Replaces the single flat grey tile. Adds tools/build_tiles.py (atlas builder
with edge-blending + tone matching), paint_terrain.py (surgical tile-plane
repaint: asphalt base, concrete pads, dirt blobs, groove patches near wax,
rubble clumps), jitter_wax.py, render_map.py (offline map preview), and
check_assets.py.
Also fixes the arena harness being rigged: both wax fields sat ~12 cells from
BotA and ~18 from BotB, so BotB starved for map reasons, not balance reasons.
Arena wax is now mirrored (7.1/18/18/19.8 from both starts). Seep interval
90 -> 20 after telemetry showed the slower rate still drained both economies.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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