Bill transfer storage monthly with a 15-day grace period before deletion.

Files stay available while wallet renewals succeed each month. Failed renewals
keep files for TRANSFER_GRACE_PERIOD_DAYS (default 15) before automatic cleanup.

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

app/Http/Controllers/Qr/AccountController.php

@@ -52,10 +52,7 @@ class AccountController extends Controller
 
         $activeTransfers = Transfer::query()
             ->where('user_id', $user->id)
-            ->where('status', Transfer::STATUS_ACTIVE)
-            ->where(function ($query) {
-                $query->whereNull('expires_at')->orWhere('expires_at', '>', now());
-            })
+            ->accessible()
             ->orderByDesc('storage_bytes')
             ->get();