Rebuild local Blender WASM environment and recovery evidence

docs/status/WBV2-P1-002.md

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+# WBV2-P1-002 Status
+
+status: done
+task: WBV2-P1-002
+gate: G1
+updated: 2026-08-25 America/New_York
+
+The minimal cube fixture exposes canonical SceneIR stable object/mesh IDs,
+topology counts, positions, and a bounded binary delta contract. Desktop and
+WASM/Main produce the same canonical summary and preserve it through
+save/reopen; malformed input is rejected without mutating the existing Main.
+
+Acceptance evidence:
+- generator exit: 0
+- desktop SceneIR field read and save/reopen exit: 0
+- `npm --prefix web run test:generated-gap -- --task WBV2-P1-002` exit: 0
+- `node tools/web/check-generated-gap.mjs --task WBV2-P1-002` exit: 0
+- stable IDs, canonical hash, and malformed no-mutation case are verified
+
+Artifacts:
+- report: `tests/golden/WBV2-P1-002/sceneir-report.json`
+- desktop report: `tests/golden/WBV2-P1-002/sceneir-desktop-report.json`
+- command log: `tests/golden/WBV2-P1-002/command.log`
+- fixture SHA-256: `09c4d34f7faf8b1755f8a59ecb533ebee61ac9821447c522e8fd41d7892ea9b34`
+- canonical SceneIR hash: `a0dc01a164bfa12bd27da51db914d854409273a69a15defb6630fcf8e77e396e`
+
+nextTask: WBV2-P1-003