feat(web): add audio speaker and particle authoring

docs/tasks/WBV2-P33-002.md

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+# WBV2-P33-002: implement_particle_settings_authoring
+
+- task: WBV2-P33-002
+- parent: WBV2-P33-001
+- status: in_progress
+- gap: workflow:implement_particle_settings_authoring
+- ownerFamily: PARTICLE
+- targetImplementationClass: SOURCE_BACKED
+
+## 目标
+
+Connect bounded ParticleSettings property commands to Blender Main.
+
+## 输入与范围
+
+- Focused protocol: `web/protocol/web-engine.ts`
+- Implementation entrypoint: `node tools/web/generate-wbv2-audio-particle-slice.mjs --task WBV2-P33-002 --write`
+
+## 验收
+
+- real source or WebEngine Main path is wired
+- worker/client/frontend route uses typed protocol without a duplicate shim
+- malformed, unsupported, hash-drift or false-completion input fails closed
+- implementation smoke is reproducible; Chromium receipts, undo/redo, save/reopen and deterministic verification remain deferred
+- `node tools/web/check-task-context.mjs --task WBV2-P33-002 --write`
+
+## 失败边界
+
+- malformed and unsupported audio or particle payloads fail closed with a typed diagnostic
+- implementation evidence never changes historical inventory or provenance
+
+## 交付与回滚
+
+- Reports: `tests/golden/WBV2-P33-002/`
+- Status: `docs/status/WBV2-P33-002.md`
+- Manifest: `tests/golden/WBV2-P33-002/manifest.json`
+- Rollback: restore WBV2-P33-001 as queue parent and leave the task in_progress.