You lend your camping gear to a friend, borrow a drill from your neighbor, and swap a cookbook at your book club — and then promptly forget who has what. **Swap Meet** is a single-page app for tracking the stuff you've lent out, borrowed, and swapped with people in your life.

Build an app where users can:
- **Add an item** with a name, direction (lent / borrowed / swapped), the other person's name, and an optional due-back date
- **View all active swaps** in a clear list, visually differentiated by direction (e.g. color-coded or icon-tagged)
- **Mark an item as returned / completed**, moving it to a simple history section
- **See a summary count** of how many things are currently out on loan vs. owed back to them

All data must persist in `localStorage` so the list survives a page refresh. No backend, no login — just a clean, friendly interface that makes informal lending feel organized. The app should work entirely in a single browser page.