feat(04-04): add ListDetail with active/completed split + ItemRow + AddItemInput (LIST-02)
- listsClient.ts: add fetchListItems, addItem, patchListItem, deleteItem + ListItemsResponse type
- ListDetail.tsx: replace placeholder with real implementation — useQuery(['list', listId])
with 30s polling fallback (D-12); active/completed split (D-05); optimistic mutations (D-07);
delete-wins no-rollback (D-09); per-field check PATCH (D-08)
- ItemRow.tsx: 44px touch target, checkbox (20px visual/44px touch, accent fill when checked),
plain-text item text (T-04-06 XSS guard), GripVertical handle slot for Plan 05,
hover Trash2 delete + swipe-left zone, transform 150ms ease-out animation slot (D-14)
- AddItemInput.tsx: sticky bottom input + Add button, disabled when empty, Enter key support
- ListDetail.test.tsx: 7 real tests replacing todo stubs — optimistic add/check/uncheck/delete,
rollback on error, D-05 completed-sink split, D-09 delete-wins no-rollback
- Playwright browser check: add milk → sinks to Completed on check → vanishes on delete PASS
Lucas Berger
6da9c2ae7b