M2a：镜树域后端核心——树/节点/引文/归真/移栽全量 API 与 Kernel 完成回调（芽体固化/残答封存），8 用例钉死 PRD 场景 1/2/3/5/6/7/8

backend/app/domains/jingsheng/seat.py

@@ -71,24 +71,15 @@ async def emit_seat_event(
     requester: str | None = None,
 ) -> None:
     """事务外发射命台事件（一炁，visibility=internal）。"""
-    from app.modules.runtime.events import Event
-    from app.services.event_store import DbEventStore
+    from app.domains import one_qi
 
-    from app.domains.jingsheng import service as jingsheng_service
-
-    store: DbEventStore | None = jingsheng_service._event_store  # noqa: SLF001
-    if store is None:
-        return
     payload: dict = {"holder": holder, "epoch": epoch}
     if requester is not None:
         payload["requester"] = requester
-    await store.append(
-        Event(
-            type=event_type,
-            source="jingsheng",
-            payload=payload,
-            visibility="internal",
-            run_id=None,
-            character_id=character_id,
-        )
+    await one_qi.emit(
+        event_type,
+        character_id=character_id,
+        payload=payload,
+        visibility="internal",
+        source="jingsheng",
     )

backend/app/domains/jingsheng/service.py

@@ -16,14 +16,12 @@ from app.models.character import Character
 from app.models.jingsheng import Custodianship, EmbryoDraft, IdentityRecord, RuntimeSeat
 from app.services.event_store import DbEventStore
 
-# 事件由服务层经一炁落库（DbEventStore 由调用方注入；默认取进程级装配）
-_event_store: DbEventStore | None = None
+from app.domains import one_qi
 
 
 def bind_event_store(store: DbEventStore) -> None:
-    """lifespan 装配时注入事件存储。"""
-    global _event_store
-    _event_store = store
+    """lifespan 装配时注入事件存储（委托共享绑定）。"""
+    one_qi.bind_event_store(store)
 
 
 async def _emit(
@@ -34,19 +32,12 @@ async def _emit(
     payload: dict,
     visibility: str = "public",
 ) -> None:
-    from app.modules.runtime.events import Event
-
-    if _event_store is None:
-        return
-    await _event_store.append(
-        Event(
-            type=event_type,
-            source="jingsheng",
-            payload=payload,
-            visibility=visibility,  # type: ignore[arg-type]
-            run_id=None,
-            character_id=character_id,
-        )
+    await one_qi.emit(
+        event_type,
+        character_id=character_id,
+        payload=payload,
+        visibility=visibility,
+        source="jingsheng",
     )