Fix bootstrap IDs missing on reuse and pathname-driven effect re-subscription

- wsServer.ts: Assign welcomeBootstrapProjectId/ThreadId in the else
  branch when an existing thread is found, so the welcome payload always
  includes bootstrap IDs when autoBootstrapProjectFromCwd is enabled.

- __root.tsx: Move pathname into a ref so route changes don't tear down
  and re-create WebSocket subscriptions, preventing latestSequence reset
  and redundant snapshot syncs on every navigation.

Author: cursoragent

apps/server/src/wsServer.ts

@@ -387,6 +387,9 @@ export const createServer = Effect.fn(function* (): Effect.fn.Return<
       });
       welcomeBootstrapProjectId = bootstrapProjectId;
       welcomeBootstrapThreadId = threadId;
+    } else {
+      welcomeBootstrapProjectId = bootstrapProjectId;
+      welcomeBootstrapThreadId = existingThread.id;
     }
   }
 

apps/web/src/routes/__root.tsx

@@ -125,6 +125,8 @@ function EventRouter() {
   const queryClient = useQueryClient();
   const navigate = useNavigate();
   const pathname = useRouterState({ select: (state) => state.location.pathname });
+  const pathnameRef = useRef(pathname);
+  pathnameRef.current = pathname;
   const lastConfigIssuesSignatureRef = useRef<string | null>(null);
   const handledBootstrapThreadIdRef = useRef<string | null>(null);
 
@@ -187,7 +189,7 @@ function EventRouter() {
           projectId: payload.bootstrapProjectId,
           expanded: true,
         });
-        if (pathname !== "/") {
+        if (pathnameRef.current !== "/") {
           return;
         }
         if (handledBootstrapThreadIdRef.current === payload.bootstrapThreadId) {
@@ -249,7 +251,7 @@ function EventRouter() {
       unsubWelcome();
       unsubServerConfigUpdated();
     };
-  }, [dispatch, navigate, pathname, queryClient]);
+  }, [dispatch, navigate, queryClient]);
 
   return null;
 }