Fix a room tag that does not appear

Close any gap or collision between walls so the room is properly enclosed and its room tag appears.

1. A room label or room tag is only shown when the room is properly enclosed.

   ✓ 已于 2026年10月19日 在产品中核实

2. If there is a gap or a collision between walls, the room tag will not appear in that area.

   ✓ 已于 2026年10月19日 在产品中核实