1b0da25887
Replace magic food POI system with berry bush clusters as gatherable resource tiles. Berry bushes track depletion state (berryCount, maxBerries, ticksSinceLastRegrowth). Remove PointOfInterest interface and all POI methods from GameMap, stub out closestPOI in npcBrainSystem for later rework, and update all tests and serializers. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>