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/Http/Controllers/Admin/DashboardController.php

@@ -0,0 +1,81 @@
+<?php
+
+namespace App\Http\Controllers\Admin;
+
+use App\Http\Controllers\Controller;
+use App\Enums\EventStatus;
+use App\Enums\ParticipantStatus;
+use App\Enums\UserRole;
+use App\Models\ActivityLog;
+use App\Models\Event;
+use App\Models\Invitation;
+use App\Models\Player;
+use App\Models\User;
+use App\Services\SupportApiService;
+use Illuminate\Support\Facades\Cache;
+use Illuminate\View\View;
+
+class DashboardController extends Controller
+{
+    public function index(): View
+    {
+        $stats = [
+            'users' => User::count(),
+            'players' => Player::count(),
+            'upcoming_events' => Event::where('status', EventStatus::Published)
+                ->where('start_at', '>=', now())->count(),
+            'open_invitations' => Invitation::whereNull('accepted_at')
+                ->where('expires_at', '>', now())->count(),
+        ];
+
+        // Events mit vielen offenen Rückmeldungen
+        $eventsWithOpenResponses = Event::with('team')
+            ->where('status', EventStatus::Published)
+            ->where('start_at', '>=', now())
+            ->withCount(['participants as open_count' => function ($q) {
+                $q->where('status', ParticipantStatus::Unknown);
+            }])
+            ->orderByDesc('open_count')
+            ->limit(10)
+            ->get()
+            ->filter(fn ($e) => $e->open_count > 0)
+            ->take(5);
+
+        // DSGVO: User mit hochgeladenem Dokument, aber ohne Admin-Bestätigung
+        $pendingDsgvoUsers = User::where('role', UserRole::User)
+            ->whereNotNull('dsgvo_consent_file')
+            ->whereNull('dsgvo_accepted_at')
+            ->orderBy('name')
+            ->get();
+
+        // Letzte 10 DSGVO-Ereignisse
+        $dsgvoEvents = ActivityLog::with('user')
+            ->whereIn('action', [
+                'dsgvo_consent_uploaded',
+                'dsgvo_consent_confirmed',
+                'dsgvo_consent_revoked',
+                'dsgvo_consent_removed',
+                'dsgvo_consent_rejected',
+                'account_self_deleted',
+                'child_auto_deactivated',
+            ])
+            ->latest('created_at')
+            ->limit(10)
+            ->get();
+
+        // Update-Check (cached 24h, nur wenn registriert)
+        $supportService = app(SupportApiService::class);
+        if ($supportService->isRegistered()) {
+            $supportService->checkForUpdate();
+        }
+        $hasUpdate = $supportService->hasUpdate();
+        $updateVersion = $hasUpdate
+            ? (Cache::get('support.update_check')['latest_version'] ?? null)
+            : null;
+
+        return view('admin.dashboard', compact(
+            'stats', 'eventsWithOpenResponses', 'pendingDsgvoUsers', 'dsgvoEvents',
+            'hasUpdate', 'updateVersion'
+        ));
+    }
+}