feat: Reinitialize frontend with SvelteKit and TypeScript

- Delete old Vite+Svelte frontend
- Initialize new SvelteKit project with TypeScript
- Configure Tailwind CSS v4 + DaisyUI
- Implement JWT authentication with auto-refresh
- Create login page with form validation (Zod)
- Add protected route guards
- Update Docker configuration for single-stage build
- Add E2E tests with Playwright (6/11 passing)
- Fix Svelte 5 reactivity with $state() runes

Known issues:
- 5 E2E tests failing (timing/async issues)
- Token refresh implementation needs debugging
- Validation error display timing

frontend/node_modules/happy-dom/cjs/event/events/PointerEvent.d.ts

@@ -0,0 +1,31 @@
+import MouseEvent from './MouseEvent.cjs';
+import IPointerEventInit from './IPointerEventInit.cjs';
+/**
+ *
+ */
+export default class PointerEvent extends MouseEvent {
+    readonly pointerId: number;
+    readonly width: number;
+    readonly height: number;
+    readonly pressure: number;
+    readonly tangentialPressure: number;
+    readonly tiltX: number;
+    readonly tiltY: number;
+    readonly twist: number;
+    readonly altitudeAngle: number;
+    readonly azimuthAngle: number;
+    readonly pointerType: string;
+    readonly isPrimary: boolean;
+    readonly coalescedEvents: PointerEvent[];
+    readonly predictedEvents: PointerEvent[];
+    /**
+     * Constructor.
+     *
+     * @param type Event type.
+     * @param [eventInit] Event init.
+     */
+    constructor(type: string, eventInit?: IPointerEventInit | null);
+    getCoalescedEvents: () => PointerEvent[];
+    getPredictedEvents: () => PointerEvent[];
+}
+//# sourceMappingURL=PointerEvent.d.ts.map