feat(chat): agent 产出进度/错误时发射事件（保留持久化兜底）

tests/test_chat_agent_ws.py

@@ -0,0 +1,32 @@
+import tempfile
+
+from genesis.chat.agent import ChatAgent
+from genesis.server.service import GenesisService
+from genesis.server.store import ProjectsStore, SessionStore
+
+_tmp = tempfile.mkdtemp(prefix="genesis_ws_")
+
+
+def _make_agent(sink):
+    store = SessionStore(db_path=f"{_tmp}/sessions.db")
+    projects = ProjectsStore(db_path=f"{_tmp}/projects.db")
+    svc = GenesisService(store=store, data_root="data", engine="fake", projects=projects)
+    return ChatAgent(service=svc, fake=True, engine="fake", progress_sink=sink)
+
+
+def test_agent_emits_progress_events():
+    events = []
+    agent = _make_agent(events.append)
+    sid = agent.service.create_session("u1").session_id
+    agent._emit_progress(sid, {"step": "parse", "status": "ok", "detail": "解析完成"})
+    assert events and events[0]["type"] == "progress"
+    assert events[0]["step"] == "parse"
+
+
+def test_agent_emits_error_event():
+    events = []
+    agent = _make_agent(events.append)
+    sid = agent.service.create_session("u1").session_id
+    agent._emit_error(sid, "解析失败：boom", "generate")
+    errs = [e for e in events if e["type"] == "error"]
+    assert errs and "boom" in errs[0]["detail"]