fix(workspace): normalize websocket headers for reverse proxies and show detailed disconnect reason

frontend/src/lib/api.ts

@@ -1118,8 +1118,9 @@ export function connectWebSocket(): void {
       }
     };
 
-    ws.onclose = () => {
+    ws.onclose = (evt: CloseEvent) => {
       activeGlobalWS = null;
+      console.warn('[MindSift Global WS] Closed with code:', evt?.code, 'reason:', evt?.reason);
       notifyStatusChange(false);
       if (!manualDisconnect && getToken()) {
         clearTimeout(wsReconnectTimer);
@@ -1131,7 +1132,8 @@ export function connectWebSocket(): void {
       }
     };
 
-    ws.onerror = () => {
+    ws.onerror = (e) => {
+      console.warn('[MindSift Global WS] Error:', e);
       notifyStatusChange(false);
       try {
         ws.close();