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/lib/resize-observer/ResizeObserver.d.ts

@@ -0,0 +1,26 @@
+/**
+ * The ResizeObserver interface reports changes to the dimensions of an Element's content or border box, or the bounding box of an SVGElement.
+ *
+ * @see https://developer.mozilla.org/en-US/docs/Web/API/ResizeObserver
+ */
+export default class ResizeObserver {
+    /**
+     * Starts observing.
+     *
+     * Not implemented.
+     */
+    observe(): void;
+    /**
+     * Stops observing.
+     *
+     * Not implemented.
+     */
+    unobserve(): void;
+    /**
+     * Disconnects.
+     *
+     * Not implemented.
+     */
+    disconnect(): void;
+}
+//# sourceMappingURL=ResizeObserver.d.ts.map

frontend/node_modules/happy-dom/lib/resize-observer/ResizeObserver.d.ts.map

@@ -0,0 +1 @@
+{"version":3,"file":"ResizeObserver.d.ts","sourceRoot":"","sources":["../../src/resize-observer/ResizeObserver.ts"],"names":[],"mappings":"AAAA;;;;GAIG;AACH,MAAM,CAAC,OAAO,OAAO,cAAc;IAClC;;;;OAIG;IACI,OAAO,IAAI,IAAI;IAItB;;;;OAIG;IACI,SAAS,IAAI,IAAI;IAIxB;;;;OAIG;IACI,UAAU,IAAI,IAAI;CAGzB"}

frontend/node_modules/happy-dom/lib/resize-observer/ResizeObserver.js

@@ -0,0 +1,32 @@
+/**
+ * The ResizeObserver interface reports changes to the dimensions of an Element's content or border box, or the bounding box of an SVGElement.
+ *
+ * @see https://developer.mozilla.org/en-US/docs/Web/API/ResizeObserver
+ */
+export default class ResizeObserver {
+    /**
+     * Starts observing.
+     *
+     * Not implemented.
+     */
+    observe() {
+        // TODO: Not implemented
+    }
+    /**
+     * Stops observing.
+     *
+     * Not implemented.
+     */
+    unobserve() {
+        // TODO: Not implemented
+    }
+    /**
+     * Disconnects.
+     *
+     * Not implemented.
+     */
+    disconnect() {
+        // TODO: Not implemented
+    }
+}
+//# sourceMappingURL=ResizeObserver.js.map

frontend/node_modules/happy-dom/lib/resize-observer/ResizeObserver.js.map

@@ -0,0 +1 @@
+{"version":3,"file":"ResizeObserver.js","sourceRoot":"","sources":["../../src/resize-observer/ResizeObserver.ts"],"names":[],"mappings":"AAAA;;;;GAIG;AACH,MAAM,CAAC,OAAO,OAAO,cAAc;IAClC;;;;OAIG;IACI,OAAO;QACb,wBAAwB;IACzB,CAAC;IAED;;;;OAIG;IACI,SAAS;QACf,wBAAwB;IACzB,CAAC;IAED;;;;OAIG;IACI,UAAU;QAChB,wBAAwB;IACzB,CAAC;CACD"}