chore: checkpoint web Blender migration source, tools and docs

Accumulated uncommitted work: GHOST Web backend, WebGL/GPU web layer,
web workflow engine and protocol, tooling, docs and task records.
Large generated evidence, user-testing archives, build snapshots and
imported test assets remain untracked.

Co-Authored-By: Claude Code <noreply@anthropic.com>

docs/tasks/WBV2-P1069-000.md

@@ -0,0 +1,35 @@
+# WBV2-P1069-000: authorize_capability_family_wave
+
+- task: WBV2-P1069-000
+- parent: WBV2-P1068-003
+- status: in_progress
+- gap: workflow:authorize_capability_family_wave
+- ownerFamily: PROGRAM
+- targetImplementationClass: SOURCE_BACKED
+
+## 目标
+
+Authorize the next capability-family implementation wave from Blender source.
+
+## 输入与范围
+
+- Blender source authority: `blender-5.2.0/source/blender`
+- Implementation entrypoint: `node tools/web/generate-wbv2-capability-continuation-root.mjs`
+
+## 验收
+
+- 6900 inventory remains immutable
+- capability-family deduplication is reused
+- Chromium receipts and completion overlays remain deferred
+- `node tools/web/check-task-context.mjs --task WBV2-P1069-000 --write`
+
+## 失败边界
+
+- missing source, unsupported capability or hash drift remains in_progress/blocked
+
+## 交付与回滚
+
+- Reports: `tests/golden/WBV2-P1069-000/`
+- Status: `docs/status/WBV2-P1069-000.md`
+- Manifest: `tests/golden/WBV2-P1069-000/manifest.json`
+- Rollback: restore WBV2-P1068-003 as queue parent and leave the wave in_progress.