- Fix 500 error when creating bins: missing updated_at column on bins table
(migration 013 adds the column, schema.sql updated)
- Add drag-and-drop support for moving asset cards/list rows onto bin rail items
with visual droppable highlight
- Add right-click context menu on project rail items (Rename/Delete)
- Expose RenameProjectModal via window so Library screen can reuse it
- Bins context menu already existed — was hidden by the 500 error
