袁聪的第二次提交，项目已完整

app/api/controllers/public_platform.py

@@ -4,11 +4,14 @@ from fastapi import APIRouter, Depends, Header
 from pydantic import Field
 
 from app.api.dependencies.auth import build_request_context
+from app.api.dependencies.rate_limit import enforce_rate_limit
 from app.api.schemas.admin import StrictPayload
+from app.api.schemas.conversations import HandoverRequest
 from app.core.contracts import RequestContext
 from app.service.public_platform_service import PublicPlatformService
 
-router = APIRouter(prefix="/api/v1", tags=["public-platform"])
+router = APIRouter(prefix="/api/v1", tags=["public-platform"],
+                   dependencies=[Depends(enforce_rate_limit)])
 
 
 class SessionCreate(StrictPayload):
@@ -59,6 +62,22 @@ async def get_handover(
     return await PublicPlatformService().handover(handover_id, context)
 
 
+# 转人工申请的唯一入口：必须走 PublicPlatformService.write("handover")，
+# 它在同一事务内写工单 + Outbox 事件（conversation.transfer_requested）+ 审计。
+# 历史上 conversations.py 另有一份只写审计的实现，因注册顺序覆盖了本入口，
+# 导致转人工的异步链路（Outbox → Worker）永不触发，已合并删除。
+@router.post("/conversations/{session_id}/handover-requests", status_code=202)
+async def request_handover(
+    session_id: str,
+    payload: HandoverRequest,
+    key: str | None = Header(default=None, alias="Idempotency-Key"),
+    context: RequestContext = Depends(build_request_context),  # noqa: B008
+) -> dict[str, Any]:
+    return await PublicPlatformService().write(
+        "handover", session_id, context, key, payload.model_dump()
+    )
+
+
 @router.get("/users/me/memory-profile")
 async def my_memory(
     context: RequestContext = Depends(build_request_context),  # noqa: B008