4a2819695b
Replace colored-rectangle world rendering with a proper tilemap system using a 16x16 RPG tileset scaled 3x. Server generates terrain via seeded procedural generation (river, ponds, dirt patches, tree decorations) and sends it to clients. Client renders 3-layer Phaser tilemap with 8-neighbor autotiling for water/dirt edges. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>