Split API and frontend, migrate SQLite to PostgreSQL

- api.fahrschultermin.de: full API entry point with CORS + session auth
- fahrschultermin.de: frontend only, no more /api/v1 routing
- Database.php: PostgreSQL support (pgsql driver + lastval())
- All repositories: use Database::lastInsertId() for PG compatibility
- config/app.php: PostgreSQL connection settings + CORS config
- bootstrap.php: pass full $config to Database::configure()
- public/index.php: fetch-patch to redirect /api/v1 to api.fahrschultermin.de
- database/schema_pgsql.sql: full PostgreSQL schema (BIGSERIAL)
- database/import_pgsql.sql: 518 rows migrated from SQLite

www/fahrschultermin.de/public/.htaccess

@@ -1,4 +1,9 @@
 RewriteEngine On
+
+# Proxy API requests to api.fahrschultermin.de
+RewriteRule ^api/v1/(.*)$ https://api.fahrschultermin.de/api/v1/$1 [P,L]
+
+# Serve static assets directly
 RewriteCond %{REQUEST_FILENAME} !-f
 RewriteCond %{REQUEST_FILENAME} !-d
-RewriteRule ^ index.php [QSA,L]
+RewriteRule ^ index.php [QSA,L]

www/fahrschultermin.de/public/index.php

@@ -1,74 +1,12 @@
 <?php
 
-declare(strict_types=1);
+/**
+ * fahrschultermin.de — Frontend entry point
+ * Patches fetch() to proxy /api/v1/* calls to api.fahrschultermin.de
+ * so the JS bundle (with hardcoded /api/v1 paths) just works.
+ */
 
-$bootstrap = require __DIR__ . '/../app/bootstrap.php';
-
-use App\Http\Controllers\AppointmentsController;
-use App\Http\Controllers\AuthController;
-use App\Http\Controllers\BootstrapController;
-use App\Http\Controllers\InstructorsController;
-use App\Http\Controllers\ReferenceDataController;
-use App\Http\Controllers\StudentsController;
-use App\Http\Controllers\TenantsController;
-use App\Http\Controllers\UsersController;
-
-$router = $bootstrap['router'];
-$request = new App\Support\Request();
-$path = $request->path();
-
-if ($request->method() === 'OPTIONS') {
-    http_response_code(204);
-    exit;
-}
-
-if (str_starts_with($path, '/api/v1')) {
-    $auth = new AuthController();
-    $bootstrapController = new BootstrapController();
-    $students = new StudentsController();
-    $references = new ReferenceDataController();
-    $appointments = new AppointmentsController();
-    $users = new UsersController();
-    $tenants = new TenantsController();
-    $instructors = new InstructorsController();
-
-    $router->post('/api/v1/auth/login', [$auth, 'login']);
-    $router->post('/api/v1/auth/logout', [$auth, 'logout']);
-    $router->get('/api/v1/auth/me', [$auth, 'me']);
-    $router->get('/api/v1/bootstrap', $bootstrapController);
-    $router->get('/api/v1/students', [$students, 'index']);
-    $router->post('/api/v1/students', [$students, 'store']);
-    $router->patch('/api/v1/students/{id}/training', [$students, 'updateTraining']);
-    $router->patch('/api/v1/students/{id}', [$students, 'update']);
-    $router->delete('/api/v1/students/{id}', [$students, 'destroy']);
-    $router->get('/api/v1/lesson-types', [$references, 'lessonTypes']);
-    $router->post('/api/v1/lesson-types', [$references, 'storeLessonType']);
-    $router->post('/api/v1/lesson-types/reorder', [$references, 'reorderLessonTypes']);
-    $router->patch('/api/v1/lesson-types/{id}', [$references, 'updateLessonType']);
-    $router->delete('/api/v1/lesson-types/{id}', [$references, 'destroyLessonType']);
-    $router->post('/api/v1/lesson-types/visibility', [$references, 'updateLessonTypeMatrix']);
-    $router->get('/api/v1/license-class-templates', [$references, 'templates']);
-    $router->post('/api/v1/license-class-templates', [$references, 'storeTemplate']);
-    $router->patch('/api/v1/license-class-templates/{id}', [$references, 'updateTemplate']);
-    $router->get('/api/v1/instructors', [$instructors, 'index']);
-    $router->post('/api/v1/instructors', [$instructors, 'store']);
-    $router->patch('/api/v1/instructors/{id}', [$instructors, 'update']);
-    $router->get('/api/v1/users', [$users, 'index']);
-    $router->post('/api/v1/users', [$users, 'store']);
-    $router->patch('/api/v1/users/{id}', [$users, 'update']);
-    $router->get('/api/v1/tenants', [$tenants, 'index']);
-    $router->post('/api/v1/tenants', [$tenants, 'store']);
-    $router->patch('/api/v1/tenants/{id}', [$tenants, 'update']);
-    $router->patch('/api/v1/tenant/profile', [$tenants, 'updateOwn']);
-    $router->get('/api/v1/appointments', [$appointments, 'index']);
-    $router->post('/api/v1/appointments/validate', [$appointments, 'validate']);
-    $router->post('/api/v1/appointments', [$appointments, 'store']);
-    $router->patch('/api/v1/appointments/{id}', [$appointments, 'update']);
-    $router->delete('/api/v1/appointments/{id}', [$appointments, 'destroy']);
-
-    $router->dispatch();
-    exit;
-}
+const API_BASE = 'https://api.fahrschultermin.de';
 
 $assetManifestPath = __DIR__ . '/assets/.vite/manifest.json';
 $mainAsset = '/assets/index.js';
@@ -95,6 +33,21 @@ if (is_file($assetManifestPath)) {
 </head>
 <body>
     <div id="root"></div>
+    <script>
+        // Patch fetch to redirect /api/v1/* → api.fahrschultermin.de/api/v1/*
+        window.__API_BASE__ = '<?= API_BASE ?>';
+        const _fetch = window.fetch.bind(window);
+        window.fetch = function (resource, options = {}) {
+            let url = typeof resource === 'string' ? resource : resource.url;
+            if (typeof url === 'string' && url.startsWith('/api/v1')) {
+                url = '<?= API_BASE ?>' + url;
+                const req = new Request(url, options);
+                req.credentials = 'include';
+                return _fetch(req);
+            }
+            return _fetch(resource, options);
+        };
+    </script>
     <script type="module" src="<?= htmlspecialchars($mainAsset, ENT_QUOTES) ?>"></script>
 </body>
-</html>
+</html>