perf(runner): draw static world faces via the surface cache

[tannevaled]

Wires the surface-cache primitives (#20) into the world-face draw — the payoff of the renderer perf work.

What

A face is cacheable when its lightmap is constant over time — fullbright (LightOfs<0) or every active lightstyle is style 0 ('m', the only time-independent style) — and its texture is not animated (no + chain). Such a face is baked once via BakeSurface into a per-face CachedSurface (keyed by face index, persisted for the map's lifetime — static faces never change, so no invalidation) and painted with FillPerspectiveCachedPolygon: a single fetch+store per pixel instead of a per-pixel lightmap bilinear + colormap lookup.

Animated faces (flickering lights, + textures) keep the per-pixel lightmapped path; sky/turbulent unchanged.

texMinS/texMinT come straight from lmInfo.MinS/MinT (TransformFaceLightmapped defines LmS=(U-MinS)/16, and the cache is indexed by LmS*16 / LmT*16).

Verification (Firefox/Playwright, lq_e0m1)

• Pixel-identical render to the per-pixel path — walls fully textured + lit, no artifacts (screenshot).
• Same scene, identical throttled harness: 1.32 → 1.56 fps (+18%).
• Scene-dependent: larger in wall-heavy views, bounded here by the ~half-screen of (uncached) water + sky. The isolated cached fill benchmarks 2.45× faster than the lightmapped fill (feat(render): surface-cache primitives (baked fill + BakeSurface) #20).

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