## Why
Saving a manual thread name leaves pending title generation running and its progress indicator visible until the request finishes.
## What changed
- Cancel pending title requests after a successful manual rename, including renames from the agents overview, and clear the progress indicator immediately.
- Interrupt canceled title-generation turns and unsubscribe their temporary threads. Ignore late start and completion events so canceled requests cannot affect newer requests.
- Cancel pending title requests when resetting connection state.
- Show only a spinner when generating a title without an existing name, removing the `renaming...` placeholder.
## Testing
Add regression tests for manual and overview renames that verify turn interruption, cleanup, and preservation of the saved name. Cover late events after cancellation and update footer and terminal-title snapshots for the spinner-only display.
GitOrigin-RevId: f9490ea7be9968ea6c35d80bfbac06fee57d0135
Felipe Coury
b4c864dd64