Fixes, Improvements, and Additions 1/25 ver.e0002bugfix07

Fixes
- Fixed an issue where map notes were not saved when using a save point on the surface.
- Fixed a bug where the completion rate in the ending was not calculated correctly.
Improvements
- Slightly increased the speed at which keys disappear when they fall to the ground without hitting enemies, and increased their damage.
- Slightly increased the damage of hand grenades.
- Slightly increased the explosion damage of bouncing bombs.
Additions
- Added an item used in New Game Plus to raise affinity with a specific character. It occupies a power‑up item slot but has no direct effect.
Along with this, adjusted the witch’s affinity conditions in New Game Plus so that doing similar actions to the first playthrough will raise her affinity.
Also, items obtained during the first playthrough will no longer appear in the shop after starting New Game Plus.