Arrow keys now move the currently-selected object by 1 scene unit;
Shift bumps the step to 10. Works for both regular layers
(upsertKeyframe at the playhead — same write path as a stage drag)
and clip instances (setClipInstanceTransform). Locked targets and
events originating in text inputs are passed through untouched, so
typing in the document drawer / rename dialogs isn't stolen.
Also drops the flaky show-locked persistence test. It assumed the
in-memory default (true) differed from the stored value; on a
fresh dev-server restart with empty localStorage the first toggle
was a no-op, the watch never fired, and the assertion failed.
Test now flips the ref away first so every subsequent transition
is guaranteed to write.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
thandClaude Opus 4.7
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