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/zod-v3-to-json-schema/dist/cjs/getRelativePath.js

@@ -0,0 +1,12 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.getRelativePath = void 0;
+const getRelativePath = (pathA, pathB) => {
+    let i = 0;
+    for (; i < pathA.length && i < pathB.length; i++) {
+        if (pathA[i] !== pathB[i])
+            break;
+    }
+    return [(pathA.length - i).toString(), ...pathB.slice(i)].join("/");
+};
+exports.getRelativePath = getRelativePath;