Agents window with CLI will auto dismiss quota limit reached message

[amunger]

2026-05-18_10-29-26.mp4

Testing microsoft/vscode-internalbacklog#7701

1. send a message to the CLI with an already exausted quota.
2. wait for several seconds

🐛 The UI looks like I never sent a message

[pwang347]

This seems related to general error handling in Agents window CC @sandy081

[bishop335]

Testing microsoft/vscode-internalbacklog#7701

send a message to the CLI with an already exausted quota.
wait for several seconds
🐛 The UI looks like I never sent a message