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/svg-defs-element/SVGDefsElement.cjs

@@ -0,0 +1,15 @@
+"use strict";
+var __importDefault = (this && this.__importDefault) || function (mod) {
+    return (mod && mod.__esModule) ? mod : { "default": mod };
+};
+Object.defineProperty(exports, "__esModule", { value: true });
+const SVGGraphicsElement_js_1 = __importDefault(require("../svg-graphics-element/SVGGraphicsElement.cjs"));
+/**
+ * SVG Defs Element.
+ *
+ * @see https://developer.mozilla.org/en-US/docs/Web/API/SVGDefsElement
+ */
+class SVGDefsElement extends SVGGraphicsElement_js_1.default {
+}
+exports.default = SVGDefsElement;
+//# sourceMappingURL=SVGDefsElement.cjs.map