Add team, developers, PDF type, and QR rendering dependency.

Enables account collaboration, API tokens, hosted PDF codes, and fixes QR detail 500s by declaring chillerlan/php-qrcode.

Co-authored-by: Cursor <cursoragent@cursor.com>

app/Models/QrDocument.php

@@ -3,9 +3,33 @@
 namespace App\Models;
 
 use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Database\Eloquent\Relations\HasMany;
 
-/** Stub — document/file QRs belong to Ladill Transfer, not QR Plus. */
 class QrDocument extends Model
 {
-    protected $guarded = [];
+    protected $fillable = [
+        'user_id',
+        'title',
+        'disk',
+        'path',
+        'mime_type',
+        'size_bytes',
+        'page_count',
+    ];
+
+    protected $casts = [
+        'size_bytes' => 'integer',
+        'page_count' => 'integer',
+    ];
+
+    public function user(): BelongsTo
+    {
+        return $this->belongsTo(User::class);
+    }
+
+    public function qrCodes(): HasMany
+    {
+        return $this->hasMany(QrCode::class);
+    }
 }