Stand: SMTP-Test, Admin-Mail-Tab, Notifiable-Fix, Lazy-Quill

- Fix: Notifiable-Trait zum User-Model hinzugefuegt (behebt notify()-500er)
- Installer: SMTP-Verbindungstest mit EsmtpTransport + Ueberspringen-Link
- Admin: Neuer E-Mail-Tab mit SMTP-Konfiguration + Verbindungstest
- Admin: Lazy Quill-Initialisierung (nur sichtbare Locale wird geladen)
- Uebersetzungen: 17 neue Mail-Keys in allen 6 Sprachen

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/Providers/AppServiceProvider.php

@@ -0,0 +1,71 @@
+<?php
+
+namespace App\Providers;
+
+use App\Services\GeocodingService;
+use App\Services\HtmlSanitizerService;
+use App\Services\InvitationService;
+use App\Services\SupportApiService;
+use Illuminate\Cache\RateLimiting\Limit;
+use Illuminate\Http\Request;
+use Illuminate\Support\Facades\RateLimiter;
+use Illuminate\Support\ServiceProvider;
+
+class AppServiceProvider extends ServiceProvider
+{
+    public function register(): void
+    {
+        $this->app->singleton(HtmlSanitizerService::class);
+        $this->app->singleton(GeocodingService::class);
+        $this->app->singleton(InvitationService::class);
+        $this->app->singleton(SupportApiService::class);
+
+        // During installation: ensure .env exists, APP_KEY is set,
+        // and session/cache use file driver (database may not exist yet).
+        // This must happen in register() — before middleware and any cache access.
+        if (! file_exists(storage_path('installed'))) {
+            $envPath = base_path('.env');
+
+            if (! file_exists($envPath) && file_exists(base_path('.env.example'))) {
+                copy(base_path('.env.example'), $envPath);
+            }
+
+            if (file_exists($envPath) && empty(config('app.key'))) {
+                $key = 'base64:'.base64_encode(random_bytes(32));
+                $envContent = file_get_contents($envPath);
+                $envContent = preg_replace('/^APP_KEY=.*$/m', 'APP_KEY='.$key, $envContent);
+                file_put_contents($envPath, $envContent);
+                config(['app.key' => $key]);
+            }
+
+            // Session und Cache auf Datei-basiert umschalten.
+            // Die .env hat SESSION_DRIVER=database und CACHE_STORE=database,
+            // aber vor der Installation existiert die Datenbank noch nicht.
+            config([
+                'session.driver' => 'file',
+                'cache.default' => 'file',
+                'session.cookie' => 'handball_installer_session',
+                'session.encrypt' => false, // Verschluesselung braucht stabilen Key; bei Erstinstall unnoetig
+            ]);
+        }
+    }
+
+    public function boot(): void
+    {
+        RateLimiter::for('login', function (Request $request) {
+            return Limit::perMinute(5)->by($request->input('email') . '|' . $request->ip());
+        });
+
+        RateLimiter::for('registration', function (Request $request) {
+            return Limit::perHour(5)->by($request->ip());
+        });
+
+        RateLimiter::for('user-actions', function (Request $request) {
+            return Limit::perMinute(30)->by($request->user()?->id ?: $request->ip());
+        });
+
+        RateLimiter::for('geocoding', function (Request $request) {
+            return Limit::perMinute(30)->by($request->ip());
+        });
+    }
+}