Reorganize docs into category folders and drop the retired head-review page

Group the top-level docs into docs/project, docs/design, docs/assets and
docs/process, each with its own README index. Delete the superseded
docs/screens/head-review page and sheets. Rewrite every markdown link,
absolute docs path and tool/test reference to the new locations, fix the
pre-existing broken anchors and remove the dead Joke Shop photo-board link.
check_docs OK, Python tooling 167/167.

docs/README.md

@@ -1,42 +1,43 @@
 # Gig Line Documentation
 
-This folder holds the project documentation, visual references and generated QA evidence.
+Documentation is grouped by category. Product intent, the gap analysis and the release roadmap
+live in [`../PLAN.md`](../PLAN.md); the executable task list is [`../TODO.md`](../TODO.md); the
+workflow rules are in [`../AGENTS.md`](../AGENTS.md).
 
-## Current priorities
+## Categories
 
-1. [Quaternius NPC base migration](../TODO.md#quaternius-npc-base-migration-top-priority) — CC0 Quaternius mesh/animation source baked to the 24,000-budget runtime contract.
-2. [3D model and local map improvements](../TODO.md#3d-model-and-local-map-re-evaluation) — asset re-evaluation and local map reconstruction.
-3. [0.10.0 release candidate](../TODO.md#milestone-0100--3d-model-and-map-improvements-minor) — versioned release hardening after the unversioned development tracks.
+| Folder | Contents |
+| --- | --- |
+| [`project/`](project/README.md) | Architecture (arc42) and the implemented-features status |
+| [`design/`](design/README.md) | Gameplay, venues, UI copy, accessibility and known limitations |
+| [`assets/`](assets/README.md) | Blender library, asset tooling, NPC sourcing and the 3D model review |
+| [`process/`](process/README.md) | Setup/controls, release QA and the release runbook |
+| [`adr/`](adr/README.md) | Architecture Decision Records |
+| [`screens/`](screens/README.md) | Licensed references, concepts and screen designs |
+| [`blender_previews/`](blender_previews/README.md) | Committed character/gear/prop preview sheets |
+| [`screenshots/`](screenshots/README.md) | The committed in-game gallery |
 
 ## Start here
 
-- [`../PLAN.md`](../PLAN.md) — product, design intent and development priorities
-- [`../TODO.md`](../TODO.md) — priority-ordered active tasks and roadmap
-- [`npc-model-sourcing.md`](npc-model-sourcing.md) — character-source evaluation, licence rules and the character-development plan
-- [`makehuman-head-review.md`](makehuman-head-review.md) — retained MakeHuman fallback head, provenance and review verdict
-- [`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
-- [`../tools/README.md`](../tools/README.md) — tool inventory, categories and test runner
-- [`gameplay.md`](gameplay.md) — controls, venues and escalation
-- [`venues.md`](venues.md) — Hollywood, Joke Shop and TV Studio real-site mapping
-- [`3d-model-review.md`](3d-model-review.md) — 3D model re-evaluation: measurements, scorecard and ranked gaps
-- [`development-status.md`](development-status.md) — implemented features, current gaps and active planning
-- [`accessibility.md`](accessibility.md) — accessibility statement and known gaps
-- [`known-limitations.md`](known-limitations.md) — release-candidate blockers and accepted limits
-- [`release-qa.md`](release-qa.md) — manual smoke checklist and balance-acceptance protocol
-- [`../CREDITS.md`](../CREDITS.md) — credits and asset provenance
-- [`../PRIVACY.md`](../PRIVACY.md) — privacy note
-- [`ui-copy.md`](ui-copy.md) — screen, copy and button inventory
-- [`RELEASING.md`](RELEASING.md) — export, CI and publishing workflow
-- [`adr/README.md`](adr/README.md) — architecture decisions
+- [`../PLAN.md`](../PLAN.md) — product, design pillars, gap analysis and the roadmap to 1.0.0
+- [`../TODO.md`](../TODO.md) — milestone-ordered active tasks
+- [`project/architecture.md`](project/architecture.md) — system architecture and ownership
+- [`project/development-status.md`](project/development-status.md) — what the build supports now
+- [`design/gameplay.md`](design/gameplay.md) — the playable loop and escalation model
+- [`design/venues.md`](design/venues.md) — venue mapping and real-site evidence
+- [`assets/npc-model-sourcing.md`](assets/npc-model-sourcing.md) — the active NPC base and licence
+  rules
+- [`assets/3d-model-review.md`](assets/3d-model-review.md) — asset measurements and scorecard
+- [`process/getting-started.md`](process/getting-started.md) — setup, run/test and controls
+- [`../tools/README.md`](../tools/README.md) — tool inventory and test runner
+- [`../CREDITS.md`](../CREDITS.md) — credits, AI/reference provenance and licensing
+- [`../PRIVACY.md`](../PRIVACY.md) — local-only data and save files
 
-## Visual references
+## Current work
 
-- [`screens/README.md`](screens/README.md) — concepts, designs, screenshots and realism runs
-- [`blender_previews/README.md`](blender_previews/README.md) — character/gear/prop previews
-- [`screenshots/README.md`](screenshots/README.md) — committed game gallery
-- [`ui-copy.md`](ui-copy.md#screen-design-judge-report) — screen/button inventory and latest judge result
+v0.9.9 shipped the Quaternius NPC roster. The active patch line is `0.9.10` (roster follow-ups:
+outfit families, the Swat base orientation, per-slot atlases) through `0.9.12`, followed by the
+`0.10.0` public-readiness minor. See [`../TODO.md`](../TODO.md) for the live checklist.
 
 ## Quick preview