- reduce PLAN.md from a 674-line implementation log to a 187-line product/design
plan; keep escalation, venues, NPC/systems, controls, presentation and constraints
- refresh README for implemented venues, Blender/v2 assets, the custom test runner,
Web target, current release state and the screenshot smoke
- update architecture for 0.6.0, the runtime art loader, Gitea CI/build/publish,
Web deployment, six release artifacts and visual regression
- remove stale uncommitted/active-pass claims from MEMORY and point it at the
current NPC follow-ups; move the completed documentation task to DONE