fix(linux): guard WebSocket.prototype assignment — read-only on WebKitGTK

web/src/main.tsx

@@ -79,7 +79,8 @@ if (isTauri) {
     
     return ws;
   } as unknown as typeof WebSocket;
-  window.WebSocket.prototype = OriginalWebSocket.prototype;
+  // ponytail: WebKitGTK may have read-only prototype — guard against throw
+  try { window.WebSocket.prototype = OriginalWebSocket.prototype; } catch { /* readonly, fine */ }
 }
 
 createRoot(document.getElementById('root')!).render(