## Why
Queued-message edit hints could vary by terminal instead of showing the first configured shortcut. Use the keymap consistently for queued messages and async question navigation.
## What changed
- Make `Shift+Left` the primary shortcut for advancing through questions and editing the last queued message, and `Shift+Right` for navigating back toward the composer. Keep `Alt+Up` and `Alt+Down` as alternatives.
- Remove terminal-specific hint selection and derive hints from the configured keymap, including custom chords and unbound actions.
- Update question footers, queued-input previews, and keymap picker snapshots to reflect the preferred shortcuts.
## Testing
Extend tests to cover both default shortcut pairs, configured shortcut ordering, custom chord hints, and hiding the queued-message edit hint when the action is unbound.
GitOrigin-RevId: e0f60860ef1e81c71ca0fc32369b8cbd12582b47
Ian MacLeod
591ffb1aae