Rebuild local Blender WASM environment and recovery evidence

docs/status/WBV2-P2-001.md

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+# WBV2-P2-001 status
+
+- task: `WBV2-P2-001`
+- parent: `WBV2-P1-005`
+- parity: `EDITOR.OPEN_SCENE`
+- implementationClass: `LOCAL_EXACT`
+- status: `done`
+- fixture: `tests/files/web/generated/WBV2-P2-001-EDITOR.OPEN_SCENE.blend`
+
+## Evidence
+
+- Desktop and WASM expose the same stable scene, collection, mesh object, active object, and selection IDs.
+- `editorWorkflowStatus=AVAILABLE`; `context.revision=1` matches the desktop selection revision.
+- Missing context is structured as `pinnedData=null` and `library=null`.
+- Desktop save/reopen and WASM save/reopen preserve editor context, collections, scenes, and nodes exactly.
+- Malformed blend input is rejected without mutating the open Main.
+
+## Commands
+
+- `npm --prefix web run test:generated-gap -- --task WBV2-P2-001`
+- `node tools/web/check-generated-gap.mjs --task WBV2-P2-001`
+- `node tools/web/check-task-context.mjs --task WBV2-P2-001 --write`
+
+## Handoff
+
+- nextTask: `WBV2-P2-002`
+- queue mutation: allowed after manifest and parent hash validation