Replace hardcoded entity colors with D-033 relationship palette:
Player=#e0e8ff, Npc=unknown teal #4a9ebb, Object=grey #8b8ba0.
Phase 1 defaults by entity kind; Phase 2 (#361) will derive color
from RelationshipState via knowledge graph.
Entities in peripheral vision dimmed to 50% alpha (D-015).
Player entity gets a Polygon2D triangle indicator showing facing
direction, rotated from GameState.player_facing.
82 tests total, 0 failures.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>