Establish the 0.9.4 NPC visual baseline

Add a neutral 48-frame character contact sheet, acceptance criteria and ranked baseline gaps, plus repeatable sheet/comparison tooling. No character GLB or runtime mesh changes.

docs/README.md

@@ -11,6 +11,7 @@ This folder holds the project documentation, visual references and generated QA
 - [`architecture.md`](architecture.md) — arc42 system architecture
 - [`getting-started.md`](getting-started.md) — setup, run/test commands and controls
 - [`asset-tooling.md`](asset-tooling.md) — image/model pipelines and screenshot gates
+- [`npc-visual-review.md`](npc-visual-review.md) — NPC visual baseline, acceptance criteria and ranked gaps
 - [`development-status.md`](development-status.md) — implemented features and current gaps
 - [`smoke-checklist.md`](smoke-checklist.md) — manual verification
 - [`ui-copy.md`](ui-copy.md) — screen, copy and button inventory