* HelpOverlay used `key={key}` on each shortcut row, but several keys
legitimately repeat across contexts (`[t]` for Git view AND
Toggle engine pause; `[r]` for Refresh stats AND Refresh agent
detail). React threw "Encountered two children with the same
key" and the overlay crashed. Switch to index-based keys with a
comment explaining each row is unique by position.
* Refresh the help text: unified header tabs, Settings/Files/
Agents ←/→ pane swap, Git push/fetch shortcuts, Files hidden-
files toggle, Logs G jump-to-end.
* Main (status mode) header sometimes vanished after a tmux pane
switch and only resize fixed it. Two fixes:
- Remove the `rows < 10` auto-hide in MainHeader. tmux pane
switches can briefly report stale or zero dimensions, and the
transient `return null` orphaned the header.
- Wrap MainHeader and StatusBar in flexShrink={0} boxes inside
StatusModeGrid/StatusModeSingle (matching the prior
InteractiveMode fix) so Yoga can't squeeze them to 0 rows.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>