#53 Run chat panel: surface API errors

[Anonymous]

Originally created by: yaront1111

Context

The Run Chat tab uses useRunChat, but errors from the chat API aren’t surfaced, so users just see an empty state when the API is unreachable/unauthorized.

Task

Show a lightweight error callout in the Chat panel when useRunChat reports an error.

Acceptance criteria

• If useRunChat.isError is true, render a small inline error message in ChatPanel.
• Prefer specific copy for 401/403 (API key/permission) and 404 (endpoint not available).
• Keep the layout compact and consistent with existing UI styles.