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

backend/routes/api.php

@@ -0,0 +1,31 @@
+<?php
+
+use App\Http\Controllers\Api\AuthController;
+use App\Http\Middleware\JwtAuth;
+use Illuminate\Support\Facades\Route;
+
+/*
+|--------------------------------------------------------------------------
+| API Routes
+|--------------------------------------------------------------------------
+|
+| These routes are loaded by the RouteServiceProvider within a group which
+| is assigned the "api" middleware group.
+|
+*/
+
+Route::post('/auth/login', [AuthController::class, 'login']);
+Route::post('/auth/refresh', [AuthController::class, 'refresh']);
+
+Route::middleware(JwtAuth::class)->group(function () {
+    Route::post('/auth/logout', [AuthController::class, 'logout']);
+
+    Route::get('/user', function (\Illuminate\Http\Request $request) {
+        return response()->json([
+            'id' => $request->user()->id,
+            'name' => $request->user()->name,
+            'email' => $request->user()->email,
+            'role' => $request->user()->role,
+        ]);
+    });
+});