Fixed three TypeScript compilation errors:
1. game-config-helpers.ts:82 - Cast existing.config to object for spread
2. game-config-helpers.ts:116 - Fixed dynamic field assignment in updateGameConfigField
3. MatchingGameValidator.ts:540 - Use proper Difficulty type in MatchingGameConfig
Changes:
- Import Difficulty and GameType from matching types
- Update MatchingGameConfig to use proper union types
- Cast existing.config as object before spreading
- Rewrite updateGameConfigField to avoid type assertion issue
All TypeScript errors resolved. Compilation passes cleanly.
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Co-Authored-By: Claude <noreply@anthropic.com>