes';
+
+/**
+ * IApiRepository<T> - Generic interface for backend API communication
+ *
+ * Used by DataSeeder to fetch initial data and by SyncManager for sync operations.
+ */
+export interface IApiRepository<T> {
+  /**
+   * Entity type discriminator - used for runtime routing
+   */
+  readonly entityType: EntityType;
+
+  /**
+   * Send create operation to backend API
+   */
+  sendCreate(data: T): Promise<T>;
+
+  /**
+   * Send update operation to backend API
+   */
+  sendUpdate(id: string, updates: Partial<T>): Promise<T>;
+
+  /**
+   * Send delete operation to backend API
+   */
+  sendDelete(id: string): Promise<void>;
+
+  /**
+   * Fetch all entities from backend API
+   */
+  fetchAll(): Promise<T[]>;
+}

packages/calendar/src/storage/BaseEntityService.ts

@@ -0,0 +1,181 @@
+import { ISync, EntityType, SyncStatus, IEventBus, IEntitySavedPayload, IEntityDeletedPayload } from '../types/CalendarTypes';
+import { IEntityService } from './IEntityService';
+import { SyncPlugin } from './SyncPlugin';
+import { IndexedDBContext } from './IndexedDBContext';
+import { CoreEvents } from '../constants/CoreEvents';
+import { diff } from 'json-diff-ts';
+
+/**
+ * BaseEntityService<T extends ISync> - Abstract base class for all entity services
+ *
+ * PROVIDES:
+ * - Generic CRUD operations (get, getAll, save, delete)
+ * - Sync status management (delegates to SyncPlugin)
+ * - Serialization hooks (override in subclass if needed)
+ */
+export abstract class BaseEntityService<T extends ISync> implements IEntityService<T> {
+  abstract readonly storeName: string;
+  abstract readonly entityType: EntityType;
+
+  private syncPlugin: SyncPlugin<T>;
+  private context: IndexedDBContext;
+  protected eventBus: IEventBus;
+
+  constructor(context: IndexedDBContext, eventBus: IEventBus) {
+    this.context = context;
+    this.eventBus = eventBus;
+    this.syncPlugin = new SyncPlugin<T>(this);
+  }
+
+  protected get db(): IDBDatabase {
+    return this.context.getDatabase();
+  }
+
+  /**
+   * Serialize entity before storing in IndexedDB
+   */
+  protected serialize(entity: T): unknown {
+    return entity;
+  }
+
+  /**
+   * Deserialize data from IndexedDB back to entity
+   */
+  protected deserialize(data: unknown): T {
+    return data as T;
+  }
+
+  /**
+   * Get a single entity by ID
+   */
+  async get(id: string): Promise<T | null> {
+    return new Promise((resolve, reject) => {
+      const transaction = this.db.transaction([this.storeName], 'readonly');
+      const store = transaction.objectStore(this.storeName);
+      const request = store.get(id);
+
+      request.onsuccess = () => {
+        const data = request.result;
+        resolve(data ? this.deserialize(data) : null);
+      };
+
+      request.onerror = () => {
+        reject(new Error(`Failed to get ${this.entityType} ${id}: ${request.error}`));
+      };
+    });
+  }
+
+  /**
+   * Get all entities
+   */
+  async getAll(): Promise<T[]> {
+    return new Promise((resolve, reject) => {
+      const transaction = this.db.transaction([this.storeName], 'readonly');
+      const store = transaction.objectStore(this.storeName);
+      const request = store.getAll();
+
+      request.onsuccess = () => {
+        const data = request.result as unknown[];
+        const entities = data.map(item => this.deserialize(item));
+        resolve(entities);
+      };
+
+      request.onerror = () => {
+        reject(new Error(`Failed to get all ${this.entityType}s: ${request.error}`));
+      };
+    });
+  }
+
+  /**
+   * Save an entity (create or update)
+   * Emits ENTITY_SAVED event with operation type and changes (diff for updates)
+   * @param entity - Entity to save
+   * @param silent - If true, skip event emission (used for seeding)
+   */
+  async save(entity: T, silent = false): Promise<void> {
+    const entityId = (entity as unknown as { id: string }).id;
+    const existingEntity = await this.get(entityId);
+    const isCreate = existingEntity === null;
+
+    // Calculate changes: full entity for create, diff for update
+    let changes: unknown;
+    if (isCreate) {
+      changes = entity;
+    } else {
+      const existingSerialized = this.serialize(existingEntity);
+      const newSerialized = this.serialize(entity);
+      changes = diff(existingSerialized, newSerialized);
+    }
+
+    const serialized = this.serialize(entity);
+
+    return new Promise((resolve, reject) => {
+      const transaction = this.db.transaction([this.storeName], 'readwrite');
+      const store = transaction.objectStore(this.storeName);
+      const request = store.put(serialized);
+
+      request.onsuccess = () => {
+        // Only emit event if not silent (silent used for seeding)
+        if (!silent) {
+          const payload: IEntitySavedPayload = {
+            entityType: this.entityType,
+            entityId,
+            operation: isCreate ? 'create' : 'update',
+            changes,
+            timestamp: Date.now()
+          };
+          this.eventBus.emit(CoreEvents.ENTITY_SAVED, payload);
+        }
+        resolve();
+      };
+
+      request.onerror = () => {
+        reject(new Error(`Failed to save ${this.entityType} ${entityId}: ${request.error}`));
+      };
+    });
+  }
+
+  /**
+   * Delete an entity
+   * Emits ENTITY_DELETED event
+   */
+  async delete(id: string): Promise<void> {
+    return new Promise((resolve, reject) => {
+      const transaction = this.db.transaction([this.storeName], 'readwrite');
+      const store = transaction.objectStore(this.storeName);
+      const request = store.delete(id);
+
+      request.onsuccess = () => {
+        const payload: IEntityDeletedPayload = {
+          entityType: this.entityType,
+          entityId: id,
+          operation: 'delete',
+          timestamp: Date.now()
+        };
+        this.eventBus.emit(CoreEvents.ENTITY_DELETED, payload);
+        resolve();
+      };
+
+      request.onerror = () => {
+        reject(new Error(`Failed to delete ${this.entityType} ${id}: ${request.error}`));
+      };
+    });
+  }
+
+  // Sync methods - delegate to SyncPlugin
+  async markAsSynced(id: string): Promise<void> {
+    return this.syncPlugin.markAsSynced(id);
+  }
+
+  async markAsError(id: string): Promise<void> {
+    return this.syncPlugin.markAsError(id);
+  }
+
+  async getSyncStatus(id: string): Promise<SyncStatus | null> {
+    return this.syncPlugin.getSyncStatus(id);
+  }
+
+  async getBySyncStatus(syncStatus: string): Promise<T[]> {
+    return this.syncPlugin.getBySyncStatus(syncStatus);
+  }
+}

packages/calendar/src/storage/IEntityService.ts

@@ -0,0 +1,40 @@
+import { ISync, EntityType, SyncStatus } from '../types/CalendarTypes';
+
+/**
+ * IEntityService<T> - Generic interface for entity services with sync capabilities
+ *
+ * All entity services implement this interface to enable polymorphic operations.
+ */
+export interface IEntityService<T extends ISync> {
+  /**
+   * Entity type discriminator for runtime routing
+   */
+  readonly entityType: EntityType;
+
+  /**
+   * Get all entities from IndexedDB
+   */
+  getAll(): Promise<T[]>;
+
+  /**
+   * Save an entity (create or update) to IndexedDB
+   * @param entity - Entity to save
+   * @param silent - If true, skip event emission (used for seeding)
+   */
+  save(entity: T, silent?: boolean): Promise<void>;
+
+  /**
+   * Mark entity as successfully synced
+   */
+  markAsSynced(id: string): Promise<void>;
+
+  /**
+   * Mark entity as sync error
+   */
+  markAsError(id: string): Promise<void>;
+
+  /**
+   * Get current sync status for an entity
+   */
+  getSyncStatus(id: string): Promise<SyncStatus | null>;
+}

packages/calendar/src/storage/IStore.ts

@@ -0,0 +1,18 @@
+/**
+ * IStore - Interface for IndexedDB ObjectStore definitions
+ *
+ * Each entity store implements this interface to define its schema.
+ * Enables Open/Closed Principle: IndexedDBContext works with any IStore.
+ */
+export interface IStore {
+  /**
+   * The name of the ObjectStore in IndexedDB
+   */
+  readonly storeName: string;
+
+  /**
+   * Create the ObjectStore with its schema (indexes, keyPath, etc.)
+   * Called during database upgrade (onupgradeneeded event)
+   */
+  create(db: IDBDatabase): void;
+}

packages/calendar/src/storage/IndexedDBContext.ts

@@ -0,0 +1,108 @@
+import { IStore } from './IStore';
+
+/**
+ * Database configuration
+ */
+export interface IDBConfig {
+  dbName: string;
+  dbVersion?: number;
+}
+
+export const defaultDBConfig: IDBConfig = {
+  dbName: 'CalendarDB',
+  dbVersion: 4
+};
+
+/**
+ * IndexedDBContext - Database connection manager
+ *
+ * RESPONSIBILITY:
+ * - Opens and manages IDBDatabase connection lifecycle
+ * - Creates object stores via injected IStore implementations
+ * - Provides shared IDBDatabase instance to all services
+ */
+export class IndexedDBContext {
+  private db: IDBDatabase | null = null;
+  private initialized: boolean = false;
+  private stores: IStore[];
+  private config: IDBConfig;
+
+  constructor(stores: IStore[], config: IDBConfig) {
+    this.stores = stores;
+    this.config = config;
+  }
+
+  get dbName(): string {
+    return this.config.dbName;
+  }
+
+  /**
+   * Initialize and open the database
+   */
+  async initialize(): Promise<void> {
+    return new Promise((resolve, reject) => {
+      const request = indexedDB.open(this.config.dbName, this.config.dbVersion);
+
+      request.onerror = () => {
+        reject(new Error(`Failed to open IndexedDB: ${request.error}`));
+      };
+
+      request.onsuccess = () => {
+        this.db = request.result;
+        this.initialized = true;
+        resolve();
+      };
+
+      request.onupgradeneeded = (event) => {
+        const db = (event.target as IDBOpenDBRequest).result;
+
+        // Create all entity stores via injected IStore implementations
+        this.stores.forEach(store => {
+          if (!db.objectStoreNames.contains(store.storeName)) {
+            store.create(db);
+          }
+        });
+      };
+    });
+  }
+
+  /**
+   * Check if database is initialized
+   */
+  public isInitialized(): boolean {
+    return this.initialized;
+  }
+
+  /**
+   * Get IDBDatabase instance
+   */
+  public getDatabase(): IDBDatabase {
+    if (!this.db) {
+      throw new Error('IndexedDB not initialized. Call initialize() first.');
+    }
+    return this.db;
+  }
+
+  /**
+   * Close database connection
+   */
+  close(): void {
+    if (this.db) {
+      this.db.close();
+      this.db = null;
+      this.initialized = false;
+    }
+  }
+
+  /**
+   * Delete entire database (for testing/reset)
+   */
+  static async deleteDatabase(dbName: string = defaultDBConfig.dbName): Promise<void> {
+    return new Promise((resolve, reject) => {
+      const request = indexedDB.deleteDatabase(dbName);
+
+      request.onsuccess = () => resolve();
+      request.onerror = () => reject(new Error(`Failed to delete database: ${request.error}`));
+    });
+  }
+}

packages/calendar/src/storage/SyncPlugin.ts

@@ -0,0 +1,64 @@
+import { ISync, SyncStatus } from '../types/CalendarTypes';
+
+/**
+ * SyncPlugin<T extends ISync> - Pluggable sync functionality for entity services
+ *
+ * COMPOSITION PATTERN:
+ * - Encapsulates all sync-related logic in separate class
+ * - Composed into BaseEntityService (not inheritance)
+ */
+export class SyncPlugin<T extends ISync> {
+  constructor(private service: any) {}
+
+  /**
+   * Mark entity as successfully synced
+   */
+  async markAsSynced(id: string): Promise<void> {
+    const entity = await this.service.get(id);
+    if (entity) {
+      entity.syncStatus = 'synced';
+      await this.service.save(entity);
+    }
+  }
+
+  /**
+   * Mark entity as sync error
+   */
+  async markAsError(id: string): Promise<void> {
+    const entity = await this.service.get(id);
+    if (entity) {
+      entity.syncStatus = 'error';
+      await this.service.save(entity);
+    }
+  }
+
+  /**
+   * Get current sync status for an entity
+   */
+  async getSyncStatus(id: string): Promise<SyncStatus | null> {
+    const entity = await this.service.get(id);
+    return entity ? entity.syncStatus : null;
+  }
+
+  /**
+   * Get entities by sync status using IndexedDB index
+   */
+  async getBySyncStatus(syncStatus: string): Promise<T[]> {
+    return new Promise((resolve, reject) => {
+      const transaction = this.service.db.transaction([this.service.storeName], 'readonly');
+      const store = transaction.objectStore(this.service.storeName);
+      const index = store.index('syncStatus');
+      const request = index.getAll(syncStatus);
+
+      request.onsuccess = () => {
+        const data = request.result as unknown[];
+        const entities = data.map(item => this.service.deserialize(item));
+        resolve(entities);
+      };
+
+      request.onerror = () => {
+        reject(new Error(`Failed to get by sync status ${syncStatus}: ${request.error}`));
+      };
+    });
+  }
+}

packages/calendar/src/storage/events/EventSerialization.ts

@@ -0,0 +1,32 @@
+import { ICalendarEvent } from '../../types/CalendarTypes';
+
+/**
+ * EventSerialization - Handles Date field serialization for IndexedDB
+ *
+ * IndexedDB doesn't store Date objects directly, so we convert:
+ * - Date → ISO string (serialize) when writing
+ * - ISO string → Date (deserialize) when reading
+ */
+export class EventSerialization {
+  /**
+   * Serialize event for IndexedDB storage
+   */
+  static serialize(event: ICalendarEvent): unknown {
+    return {
+      ...event,
+      start: event.start instanceof Date ? event.start.toISOString() : event.start,
+      end: event.end instanceof Date ? event.end.toISOString() : event.end
+    };
+  }
+
+  /**
+   * Deserialize event from IndexedDB storage
+   */
+  static deserialize(data: Record<string, unknown>): ICalendarEvent {
+    return {
+      ...data,
+      start: typeof data.start === 'string' ? new Date(data.start) : data.start,
+      end: typeof data.end === 'string' ? new Date(data.end) : data.end
+    } as ICalendarEvent;
+  }
+}

packages/calendar/src/storage/events/EventService.ts

@@ -0,0 +1,84 @@
+import { ICalendarEvent, EntityType, IEventBus } from '../../types/CalendarTypes';
+import { EventStore } from './EventStore';
+import { EventSerialization } from './EventSerialization';
+import { BaseEntityService } from '../BaseEntityService';
+import { IndexedDBContext } from '../IndexedDBContext';
+
+/**
+ * EventService - CRUD operations for calendar events in IndexedDB
+ *
+ * Extends BaseEntityService for shared CRUD and sync logic.
+ * Provides event-specific query methods.
+ */
+export class EventService extends BaseEntityService<ICalendarEvent> {
+  readonly storeName = EventStore.STORE_NAME;
+  readonly entityType: EntityType = 'Event';
+
+  constructor(context: IndexedDBContext, eventBus: IEventBus) {
+    super(context, eventBus);
+  }
+
+  protected serialize(event: ICalendarEvent): unknown {
+    return EventSerialization.serialize(event);
+  }
+
+  protected deserialize(data: unknown): ICalendarEvent {
+    return EventSerialization.deserialize(data as Record<string, unknown>);
+  }
+
+  /**
+   * Get events within a date range
+   */
+  async getByDateRange(start: Date, end: Date): Promise<ICalendarEvent[]> {
+    return new Promise((resolve, reject) => {
+      const transaction = this.db.transaction([this.storeName], 'readonly');
+      const store = transaction.objectStore(this.storeName);
+      const index = store.index('start');
+
+      const range = IDBKeyRange.lowerBound(start.toISOString());
+      const request = index.getAll(range);
+
+      request.onsuccess = () => {
+        const data = request.result as unknown[];
+        const events = data
+          .map(item => this.deserialize(item))
+          .filter(event => event.start <= end);
+        resolve(events);
+      };
+
+      request.onerror = () => {
+        reject(new Error(`Failed to get events by date range: ${request.error}`));
+      };
+    });
+  }
+
+  /**
+   * Get events for a specific resource
+   */
+  async getByResource(resourceId: string): Promise<ICalendarEvent[]> {
+    return new Promise((resolve, reject) => {
+      const transaction = this.db.transaction([this.storeName], 'readonly');
+      const store = transaction.objectStore(this.storeName);
+      const index = store.index('resourceId');
+      const request = index.getAll(resourceId);
+
+      request.onsuccess = () => {
+        const data = request.result as unknown[];
+        const events = data.map(item => this.deserialize(item));
+        resolve(events);
+      };
+
+      request.onerror = () => {
+        reject(new Error(`Failed to get events for resource ${resourceId}: ${request.error}`));
+      };
+    });
+  }
+
+  /**
+   * Get events for a resource within a date range
+   */
+  async getByResourceAndDateRange(resourceId: string, start: Date, end: Date): Promise<ICalendarEvent[]> {
+    const resourceEvents = await this.getByResource(resourceId);
+    return resourceEvents.filter(event => event.start >= start && event.start <= end);
+  }
+}

packages/calendar/src/storage/events/EventStore.ts

@@ -0,0 +1,37 @@
+import { IStore } from '../IStore';
+
+/**
+ * EventStore - IndexedDB ObjectStore definition for calendar events
+ */
+export class EventStore implements IStore {
+  static readonly STORE_NAME = 'events';
+  readonly storeName = EventStore.STORE_NAME;
+
+  /**
+   * Create the events ObjectStore with indexes
+   */
+  create(db: IDBDatabase): void {
+    const store = db.createObjectStore(EventStore.STORE_NAME, { keyPath: 'id' });
+
+    // Index: start (for date range queries)
+    store.createIndex('start', 'start', { unique: false });
+
+    // Index: end (for date range queries)
+    store.createIndex('end', 'end', { unique: false });
+
+    // Index: syncStatus (for filtering by sync state)
+    store.createIndex('syncStatus', 'syncStatus', { unique: false });
+
+    // Index: resourceId (for resource-mode filtering)
+    store.createIndex('resourceId', 'resourceId', { unique: false });
+
+    // Index: customerId (for customer-centric queries)
+    store.createIndex('customerId', 'customerId', { unique: false });
+
+    // Index: bookingId (for event-to-booking lookups)
+    store.createIndex('bookingId', 'bookingId', { unique: false });
+
+    // Compound index: startEnd (for optimized range queries)
+    store.createIndex('startEnd', ['start', 'end'], { unique: false });
+  }
+}

packages/calendar/src/storage/resources/ResourceService.ts

@@ -0,0 +1,55 @@
+import { IResource, EntityType, IEventBus } from '../../types/CalendarTypes';
+import { ResourceStore } from './ResourceStore';
+import { BaseEntityService } from '../BaseEntityService';
+import { IndexedDBContext } from '../IndexedDBContext';
+
+/**
+ * ResourceService - CRUD operations for resources in IndexedDB
+ */
+export class ResourceService extends BaseEntityService<IResource> {
+  readonly storeName = ResourceStore.STORE_NAME;
+  readonly entityType: EntityType = 'Resource';
+
+  constructor(context: IndexedDBContext, eventBus: IEventBus) {
+    super(context, eventBus);
+  }
+
+  /**
+   * Get all active resources
+   */
+  async getActive(): Promise<IResource[]> {
+    const all = await this.getAll();
+    return all.filter(r => r.isActive !== false);
+  }
+
+  /**
+   * Get resources by IDs
+   */
+  async getByIds(ids: string[]): Promise<IResource[]> {
+    if (ids.length === 0) return [];
+
+    const results = await Promise.all(ids.map(id => this.get(id)));
+    return results.filter((r): r is IResource => r !== null);
+  }
+
+  /**
+   * Get resources by type
+   */
+  async getByType(type: string): Promise<IResource[]> {
+    return new Promise((resolve, reject) => {
+      const transaction = this.db.transaction([this.storeName], 'readonly');
+      const store = transaction.objectStore(this.storeName);
+      const index = store.index('type');
+      const request = index.getAll(type);
+
+      request.onsuccess = () => {
+        const data = request.result as IResource[];
+        resolve(data);
+      };
+
+      request.onerror = () => {
+        reject(new Error(`Failed to get resources by type ${type}: ${request.error}`));
+      };
+    });
+  }
+}

packages/calendar/src/storage/resources/ResourceStore.ts

@@ -0,0 +1,17 @@
+import { IStore } from '../IStore';
+
+/**
+ * ResourceStore - IndexedDB ObjectStore definition for resources
+ */
+export class ResourceStore implements IStore {
+  static readonly STORE_NAME = 'resources';
+  readonly storeName = ResourceStore.STORE_NAME;
+
+  create(db: IDBDatabase): void {
+    const store = db.createObjectStore(ResourceStore.STORE_NAME, { keyPath: 'id' });
+
+    store.createIndex('type', 'type', { unique: false });
+    store.createIndex('syncStatus', 'syncStatus', { unique: false });
+    store.createIndex('isActive', 'isActive', { unique: false });
+  }
+}

packages/calendar/src/storage/settings/SettingsService.ts

@@ -0,0 +1,83 @@
+import { EntityType, IEventBus } from '../../types/CalendarTypes';
+import {
+  TenantSetting,
+  IWorkweekSettings,
+  IGridSettings,
+  ITimeFormatSettings,
+  IViewSettings,
+  IWorkweekPreset,
+  SettingsIds
+} from '../../types/SettingsTypes';
+import { SettingsStore } from './SettingsStore';
+import { BaseEntityService } from '../BaseEntityService';
+import { IndexedDBContext } from '../IndexedDBContext';
+
+/**
+ * SettingsService - CRUD operations for tenant settings
+ *
+ * Settings are stored as separate records per section.
+ * This service provides typed methods for accessing specific settings.
+ */
+export class SettingsService extends BaseEntityService<TenantSetting> {
+  readonly storeName = SettingsStore.STORE_NAME;
+  readonly entityType: EntityType = 'Settings';
+
+  constructor(context: IndexedDBContext, eventBus: IEventBus) {
+    super(context, eventBus);
+  }
+
+  /**
+   * Get workweek settings
+   */
+  async getWorkweekSettings(): Promise<IWorkweekSettings | null> {
+    return this.get(SettingsIds.WORKWEEK) as Promise<IWorkweekSettings | null>;
+  }
+
+  /**
+   * Get grid settings
+   */
+  async getGridSettings(): Promise<IGridSettings | null> {
+    return this.get(SettingsIds.GRID) as Promise<IGridSettings | null>;
+  }
+
+  /**
+   * Get time format settings
+   */
+  async getTimeFormatSettings(): Promise<ITimeFormatSettings | null> {
+    return this.get(SettingsIds.TIME_FORMAT) as Promise<ITimeFormatSettings | null>;
+  }
+
+  /**
+   * Get view settings
+   */
+  async getViewSettings(): Promise<IViewSettings | null> {
+    return this.get(SettingsIds.VIEWS) as Promise<IViewSettings | null>;
+  }
+
+  /**
+   * Get workweek preset by ID
+   */
+  async getWorkweekPreset(presetId: string): Promise<IWorkweekPreset | null> {
+    const settings = await this.getWorkweekSettings();
+    if (!settings) return null;
+    return settings.presets[presetId] || null;
+  }
+
+  /**
+   * Get the default workweek preset
+   */
+  async getDefaultWorkweekPreset(): Promise<IWorkweekPreset | null> {
+    const settings = await this.getWorkweekSettings();
+    if (!settings) return null;
+    return settings.presets[settings.defaultPreset] || null;
+  }
+
+  /**
+   * Get all available workweek presets
+   */
+  async getWorkweekPresets(): Promise<IWorkweekPreset[]> {
+    const settings = await this.getWorkweekSettings();
+    if (!settings) return [];
+    return Object.values(settings.presets);
+  }
+}

packages/calendar/src/storage/settings/SettingsStore.ts

@@ -0,0 +1,16 @@
+import { IStore } from '../IStore';
+
+/**
+ * SettingsStore - IndexedDB ObjectStore definition for tenant settings
+ *
+ * Single store for all settings sections. Settings are stored as one document
+ * per tenant with id='tenant-settings'.
+ */
+export class SettingsStore implements IStore {
+  static readonly STORE_NAME = 'settings';
+  readonly storeName = SettingsStore.STORE_NAME;
+
+  create(db: IDBDatabase): void {
+    db.createObjectStore(SettingsStore.STORE_NAME, { keyPath: 'id' });
+  }
+}

packages/calendar/src/storage/viewconfigs/ViewConfigService.ts

@@ -0,0 +1,18 @@
+import { EntityType, IEventBus } from '../../types/CalendarTypes';
+import { ViewConfig } from '../../core/ViewConfig';
+import { ViewConfigStore } from './ViewConfigStore';
+import { BaseEntityService } from '../BaseEntityService';
+import { IndexedDBContext } from '../IndexedDBContext';
+
+export class ViewConfigService extends BaseEntityService<ViewConfig> {
+  readonly storeName = ViewConfigStore.STORE_NAME;
+  readonly entityType: EntityType = 'ViewConfig';
+
+  constructor(context: IndexedDBContext, eventBus: IEventBus) {
+    super(context, eventBus);
+  }
+
+  async getById(id: string): Promise<ViewConfig | null> {
+    return this.get(id);
+  }
+}

packages/calendar/src/storage/viewconfigs/ViewConfigStore.ts

@@ -0,0 +1,10 @@
+import { IStore } from '../IStore';
+
+export class ViewConfigStore implements IStore {
+  static readonly STORE_NAME = 'viewconfigs';
+  readonly storeName = ViewConfigStore.STORE_NAME;
+
+  create(db: IDBDatabase): void {
+    db.createObjectStore(ViewConfigStore.STORE_NAME, { keyPath: 'id' });
+  }
+}