Adds comprehensive Settings page with multiple configuration tabs

Introduces a new Settings page with configurable modules:
- General company information
- Calendar and booking settings
- Billing and payment configurations
- Tracking and analytics integrations

Implements modular ViewComponents for each settings section
Enhances user experience with toggle switches and detailed configuration options

PlanTempus.Application/Features/Settings/Pages/Index.cshtml

@@ -0,0 +1,110 @@
+@page "/indstillinger"
+@using PlanTempus.Application.Features.Settings.Pages
+@model PlanTempus.Application.Features.Settings.Pages.IndexModel
+@{
+    ViewData["Title"] = "Indstillinger";
+}
+
+<!-- Sticky Header with Tabs -->
+<swp-sticky-header>
+    <swp-header-content>
+        <swp-page-header>
+            <swp-page-title>
+                <i class="ph ph-gear"></i>
+                <span localize="settings.title">Indstillinger</span>
+            </swp-page-title>
+        </swp-page-header>
+    </swp-header-content>
+
+    <!-- Tab Bar -->
+    <swp-tab-bar>
+        <swp-tab class="active" data-tab="general">
+            <i class="ph ph-buildings"></i>
+            <span localize="settings.tabs.company">Virksomhed</span>
+        </swp-tab>
+        <swp-tab data-tab="calendar">
+            <i class="ph ph-calendar"></i>
+            <span localize="settings.tabs.calendar">Kalender</span>
+        </swp-tab>
+        <swp-tab data-tab="booking">
+            <i class="ph ph-globe"></i>
+            <span localize="settings.tabs.booking">Online Booking</span>
+        </swp-tab>
+        <swp-tab data-tab="billing">
+            <i class="ph ph-receipt"></i>
+            <span localize="settings.tabs.billing">Faktura & Kvittering</span>
+        </swp-tab>
+        <swp-tab data-tab="reminders">
+            <i class="ph ph-bell"></i>
+            <span localize="settings.tabs.reminders">Påmindelser</span>
+        </swp-tab>
+        <swp-tab data-tab="payments">
+            <i class="ph ph-credit-card"></i>
+            <span localize="settings.tabs.payments">Betalinger</span>
+        </swp-tab>
+        <swp-tab data-tab="modules">
+            <i class="ph ph-puzzle-piece"></i>
+            <span localize="settings.tabs.modules">Moduler</span>
+        </swp-tab>
+        <swp-tab data-tab="tracking">
+            <i class="ph ph-chart-line-up"></i>
+            <span localize="settings.tabs.tracking">Tracking</span>
+        </swp-tab>
+    </swp-tab-bar>
+</swp-sticky-header>
+
+<!-- Tab Content: Virksomhed -->
+<swp-tab-content data-tab="general" class="active">
+    <swp-page-container>
+        @await Component.InvokeAsync("SettingsGeneral")
+    </swp-page-container>
+</swp-tab-content>
+
+<!-- Tab Content: Kalender -->
+<swp-tab-content data-tab="calendar">
+    <swp-page-container>
+        @await Component.InvokeAsync("SettingsCalendar")
+    </swp-page-container>
+</swp-tab-content>
+
+<!-- Tab Content: Online Booking -->
+<swp-tab-content data-tab="booking">
+    <swp-page-container>
+        @await Component.InvokeAsync("SettingsBooking")
+    </swp-page-container>
+</swp-tab-content>
+
+<!-- Tab Content: Faktura & Kvittering -->
+<swp-tab-content data-tab="billing">
+    <swp-page-container>
+        @await Component.InvokeAsync("SettingsBilling")
+    </swp-page-container>
+</swp-tab-content>
+
+<!-- Tab Content: Påmindelser -->
+<swp-tab-content data-tab="reminders">
+    <swp-page-container>
+        @await Component.InvokeAsync("SettingsReminders")
+    </swp-page-container>
+</swp-tab-content>
+
+<!-- Tab Content: Betalinger -->
+<swp-tab-content data-tab="payments">
+    <swp-page-container>
+        @await Component.InvokeAsync("SettingsPayments")
+    </swp-page-container>
+</swp-tab-content>
+
+<!-- Tab Content: Moduler -->
+<swp-tab-content data-tab="modules">
+    <swp-page-container>
+        @await Component.InvokeAsync("SettingsModules")
+    </swp-page-container>
+</swp-tab-content>
+
+<!-- Tab Content: Tracking -->
+<swp-tab-content data-tab="tracking">
+    <swp-page-container>
+        @await Component.InvokeAsync("SettingsTracking")
+    </swp-page-container>
+</swp-tab-content>

PlanTempus.Application/Features/Settings/Pages/Index.cshtml.cs

@@ -0,0 +1,10 @@
+using Microsoft.AspNetCore.Mvc.RazorPages;
+
+namespace PlanTempus.Application.Features.Settings.Pages;
+
+public class IndexModel : PageModel
+{
+    public void OnGet()
+    {
+    }
+}