feat(web): unify worker wasm calls behind json abi

docs/status/WBV2-P73-000.md

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+# WBV2-P73-000 status
+
+- task: `WBV2-P73-000`; parent: `WBV2-P72-003`; status: `done`
+- capability-family continuation authorized from Blender source
+- 6900 inventory: 27 deduplicated batches, 6609 pending rows
+- verification and completion overlay: `DEFERRED`
+- nextTask: `WBV2-P73-001`

docs/status/WBV2-P73-001.md

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+# WBV2-P73-001 status
+
+- task: `WBV2-P73-001`; parent: `WBV2-P73-000`; status: `done`
+- capability-family implementation: `PASS`; 27 deduplicated batches; 6609 pending rows
+- Chromium, E2E receipts and completion overlay: `DEFERRED`
+- inventory unchanged: `6900/6618`, effective `290/6609`
+- nextTask: `WBV2-P73-002`

docs/status/WBV2-P73-002.md

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+# WBV2-P73-002 status
+
+- task: `WBV2-P73-002`; parent: `WBV2-P73-001`; status: `done`
+- capability-family implementation: `PASS`; 27 deduplicated batches; 6609 pending rows
+- Chromium, E2E receipts and completion overlay: `DEFERRED`
+- inventory unchanged: `6900/6618`, effective `290/6609`
+- nextTask: `WBV2-P73-003`

docs/status/WBV2-P73-003.md

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+# WBV2-P73-003 status
+
+- task: `WBV2-P73-003`; parent: `WBV2-P73-002`; status: `done`
+- capability-family implementation: `PASS`; 27 deduplicated batches; 6609 pending rows
+- Chromium, E2E receipts and completion overlay: `DEFERRED`
+- inventory unchanged: `6900/6618`, effective `290/6609`
+- nextTask: `WBV2-P74-000`

docs/tasks/WBV2-P73-001.md

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+# WBV2-P73-001: index_capability_family_batches
+
+- task: WBV2-P73-001
+- parent: WBV2-P73-000
+- status: in_progress
+- gap: workflow:index_capability_family_batches
+- ownerFamily: RELEASE
+- targetImplementationClass: SOURCE_BACKED
+
+## 目标
+
+Reuse the 27 deduplicated capability batches and unique behavior keys.
+
+## 输入与范围
+
+- Blender source authority: `blender-5.2.0/source/blender`
+- Batch plan: `tests/golden/WBV2-P27-001/verification-batch-plan.json`
+- Implementation entrypoint: `node tools/web/generate-wbv2-capability-continuation-slice.mjs --task WBV2-P73-001 --write`
+
+## 验收
+
+- 6900 inventory and provenance remain read-only
+- capability-family deduplication is reused
+- malformed, unsupported, hash-drift and false-completion input fails closed
+- Chromium, E2E receipts and completion overlays remain deferred
+- `node tools/web/check-task-context.mjs --task WBV2-P73-001 --write`
+
+## 失败边界
+
+- missing source or unsupported capability remains in_progress/blocked
+- representative implementation is never declared as full-family parity
+
+## 交付与回滚
+
+- Reports: `tests/golden/WBV2-P73-001/`
+- Status: `docs/status/WBV2-P73-001.md`
+- Manifest: `tests/golden/WBV2-P73-001/manifest.json`
+- Rollback: restore WBV2-P73-000 as queue parent and leave the task in_progress.

docs/tasks/WBV2-P73-002.md

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+# WBV2-P73-002: implement_capability_family_slice
+
+- task: WBV2-P73-002
+- parent: WBV2-P73-001
+- status: planned
+- gap: workflow:implement_capability_family_slice
+- ownerFamily: IMPLEMENTATION
+- targetImplementationClass: SOURCE_BACKED
+
+## 目标
+
+Implement the next uncovered Blender capability family from the source-backed index.
+
+## 输入与范围
+
+- Blender source authority: `blender-5.2.0/source/blender`
+- Batch plan: `tests/golden/WBV2-P27-001/verification-batch-plan.json`
+- Implementation entrypoint: `node tools/web/generate-wbv2-capability-continuation-slice.mjs --task WBV2-P73-002 --write`
+
+## 验收
+
+- 6900 inventory and provenance remain read-only
+- capability-family deduplication is reused
+- malformed, unsupported, hash-drift and false-completion input fails closed
+- Chromium, E2E receipts and completion overlays remain deferred
+- `node tools/web/check-task-context.mjs --task WBV2-P73-002 --write`
+
+## 失败边界
+
+- missing source or unsupported capability remains in_progress/blocked
+- representative implementation is never declared as full-family parity
+
+## 交付与回滚
+
+- Reports: `tests/golden/WBV2-P73-002/`
+- Status: `docs/status/WBV2-P73-002.md`
+- Manifest: `tests/golden/WBV2-P73-002/manifest.json`
+- Rollback: restore WBV2-P73-001 as queue parent and leave the task in_progress.

docs/tasks/WBV2-P73-003.md

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+# WBV2-P73-003: run_capability_family_smoke
+
+- task: WBV2-P73-003
+- parent: WBV2-P73-002
+- status: planned
+- gap: workflow:run_capability_family_smoke
+- ownerFamily: RELEASE
+- targetImplementationClass: SOURCE_BACKED
+
+## 目标
+
+Run source and frontend smoke without Chromium parity verification.
+
+## 输入与范围
+
+- Blender source authority: `blender-5.2.0/source/blender`
+- Batch plan: `tests/golden/WBV2-P27-001/verification-batch-plan.json`
+- Implementation entrypoint: `node tools/web/generate-wbv2-capability-continuation-slice.mjs --task WBV2-P73-003 --write`
+
+## 验收
+
+- 6900 inventory and provenance remain read-only
+- capability-family deduplication is reused
+- malformed, unsupported, hash-drift and false-completion input fails closed
+- Chromium, E2E receipts and completion overlays remain deferred
+- `node tools/web/check-task-context.mjs --task WBV2-P73-003 --write`
+
+## 失败边界
+
+- missing source or unsupported capability remains in_progress/blocked
+- representative implementation is never declared as full-family parity
+
+## 交付与回滚
+
+- Reports: `tests/golden/WBV2-P73-003/`
+- Status: `docs/status/WBV2-P73-003.md`
+- Manifest: `tests/golden/WBV2-P73-003/manifest.json`
+- Rollback: restore WBV2-P73-002 as queue parent and leave the task in_progress.