Restructures project with feature-based organization

Refactors project structure to support modular, feature-driven development

Introduces comprehensive language localization support
Adds menu management with role-based access control
Implements dynamic sidebar and theme switching capabilities

Enhances project scalability and maintainability

app/wwwroot/ts/app.ts

@@ -0,0 +1,58 @@
+/**
+ * Salon OS App
+ *
+ * Main application class that orchestrates all UI controllers
+ */
+
+import { SidebarController } from './modules/sidebar';
+import { DrawerController } from './modules/drawers';
+import { ThemeController } from './modules/theme';
+import { SearchController } from './modules/search';
+import { LockScreenController } from './modules/lockscreen';
+
+/**
+ * Main application class
+ */
+export class App {
+  readonly sidebar: SidebarController;
+  readonly drawers: DrawerController;
+  readonly theme: ThemeController;
+  readonly search: SearchController;
+  readonly lockScreen: LockScreenController;
+
+  constructor() {
+    // Initialize controllers
+    this.sidebar = new SidebarController();
+    this.drawers = new DrawerController();
+    this.theme = new ThemeController();
+    this.search = new SearchController();
+    this.lockScreen = new LockScreenController(this.drawers);
+  }
+}
+
+/**
+ * Global app instance
+ */
+let app: App;
+
+/**
+ * Initialize the application
+ */
+function init(): void {
+  app = new App();
+
+  // Expose to window for debugging
+  if (typeof window !== 'undefined') {
+    (window as unknown as { app: App }).app = app;
+  }
+}
+
+// Wait for DOM ready
+if (document.readyState === 'loading') {
+  document.addEventListener('DOMContentLoaded', init);
+} else {
+  init();
+}
+
+export { app };
+export default App;