## What changed
Allow right-clicking inside the transcript or composer to copy its selected text using the existing clipboard status messages. Clear the selection only when the right-click copy is confirmed; retain it after failed or unconfirmed copies. Keyboard copies continue to retain composer selections.
Preserve the draft, cursor, and transcript reading position. Refresh composer layout before checking mouse coordinates, and respect modal and transcript input ownership.
## Testing
Add regression tests and snapshots covering copy outcomes, selection retention, reading position, editor bounds after layout changes, and input ownership.
GitOrigin-RevId: 322b303394378a20b2a25b3d218777c9ea65c92b