fix: restore chat citations and tool details

backend/tests/test_chat_sessions.py

@@ -168,6 +168,80 @@ def test_tool_record_redacts_text_and_secrets():
     assert "学生原文" not in str(saved) and "secret" not in str(saved) and "敏感评语" not in str(saved)
     assert "学生原文" not in chat_api._result_summary({"found": True, "citations": [{"quote": "学生原文"}]})
     assert "学生原文" not in str(chat_api._safe_result({"citations": [{"quote": "学生原文"}]}))
+    search = chat_api._safe_result({"found": True, "citations": [{"title": "报告.pdf", "page": 48,
+        "quote": "可核验片段", "url": "/api/pages/48", "api_key": "secret"}]}, "search_project_material")
+    assert search['citations'][0]['quote'] == '可核验片段'
+    assert 'secret' not in str(search)
+
+
+def test_late_citations_and_search_snippets_survive_restoration(session_factory, monkeypatch):
+    class FakeClient:
+        def tool_call(self, messages, _tools):
+            if not any(message['role'] == 'tool' for message in messages):
+                return {"role": "assistant", "content": None, "tool_calls": [
+                    {"id": f"find-{index}", "type": "function", "function": {"name": "search_project_material",
+                     "arguments": '{"project_id": 1, "query": "检索原文"}'}} for index in range(5)]}
+            return {"role": "assistant", "content": "综合报告第48页给出改进方向。", "tool_calls": []}
+
+    count = 0
+    def execute(_db, _conversation, _name, _arguments, _text):
+        nonlocal count
+        count += 1
+        page = 48 if count == 5 else count
+        return {"found": True, "citations": [{"document_id": 10, "chunk_id": count * 10 + index,
+            "title": "综合报告.pdf", "page": page, "quote": f"第{page}页原文片段{index}",
+            "url": f"/api/knowledge/documents/10/pages/{page}"} for index in range(6)]}
+
+    monkeypatch.setattr(chat_api, "client_for_chat", lambda _db: FakeClient())
+    monkeypatch.setattr(chat_api, "execute", execute)
+    client = client_for(session_factory)
+    try:
+        created = client.post('/api/conversations', json={"title": "引用恢复"}).json()
+        response = client.post(f"/api/conversations/{created['id']}/messages", json={"content": "总结"})
+        assert response.status_code == 200
+        detail = client.get(f"/api/conversations/{created['id']}").json()
+        answer = detail['messages'][-1]
+        assert len(answer['citations']) == 30
+        assert [item['page'] for item in answer['citations'][-6:]] == [48] * 6
+        assert answer['tool_calls'][-1]['result']['citations'][0]['quote'] == '第48页原文片段0'
+        assert detail['runs'][0]['tool_calls'][-1]['result']['citations'][0]['page'] == 48
+    finally:
+        app.dependency_overrides.clear()
+
+
+def test_large_score_result_keeps_structured_rows_for_model_and_history(session_factory, monkeypatch):
+    seen = []
+    class FakeClient:
+        def tool_call(self, messages, _tools):
+            if not any(message['role'] == 'tool' for message in messages):
+                return {"role": "assistant", "content": None, "tool_calls": [{"id": "score-call", "type": "function",
+                    "function": {"name": "get_scores", "arguments": '{"batch_id": 3}'}}]}
+            seen.append(messages[-1]['content'])
+            return {"role": "assistant", "content": "已读取评分项目。", "tool_calls": []}
+
+    def execute(_db, _conversation, _name, _arguments, _text):
+        return {"batch_id": 3, "count": 1, "project_offset": 0, "criterion_offset": 0,
+                "next_project_offset": None, "next_criterion_offset": 6,
+                "results": [{"project_id": 1, "student_no": "1001", "name": "学生甲", "totals": {},
+                             "url": "/?page=scores&batch_id=3&project_id=1", "total_rows": 22,
+                             "rows": [{"criterion_id": "C1", "criterion_name": "功能", "score_id": 7,
+                                       "model_score": 8, "teacher_score": None, "final_score": 8,
+                                       "max_score": 10, "status": "scored", "error": "", "evidence": []}]}],
+                "citations": [], "unrelated_large_field": "x" * 13000}
+
+    monkeypatch.setattr(chat_api, "client_for_chat", lambda _db: FakeClient())
+    monkeypatch.setattr(chat_api, "execute", execute)
+    client = client_for(session_factory)
+    try:
+        created = client.post('/api/conversations', json={"title": "评分恢复"}).json()
+        assert client.post(f"/api/conversations/{created['id']}/messages", json={"content": "查分"}).status_code == 200
+        assert seen and 'C1' in seen[0] and 'next_criterion_offset' in seen[0]
+        assert '结果过长' not in seen[0]
+        result = client.get(f"/api/conversations/{created['id']}").json()['messages'][-1]['tool_calls'][0]['result']
+        assert result['results'][0]['rows'][0]['criterion_id'] == 'C1'
+        assert result['next_criterion_offset'] == 6
+    finally:
+        app.dependency_overrides.clear()
 
 
 def test_upgrade_from_legacy_0003_preserves_history(session_factory):