Eric Traut a526f54b00 Show live context compaction status in the TUI (#42319) ...

## Why

Context compaction was only reported after it completed, so the TUI did not
show when compaction was actively making room to continue.

## What changed

- Show `Compacting context` as soon as manual or server-driven compaction
  starts, with an elapsed timer independent of the current turn timer.
- Preserve the compaction status across follow-up input and transient activity,
  while still allowing retry errors to take precedence.
- Restore in-progress compaction timing from thread snapshots and add the live
  duration to the completion message.
- Clear stale compaction state when the turn starts, completes, or terminates.

## Testing

Added TUI tests covering manual and server-driven compaction, narrow rendering,
follow-up input, replay and task switching, retry status, timer preservation,
and turn termination.

GitOrigin-RevId: 804e1bc553315da24ff1f99462e8e282818cada3

2026-09-02 18:03:55 +00:00

..

timer_tests.rs

…

timer.rs

Show live context compaction status in the TUI (#42319)

2026-09-02 18:03:55 +00:00