Add NAS file manager integration and all pending platform changes

- Installed p7h/nas-file-manager package via private VCS repo
- Published config/nas-file-manager.php with super_admin middleware restriction
- Added NAS env vars to .env.example
- Created admin/nas-storage page with connection info panel and file browser widget
- Added NAS Storage link to admin sidebar (super_admin only)
- Added SuperAdminController@nasStorage method and admin.nas-storage route
- Includes all accumulated branch changes: profile wall, 2FA, audit logs,
  settings panel, country/phone/timezone components, posts, slideshow,
  playlist shares, video downloads/shares, comment likes, notifications,
  social links, and more

Co-Authored-By: Claude Sonnet 4.6 <[email protected]>

app/Exceptions/Handler.php

@@ -3,28 +3,32 @@
 namespace App\Exceptions;
 
 use Illuminate\Foundation\Exceptions\Handler as ExceptionHandler;
+use Illuminate\Database\Eloquent\ModelNotFoundException;
+use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
 use Throwable;
 
 class Handler extends ExceptionHandler
 {
-    /**
-     * The list of the inputs that are never flashed to the session on validation exceptions.
-     *
-     * @var array<int, string>
-     */
     protected $dontFlash = [
         'current_password',
         'password',
         'password_confirmation',
     ];
 
-    /**
-     * Register the exception handling callbacks for the application.
-     */
     public function register(): void
     {
         $this->reportable(function (Throwable $e) {
             //
         });
+
+        // Redirect to home with a toast when a video URL can't be resolved
+        $this->renderable(function (NotFoundHttpException $e, $request) {
+            $prev = $e->getPrevious();
+            $isVideoRoute = str_starts_with($request->path(), 'videos/');
+
+            if ($isVideoRoute && ($prev instanceof ModelNotFoundException || $e->getMessage() === '')) {
+                return redirect('/')->with('toast_error', 'This video is no longer available.');
+            }
+        });
     }
 }