Two small fixes for the batch-action toolbar:
1. The deselect button's title says "Clear selection (Escape)" — but
pressing Escape did NOTHING. The title has been lying since the bar
shipped. Now wired: window keydown handler calls clearSelection
when Esc fires. Skipped while the confirm dialog is open
(`pending !== null`) so the dialog's own Esc-cancels takes
precedence, and skipped during a busy in-flight action so the
user can't strand a partial-failure mid-flight.
2. focus-visible:ring-zinc-500/70 → focus-visible:ring-accent/50
on the deselect button. The hardcoded zinc broke the semantic-
token pattern used by the other action buttons.
Tests: two new vitest cases — Esc clears with selection, Esc no-op
when empty (the bar isn't mounted at count===0 so the listener never
registers). Full suite: 1222/1222.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>