Closes canvas audit item: MEDIUM keyboard-accessible node drag.
- Arrow keys move the selected node by 10px per press; Shift+Arrow
moves by 50px. Position is persisted to the backend via savePosition.
- The modal-dialog guard (same pattern as ? shortcut) prevents Arrow
keys from moving nodes when a modal like KeyboardShortcutsDialog is
open — dialogs own their own arrow semantics.
- All shortcuts guarded by the inInput check so Arrow keys still work
for text navigation inside inputs/textareas.
Changes:
- canvas.ts: new moveNode(dx, dy) store action — updates position
directly without the grow-parents pass that onNodesChange runs on
every drag tick (avoids edge-chase flicker).
- useKeyboardShortcuts.ts: Arrow key handler added.
- canvas.test.ts: new moveNode unit tests (position update, no-op,
savePosition call).
- useKeyboardShortcuts.test.tsx: new integration tests for all
keyboard shortcuts including the new Arrow key handlers.
- canvas-audit-items.md: Keyboard Shortcuts section upgraded to ✅,
drag item marked done.
- canvas-events.test.ts: fix pre-existing double-}); syntax error.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
