- Native HTML5 drag & drop between categories with drop-target highlight
- Virtualized item lists via @tanstack/react-virtual (fixed 34px rows)
- Auto-batching of large groups (500 items / 50 groups per run)
- Duplicate detection against the destination page with badge + summary
- Per-category layout preview grid
- Undo history for item moves (single + batch, tracks source groups)
- Days-range selector to load older imports (30/60/90/180)
- LocalStorage persistence of user settings (mode, destination, price, days)
- Added translation keys across all 25 locales