feat: 更新 user_agent 服务，增强用户代理功能

server/tests/test_user_agent_service.py

@@ -202,21 +202,37 @@ def test_user_agent_knowledge_answer_generation_uses_fast_timeouts(monkeypatch)
         assert captured["max_attempts"] == 1
 
 
-def test_user_agent_prefers_structured_knowledge_hit_for_answer_generation() -> None:
+def test_user_agent_prefers_structured_table_hit_for_standard_query() -> None:
     selected = UserAgentService._select_knowledge_model_hits(
         {
             "hits": [
                 {"content": "raw hit 1"},
                 {"content": "raw hit 2"},
                 {"content": "# 问答线索补充\n\n- 第二章 报销时限：费用发生后 30 日内提交申请。"},
-                {"content": "# 结构化表格补充\n\n| 项目 | 金额 |"},
+                {"content": "# 结构化表格补充\n\n| 项目 | 餐补 |\n| 其他地区 | 55 |"},
             ]
-        }
+        },
+        question="餐补标准是多少？",
     )
 
-    assert selected[0]["content"].startswith("# 问答线索补充")
-    assert selected[1]["content"].startswith("# 结构化表格补充")
-    assert selected[2]["content"] == "raw hit 1"
+    assert selected[0]["content"].startswith("# 结构化表格补充")
+    assert any(item["content"].startswith("# 结构化表格补充") for item in selected[:2])
+
+
+def test_user_agent_prefers_relevant_raw_hit_over_generic_appendix() -> None:
+    selected = UserAgentService._select_knowledge_model_hits(
+        {
+            "hits": [
+                {"content": "# 章节导航\n\n- 第一章 总则\n- 第二章 职责分工"},
+                {"content": "# 问答线索补充\n\n- 第二章 职责分工：计划财务部负责财务审核。"},
+                {"content": "一般性说明文字，没有探亲差旅归口信息。"},
+                {"content": "附表3：支出归口管理部门与归口业务范围\n组织人事部：探亲差旅、条件艰苦及安全风险较高区域补助等支出。"},
+            ]
+        },
+        question="探亲差旅归哪个部门管理？",
+    )
+
+    assert "组织人事部" in selected[0]["content"]
 
 
 def test_user_agent_uses_fast_knowledge_answer_without_model(monkeypatch) -> None:
@@ -266,6 +282,7 @@ def test_user_agent_uses_fast_knowledge_answer_without_model(monkeypatch) -> Non
         assert response.answer.startswith("张三，您好。")
         assert "当前能直接确认的是" in response.answer
         assert "30 日内提交报销申请" in response.answer
+        assert "## 依据" not in response.answer
         assert "答案整理阶段本轮没有及时返回" not in response.answer
 
 
@@ -314,6 +331,7 @@ def test_user_agent_fast_knowledge_answer_renders_relevant_table_preview() -> No
         assert answer is not None
         assert "| 项目 | 港澳台 | 其他地区 | 国外 |" in answer
         assert "| 餐补 | 75 | 55 | 140 |" in answer
+        assert "## 依据" not in answer
 
 
 def test_user_agent_fast_knowledge_answer_notes_missing_location_grounding() -> None:
@@ -360,6 +378,57 @@ def test_user_agent_fast_knowledge_answer_notes_missing_location_grounding() ->
 
         assert answer is not None
         assert "没有直接写出“北京”对应的地区档位或映射关系" in answer
+        assert "## 依据" not in answer
+
+
+def test_user_agent_fast_knowledge_answer_expands_lead_in_list_items() -> None:
+    session_factory = build_session_factory()
+    with session_factory() as db:
+        ontology = SemanticOntologyService(db).parse(
+            OntologyParseRequest(
+                query="出差记录链条中断时，要提供哪些业务佐证材料？",
+                user_id="pytest",
+                context_json={"session_type": "knowledge"},
+            )
+        )
+        service = UserAgentService(db)
+
+        answer = service._build_fast_knowledge_answer(
+            UserAgentRequest(
+                run_id=ontology.run_id,
+                user_id="pytest",
+                message="出差记录链条中断时，要提供哪些业务佐证材料？",
+                ontology=ontology,
+                context_json={
+                    "session_type": "knowledge",
+                    "user_input_text": "出差记录链条中断时，要提供哪些业务佐证材料？",
+                },
+                tool_payload={
+                    "result_type": "knowledge_search",
+                    "hits": [
+                        {
+                            "title": "费用报销制度",
+                            "content": (
+                                "第十三条 差旅费\n\n"
+                                "（2）出差记录链条中断时，应提供业务佐证材料：\n"
+                                "① 登机牌、高速道路通行记录、其他道路通行记录、租车记录等。\n"
+                                "② 支付记录。\n"
+                                "③ 出差审批邮件、短信、微信等。"
+                            ),
+                        }
+                    ],
+                },
+            ),
+            citations=[],
+        )
+
+        assert answer is not None
+        assert "当前能直接确认的是" in answer
+        assert "登机牌、高速道路通行记录" in answer
+        assert "支付记录" in answer
+        assert "出差审批邮件、短信、微信等" in answer
+        assert "（3）" not in answer
+        assert "## 依据" not in answer
 
 
 def test_user_agent_model_prompt_supports_contextual_personalization() -> None: