Ritsus Offhand Key

### v1.0.1 – Stability & Compatibility Update

**Fixed**
- The mod no longer interferes with vanilla right-click actions.  
  Shields, bows, and other main-hand interactions now behave exactly as in vanilla when using the default right-click.

**Improved**
- Added input stability handling (grace period) to prevent offhand use from being interrupted by brief input drops.  
  Holding the offhand key is now smoother and more reliable, even during intense combat or when performing multiple actions at once.

**Behavior**
- Offhand use triggered by this mod is now tracked separately from vanilla input, ensuring clean start/stop behavior without affecting normal gameplay.
- The mod still only activates for items that consume a right-click action (e.g., shields, bows, potions, food, totems).

This update should make the offhand key feel much closer to native vanilla input, while remaining fully client-side and multiplayer-safe.