chore: checkpoint web Blender feature-gap work, docs and tests

- update native web_engine sources and rebuilt wasm artifacts
- add task cards, status notes and tooling scripts
- add web e2e specs, tutorial UI sources and tutorial assets
- sync golden task manifests and audit records

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

docs/EXECUTION_QUEUE.md

@@ -16,10 +16,10 @@
 
 | 字段 | 值 |
 | --- | --- |
-| 里程碑 | WBV2 capability workflow |
-| 当前任务 | `WBV2-P1424-001` |
-| parent manifest | `tests/golden/WBV2-P1424-000/manifest.json` |
-| 任务卡 | [`tasks/WBV2-P1424-001.md`](tasks/WBV2-P1424-001.md) |
+| 里程碑 | 三域全量对标（创建模型 / 模型化 / 模型层级） |
+| 当前任务 | `WBV2-P1425-001` |
+| parent manifest | `tests/golden/WBV2-P1425-000/manifest.json` |
+| 任务卡 | [`tasks/WBV2-P1425-001.md`](tasks/WBV2-P1425-001.md) |
 | 专项验收 | `node tools/web/check-execution-control-plane.mjs` |
 | legacy coverage checkpoint | `M16-GAP-00282` |
 | legacy coverage parent | `tests/golden/M16-GAP-00281/manifest.json` |