Consolidate architecture docs and add the v1.0.0 roadmap

Make architecture the canonical system/data-flow source, add explicit
documentation ownership and consolidation rules, and mark the old graphics plan
historical. Fix stale README/status/Blender/release claims. Add a full gap
register and milestone roadmap from v0.8 through v1.0.0, including onboarding,
content depth, accessibility/localization, performance, release/legal blockers
and non-blocking future ideas.

docs/plan-graphics-v0.6.md

@@ -1,7 +1,12 @@
 # Development Plan — Graphics Quality v0.6.0 (Blender-authored NPCs)
 
-> Status: Proposed · Target version: **v0.6.0** (MINOR)
+> Status: **Completed / historical** · Target version: **v0.6.0** (MINOR), followed by
+> v0.7.1's optional Forward+ Desktop HQ build
 > Companion decision: [ADR-0013](adr/0013-blender-authored-npc-characters.md)
+>
+> This is an implementation-history document. The current architecture is in
+> [`architecture.md`](architecture.md); remaining graphics work is tracked in
+> [`TODO.md`](../TODO.md), not as a revived phase plan.
 
 ## Why this exists
 
@@ -242,9 +247,9 @@ Props are grounded except `wall_lantern` and `marquee`; both may be emissive.
 2. **Higher-resolution environment textures:** regenerate brick/concrete/asphalt
    through `asset_pipeline.py` with normal maps, keeping the current UV scales;
    use the same sRGB/albedo + packed ORM discipline as the library assets.
-3. **Evaluate a desktop-only Forward+ preset** — done: it boots on the desktop Vulkan
-driver, but the renderer is project-wide and the Web preset must stay GL
-Compatibility. v0.6.0 keeps Compatibility; a desktop-only override is deferred.
+3. **Evaluate a desktop-only Forward+ preset** — completed in v0.7.1 as the optional
+Desktop HQ zip. The default renderer stays GL Compatibility for Web parity; the
+override is applied only to the copied HQ binaries.
 4. Regenerate `docs/screenshots/` with `capture_screenshots.gd`, then run
    `screen_designs.py compare` and `judge` as the regression gate, plus
    `blender_assets.py sheet` for the character/gear/prop library.