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/cookie/urilities/CookieExpireUtility.cjs

@@ -0,0 +1,18 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+/**
+ * Cookie expire utility.
+ */
+class CookieExpireUtility {
+    /**
+     * Returns "true" if cookie has expired.
+     *
+     * @param cookie Cookie.
+     * @returns "true" if cookie has expired.
+     */
+    static hasExpired(cookie) {
+        return cookie.expires && cookie.expires.getTime() < Date.now();
+    }
+}
+exports.default = CookieExpireUtility;
+//# sourceMappingURL=CookieExpireUtility.cjs.map