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/nodes/svg-pattern-element/SVGPatternElement.d.ts

@@ -0,0 +1,70 @@
+import SVGAnimatedString from '../../svg/SVGAnimatedString.js';
+import SVGElement from '../svg-element/SVGElement.js';
+import SVGAnimatedEnumeration from '../../svg/SVGAnimatedEnumeration.js';
+import * as PropertySymbol from '../../PropertySymbol.js';
+import SVGAnimatedTransformList from '../../svg/SVGAnimatedTransformList.js';
+import SVGAnimatedLength from '../../svg/SVGAnimatedLength.js';
+/**
+ * SVG Pattern Element.
+ *
+ * @see https://developer.mozilla.org/en-US/docs/Web/API/SVGPatternElement
+ */
+export default class SVGPatternElement extends SVGElement {
+    [PropertySymbol.href]: SVGAnimatedString | null;
+    [PropertySymbol.patternUnits]: SVGAnimatedEnumeration | null;
+    [PropertySymbol.patternContentUnits]: SVGAnimatedEnumeration | null;
+    [PropertySymbol.patternTransform]: SVGAnimatedTransformList | null;
+    [PropertySymbol.x]: SVGAnimatedLength | null;
+    [PropertySymbol.y]: SVGAnimatedLength | null;
+    [PropertySymbol.width]: SVGAnimatedLength | null;
+    [PropertySymbol.height]: SVGAnimatedLength | null;
+    /**
+     * Returns href.
+     *
+     * @returns Href.
+     */
+    get href(): SVGAnimatedString;
+    /**
+     * Returns pattern units.
+     *
+     * @returns Pattern units.
+     */
+    get patternUnits(): SVGAnimatedEnumeration;
+    /**
+     * Returns pattern content units.
+     *
+     * @returns Pattern content units.
+     */
+    get patternContentUnits(): SVGAnimatedEnumeration;
+    /**
+     * Returns pattern transform.
+     *
+     * @returns Pattern transform.
+     */
+    get patternTransform(): SVGAnimatedTransformList;
+    /**
+     * Returns width.
+     *
+     * @returns Width.
+     */
+    get width(): SVGAnimatedLength;
+    /**
+     * Returns height.
+     *
+     * @returns Height.
+     */
+    get height(): SVGAnimatedLength;
+    /**
+     * Returns x position.
+     *
+     * @returns X position.
+     */
+    get x(): SVGAnimatedLength;
+    /**
+     * Returns y position.
+     *
+     * @returns Y position.
+     */
+    get y(): SVGAnimatedLength;
+}
+//# sourceMappingURL=SVGPatternElement.d.ts.map