## What changed
Connect the existing composer suggestion UI to generation when `tui.prompt_suggestions` is enabled. Request suggestions after successful live turns with known reasoning-summary settings, skipping replayed or duplicate completions and turns with queued follow-ups.
Generate suggestions in hidden, ephemeral forks of the completed turn, preserving conversation context and exposed live settings. Keep fork events out of the visible conversation and reject requests for user interaction. Cancel generation after 30 seconds, interrupt unsuccessful requests, and unsubscribe temporary threads.
Clear suggestions on new submissions, thread changes, reconnects, and feature disablement. Let Escape dismiss suggestions before entering backtrack mode.
## Testing
Add tests for live-turn eligibility and deduplication, preserved request prefixes and settings, hidden fork behavior, startup cancellation, and timeout cleanup.
GitOrigin-RevId: 92ddf3b06448adcc6f4330914cbd8102bff98046
Eric Traut
e154f7b807