Add client open mode preference (same tab / new window) to user settings

app/Http/Controllers/User/PreferencesController.php

@@ -31,6 +31,7 @@ class PreferencesController extends Controller
             'friend_requests' => 'sometimes|boolean',
             'room_invites' => 'sometimes|boolean',
             'email_notifications' => 'sometimes|boolean',
+            'client_open_mode' => 'sometimes|in:same,new_window',
         ]);
 
         $preferences = array_merge($this->getDefaultPreferences(), $validated);
@@ -49,6 +50,7 @@ class PreferencesController extends Controller
             'friend_requests' => true,
             'room_invites' => true,
             'email_notifications' => false,
+            'client_open_mode' => 'same',
         ];
     }
 }