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/public/.htaccess

@@ -0,0 +1,25 @@
+<IfModule mod_rewrite.c>
+    <IfModule mod_negotiation.c>
+        Options -MultiViews -Indexes
+    </IfModule>
+
+    RewriteEngine On
+
+    # Handle Authorization Header
+    RewriteCond %{HTTP:Authorization} .
+    RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization}]
+
+    # Handle X-XSRF-Token Header
+    RewriteCond %{HTTP:x-xsrf-token} .
+    RewriteRule .* - [E=HTTP_X_XSRF_TOKEN:%{HTTP:X-XSRF-Token}]
+
+    # Redirect Trailing Slashes If Not A Folder...
+    RewriteCond %{REQUEST_FILENAME} !-d
+    RewriteCond %{REQUEST_URI} (.+)/$
+    RewriteRule ^ %1 [L,R=301]
+
+    # Send Requests To Front Controller...
+    RewriteCond %{REQUEST_FILENAME} !-d
+    RewriteCond %{REQUEST_FILENAME} !-f
+    RewriteRule ^ index.php [L]
+</IfModule>

backend/public/index.php

@@ -0,0 +1,20 @@
+<?php
+
+use Illuminate\Foundation\Application;
+use Illuminate\Http\Request;
+
+define('LARAVEL_START', microtime(true));
+
+// Determine if the application is in maintenance mode...
+if (file_exists($maintenance = __DIR__.'/../storage/framework/maintenance.php')) {
+    require $maintenance;
+}
+
+// Register the Composer autoloader...
+require __DIR__.'/../vendor/autoload.php';
+
+// Bootstrap Laravel and handle the request...
+/** @var Application $app */
+$app = require_once __DIR__.'/../bootstrap/app.php';
+
+$app->handleRequest(Request::capture());

backend/public/robots.txt

@@ -0,0 +1,2 @@
+User-agent: *
+Disallow: