## Why
The TUI shortcut overlay used static labels for `Tab` and `Ctrl+C`, even
though both keys change behavior while a task is running. That made the
visible help misleading: idle `Tab` submits rather than queues, and
active-turn `Ctrl+C` interrupts rather than exits.
Closes#25531.
Closes#25564.
## What Changed
- Pass task-running state into the shortcut overlay renderer.
- Render `Tab` as `submit message` while idle and `queue message` while
work is running.
- Render `Ctrl+C` as `exit` while idle and `interrupt` while work is
running.
- Add snapshot coverage for the active-work shortcut overlay and update
idle overlay snapshots.
## How to Test
1. Start Codex and open the shortcut overlay with `?` while no task is
running.
2. Confirm the overlay shows `tab to submit message` and `ctrl + c to
exit`.
3. Start a task, then open or keep the shortcut overlay visible while
work is running.
4. Confirm the overlay shows `tab to queue message` and `ctrl + c to
interrupt`.
5. Type a follow-up prompt during active work and press `Tab`; confirm
it queues rather than submitting immediately.
Targeted tests:
- `just test -p codex-tui footer_snapshots`
- `just test -p codex-tui footer_mode_snapshots`
## Validation Notes
`just test -p codex-tui` currently has two unrelated guardian
feature-flag test failures on this base:
-
`app::tests::update_feature_flags_disabling_guardian_clears_manual_review_policy_without_history`
-
`app::tests::update_feature_flags_disabling_guardian_clears_review_policy_and_restores_default`
`just argument-comment-lint codex-rs/tui/src/bottom_pane/footer.rs`
could not run locally because the prebuilt wrapper requires `dotslash`;
the touched Rust diff was manually inspected for opaque positional
literals.
Felipe Coury
4e540b1076