Refactored keyboard handler to use refs (kbStateRef, kbActionsRef) for
all mutable state and actions. This ensures the single stable event
listener always reads fresh values instead of relying on effect
dependency re-registration which could miss updates.
Also fixed selection highlight visibility: replaced bg-accent (too
subtle) with bg-primary/10 + outline-primary/30 which is clearly
visible in both light and dark modes.
Co-Authored-By: Paperclip <noreply@paperclip.ing>
dotta
c33dcbd202