Adds Kasse (Cash Register) module and related components

Introduces comprehensive cash management functionality with multiple view components for tracking daily transactions, filtering, and reconciliation

Implements:
- Cash calculation and difference tracking
- Dynamic tab switching
- Checkbox selection and row expansion
- Date filtering and approval mechanisms

PlanTempus.Application/wwwroot/ts/app.ts

@@ -9,6 +9,7 @@ import { DrawerController } from './modules/drawers';
 import { ThemeController } from './modules/theme';
 import { SearchController } from './modules/search';
 import { LockScreenController } from './modules/lockscreen';
+import { KasseController } from './modules/kasse';
 
 /**
  * Main application class
@@ -19,6 +20,7 @@ export class App {
   readonly theme: ThemeController;
   readonly search: SearchController;
   readonly lockScreen: LockScreenController;
+  readonly kasse: KasseController;
 
   constructor() {
     // Initialize controllers
@@ -27,6 +29,7 @@ export class App {
     this.theme = new ThemeController();
     this.search = new SearchController();
     this.lockScreen = new LockScreenController(this.drawers);
+    this.kasse = new KasseController();
   }
 }