You're helping a friend pack up their apartment to move across town. They need a quick, no-fuss tool to label each moving box and keep a running tally of how many boxes they have per room.

Build a single-page app where the user can:
- Type a box label (e.g. "Kitchen – Fragile", "Bedroom – Books") and assign it to a room category (Kitchen, Bedroom, Bathroom, Living Room, Other)
- Click **Add Box** to log it to a list
- See all boxes listed with their room category and a sequential box number (Box #1, Box #2, …)
- Delete individual boxes from the list
- See a live summary count at the top showing how many boxes belong to each room

The list should persist through the session (no page-refresh wipe). No auth, no backend — just a clean, usable little packing assistant that a frazzled mover would actually find helpful on moving day.