feat(server): PATCH /api/sessions/{sid} 会话重命名 + service.rename_session

src/genesis/server/app.py

@@ -56,6 +56,10 @@ class SessionCreate(BaseModel):
     project: str | None = None
 
 
+class SessionRename(BaseModel):
+    name: str
+
+
 class ProjectCreate(BaseModel):
     name: str
     display_name: str = ""
@@ -189,6 +193,17 @@ def create_app(
             raise _error(404, "SESSION_NOT_FOUND", f"会话不存在: {sid}")
         return rec.to_dict
 
+    @app.patch("/api/sessions/{sid}")
+    def rename_session(sid: str, body: SessionRename):
+        name = (body.name or "").strip()
+        if not name:
+            raise _error(400, "INVALID_NAME", "会话名不能为空")
+        try:
+            rec = service.rename_session(sid, name)
+        except SessionNotFoundError:
+            raise _error(404, "SESSION_NOT_FOUND", f"会话不存在: {sid}")
+        return {"session_id": rec.session_id, "name": rec.name}
+
     @app.delete("/api/sessions/{sid}")
     def delete_session(sid: str):
         ok = service.store.delete_session(sid)

src/genesis/server/service.py

@@ -122,6 +122,10 @@ class GenesisService:
     def get_session(self, session_id: str) -> SessionRecord:
         return self.store.get_session(session_id)
 
+    def rename_session(self, session_id: str, name: str) -> SessionRecord:
+        """重命名会话（历史项「重命名」）。name 由调用方保证非空。"""
+        return self.store.update_session(session_id, name=name)
+
     def rag_stats(self, session_id: str) -> dict:
         """仅读返回 RAG 索引状态：片段数 / 是否启用。供前端 RAG 开关徽标使用。"""
         chunks = 0

tests/test_server_api.py

@@ -357,3 +357,23 @@ def test_api_list_sessions_filter_by_project(client):
     ids = {x["session_id"] for x in res.json()}
     assert r0.json()["session_id"] in ids
     assert r1.json()["session_id"] not in ids
+
+def test_api_rename_session(client):
+    sid = client.post("/api/sessions", json={"user_id": "u1"}).json()["session_id"]
+    r = client.patch("/api/sessions/" + sid, json={"name": "股票系统需求"})
+    assert r.status_code == 200
+    assert r.json()["name"] == "股票系统需求"
+    assert client.get("/api/sessions/" + sid).json()["name"] == "股票系统需求"
+
+
+def test_api_rename_session_empty_name(client):
+    sid = client.post("/api/sessions", json={"user_id": "u1"}).json()["session_id"]
+    r = client.patch("/api/sessions/" + sid, json={"name": "   "})
+    assert r.status_code == 400
+    assert r.json()["detail"]["code"] == "INVALID_NAME"
+
+
+def test_api_rename_session_not_found(client):
+    r = client.patch("/api/sessions/nope", json={"name": "x"})
+    assert r.status_code == 404
+    assert r.json()["detail"]["code"] == "SESSION_NOT_FOUND"