## Why
Leaving transcript selection with a held key can send repeated input to the composer and submit a preserved draft.
## What changed
- Route the transcript selection shortcut and selection controls in both the owned transcript and transcript overlay, preserving drafts and ignoring pastes outside search.
- Give fixed selection controls and pager motions precedence over conflicting key chords while allowing search and voice controls.
- Consume held exit keys across selection dismissal and asynchronous copy completion, and require fresh presses for composer submit and queue actions.
- Initialize overlay selection against the refreshed transcript frame and complete selection navigation when older history finishes loading.
## Testing
Add regression coverage for draft preservation, repeated `Enter` events, selection and search key precedence, refreshed-frame selection, and pending copy exit-key cleanup.
GitOrigin-RevId: 6cca9f399af1d49ff79337ae745cfc1564a14b88
Felipe Coury
964aeda627