Add morale roll system for NPCs with group support and automatic triggers:
- rollMorale() method for individual NPC morale checks (2d6 vs morale score)
- rollGroupMorale() static method uses lowest morale in selected tokens
- promptMoraleCheck() posts GM-whispered chat with clickable roll button
- Auto-prompt when NPC HP drops to half or below
- Chat button click handler for morale prompts
- Morale Check macro for quick group rolls
- Comprehensive test suite for morale functionality
Morale fails when 2d6 > morale score, setting moraleStatus.broken = true.
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
