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/fetch/utilities/SyncFetchScriptBuilder.d.ts

@@ -0,0 +1,27 @@
+import { Buffer } from 'buffer';
+/**
+ * Synchronous fetch script builder.
+ */
+export default class SyncFetchScriptBuilder {
+    /**
+     * Sends a synchronous request.
+     *
+     * @param request Request.
+     * @param request.url
+     * @param request.method
+     * @param request.headers
+     * @param request.body
+     * @param request.disableStrictSSL
+     * @returns Script.
+     */
+    static getScript(request: {
+        url: URL;
+        method: string;
+        headers: {
+            [name: string]: string;
+        };
+        disableStrictSSL?: boolean;
+        body?: Buffer | null;
+    }): string;
+}
+//# sourceMappingURL=SyncFetchScriptBuilder.d.ts.map