- Updated `data/missions.json` to increase difficulty in Chapter 4:
- Expanded enemy card pools with higher-tier units (Templars, Purifiers, Prophets, Archangels, Seraphs).
- Increased gold rewards for missions 022 through 028.
- Updated mission descriptions and lore to reflect the escalation.
- Enhanced `src/scenes/BattleScene.js` animations for Righteous abilities:
- Refactored `smite` animations to use new sprite frames (38, 39) and split cast/damage logic.
- Updated `overcharge` to use sprite 40/41 with pulse effects and integrated HP loss/ATK gain animations.
- Updated `fortify` to use sprite 37 with projectile travel and pulse effects, integrating armor gain animation.
- Updated `hack` to use sprite 42 with a 3-cycle pulse before executing copied skills.
- Added new audio assets:
- `fortify.mp3`, `hack.mp3`, `overcharge.mp3`, `smite-cast.mp3`, `smite-damage.mp3`.
- Updated `src/scenes/BootScene.js` to load the new audio files and removed deprecated smite sounds.
- Updated `assets/images/spritesheets/attacks.png` and `.psd` to include new animation frames.
