fix(cli): do not override GOOGLE_CLOUD_PROJECT in Cloud Shell when using Vertex AI (#24455)

Co-authored-by: David Pierce <davidapierce@google.com>

packages/cli/src/ui/components/DialogManager.tsx

@@ -39,6 +39,7 @@ import { IdeTrustChangeDialog } from './IdeTrustChangeDialog.js';
 import { NewAgentsNotification } from './NewAgentsNotification.js';
 import { AgentConfigDialog } from './AgentConfigDialog.js';
 import { PolicyUpdateDialog } from './PolicyUpdateDialog.js';
+import { LoginRestartDialog } from '../auth/LoginRestartDialog.js';
 
 interface DialogManagerProps {
   addItem: UseHistoryManagerReturn['addItem'];
@@ -306,6 +307,17 @@ export const DialogManager = ({
     );
   }
 
+  if (uiState.isAwaitingLoginRestart) {
+    return (
+      <Box flexDirection="column">
+        <LoginRestartDialog
+          onDismiss={uiActions.dismissLoginRestart}
+          config={config}
+          message={uiState.loginRestartMessage}
+        />
+      </Box>
+    );
+  }
   if (uiState.isAuthDialogOpen) {
     return (
       <Box flexDirection="column">