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/Models/File.php

@@ -0,0 +1,115 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Database\Eloquent\Relations\BelongsToMany;
+use Illuminate\Support\Facades\Storage;
+
+class File extends Model
+{
+    protected $fillable = [
+        'file_category_id',
+        'original_name',
+        'mime_type',
+        'size',
+    ];
+
+    protected function casts(): array
+    {
+        return [
+            'size' => 'integer',
+        ];
+    }
+
+    public function category(): BelongsTo
+    {
+        return $this->belongsTo(FileCategory::class, 'file_category_id');
+    }
+
+    public function uploader(): BelongsTo
+    {
+        return $this->belongsTo(User::class, 'uploaded_by')->withTrashed();
+    }
+
+    public function events(): BelongsToMany
+    {
+        return $this->belongsToMany(Event::class, 'event_file')->withPivot('created_at');
+    }
+
+    public function teams(): BelongsToMany
+    {
+        return $this->belongsToMany(Team::class, 'team_file')->withPivot('created_at');
+    }
+
+    public function getStoragePath(): string
+    {
+        return 'files/' . $this->stored_name;
+    }
+
+    public function isImage(): bool
+    {
+        return str_starts_with($this->mime_type, 'image/');
+    }
+
+    public function isPdf(): bool
+    {
+        return $this->mime_type === 'application/pdf';
+    }
+
+    public function isHtml(): bool
+    {
+        return $this->mime_type === 'text/html';
+    }
+
+    public function humanSize(): string
+    {
+        $bytes = $this->size;
+        if ($bytes >= 1048576) {
+            return round($bytes / 1048576, 1) . ' MB';
+        }
+        return round($bytes / 1024) . ' KB';
+    }
+
+    public function iconType(): string
+    {
+        return match (true) {
+            str_contains($this->mime_type, 'pdf') => 'pdf',
+            str_contains($this->mime_type, 'wordprocessingml') => 'word',
+            str_contains($this->mime_type, 'spreadsheetml') => 'excel',
+            $this->isImage() => 'image',
+            $this->isHtml() => 'html',
+            default => 'file',
+        };
+    }
+
+    public function extension(): string
+    {
+        return pathinfo($this->original_name, PATHINFO_EXTENSION);
+    }
+
+    public function previewData(): array
+    {
+        $hasPreview = $this->isImage() || $this->isPdf();
+
+        return [
+            'name' => $this->original_name,
+            'category' => $this->category->name ?? '',
+            'size' => $this->humanSize(),
+            'downloadUrl' => route('files.download', $this),
+            'previewUrl' => $hasPreview ? route('files.preview', $this) : null,
+            'isImage' => $this->isImage(),
+            'isPdf' => $this->isPdf(),
+            'isHtml' => $this->isHtml(),
+            'iconBg' => match ($this->iconType()) {
+                'pdf' => 'bg-red-100 text-red-600',
+                'word' => 'bg-blue-100 text-blue-600',
+                'excel' => 'bg-green-100 text-green-600',
+                'image' => 'bg-purple-100 text-purple-600',
+                'html' => 'bg-orange-100 text-orange-600',
+                default => 'bg-gray-100 text-gray-600',
+            },
+        ];
+    }
+}