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/nodes/html-unknown-element/HTMLUnknownElement.cjs

@@ -0,0 +1,16 @@
+"use strict";
+var __importDefault = (this && this.__importDefault) || function (mod) {
+    return (mod && mod.__esModule) ? mod : { "default": mod };
+};
+Object.defineProperty(exports, "__esModule", { value: true });
+const HTMLElement_js_1 = __importDefault(require("../html-element/HTMLElement.cjs"));
+/**
+ * HTML Unknown Element.
+ *
+ * Reference:
+ * https://developer.mozilla.org/en-US/docs/Web/API/HTMLUnknownElement.
+ */
+class HTMLUnknownElement extends HTMLElement_js_1.default {
+}
+exports.default = HTMLUnknownElement;
+//# sourceMappingURL=HTMLUnknownElement.cjs.map

frontend/node_modules/happy-dom/cjs/nodes/html-unknown-element/HTMLUnknownElement.cjs.map

@@ -0,0 +1 @@
+{"version":3,"file":"HTMLUnknownElement.cjs","sourceRoot":"","sources":["../../../src/nodes/html-unknown-element/HTMLUnknownElement.ts"],"names":[],"mappings":";;;;;AAAA,oFAAyD;AAEzD;;;;;GAKG;AACH,MAAqB,kBAAmB,SAAQ,wBAAW;CAAG;AAA9D,qCAA8D"}

frontend/node_modules/happy-dom/cjs/nodes/html-unknown-element/HTMLUnknownElement.d.ts

@@ -0,0 +1,10 @@
+import HTMLElement from '../html-element/HTMLElement.cjs';
+/**
+ * HTML Unknown Element.
+ *
+ * Reference:
+ * https://developer.mozilla.org/en-US/docs/Web/API/HTMLUnknownElement.
+ */
+export default class HTMLUnknownElement extends HTMLElement {
+}
+//# sourceMappingURL=HTMLUnknownElement.d.ts.map

frontend/node_modules/happy-dom/cjs/nodes/html-unknown-element/HTMLUnknownElement.d.ts.map

@@ -0,0 +1 @@
+{"version":3,"file":"HTMLUnknownElement.d.ts","sourceRoot":"","sources":["../../../src/nodes/html-unknown-element/HTMLUnknownElement.ts"],"names":[],"mappings":"AAAA,OAAO,WAAW,MAAM,gCAAgC,CAAC;AAEzD;;;;;GAKG;AACH,MAAM,CAAC,OAAO,OAAO,kBAAmB,SAAQ,WAAW;CAAG"}