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/eslint-plugin-svelte/lib/processor/index.d.ts

@@ -0,0 +1,7 @@
+import type { Linter } from 'eslint';
+export * as meta from '../meta.js';
+/** preprocess */
+export declare function preprocess(code: string, filename: string): string[];
+/** postprocess */
+export declare function postprocess([messages]: Linter.LintMessage[][], filename: string): Linter.LintMessage[];
+export declare const supportsAutofix = true;

frontend/node_modules/eslint-plugin-svelte/lib/processor/index.js

@@ -0,0 +1,29 @@
+import { beginShared, terminateShared } from '../shared/index.js';
+export * as meta from '../meta.js';
+/** preprocess */
+export function preprocess(code, filename) {
+    if (filename) {
+        beginShared(filename);
+    }
+    return [code];
+}
+/** postprocess */
+export function postprocess([messages], filename) {
+    const shared = terminateShared(filename);
+    if (shared) {
+        return filter(messages, shared);
+    }
+    return messages;
+}
+export const supportsAutofix = true;
+/** Filter  */
+function filter(messages, shared) {
+    if (shared.commentDirectives.length === 0) {
+        return messages;
+    }
+    let filteredMessages = messages;
+    for (const cd of shared.commentDirectives) {
+        filteredMessages = cd.filterMessages(filteredMessages);
+    }
+    return filteredMessages;
+}