fix: label citation links by their actual target

backend/tests/test_chat_agent.py

@@ -83,7 +83,8 @@ def test_get_scores_pages_projects_and_criteria(db, monkeypatch):
                 "rows": [{"criterion": {"criterion_id": f"C{index}", "name": f"评分项{index}", "max_score": 10},
                           "score_id": index, "model_score": 8, "teacher_score": None, "final_score": 8,
                           "status": "scored", "error": "", "evidence": [{"page": index + 1,
-                              "quote": "证据" * 200, "document": "报告.pdf", "image_url": None}]}
+                              "quote": "证据" * 200, "document": "报告.pdf",
+                              "image_url": f"/api/assets/{item.id}/1" if index == 0 else None}]}
                          for index in range(14)]}
 
     monkeypatch.setattr(agent_tools, "project_result", result)
@@ -92,6 +93,10 @@ def test_get_scores_pages_projects_and_criteria(db, monkeypatch):
     assert first_page["results"][0]["project_id"] == first.id
     assert len(first_page["results"][0]["rows"]) == 6
     assert first_page["next_criterion_offset"] == 6 and first_page["next_project_offset"] == 1
+    assert first_page["citations"][0]["url"] == f"/?page=scores&batch_id={created['id']}&project_id={first.id}"
+    assert first_page["citations"][0]["image_url"] == f"/api/assets/{first.id}/1"
+    assert first_page["citations"][1]["url"] == first_page["citations"][0]["url"]
+    assert first_page["citations"][1]["image_url"] is None
     assert len(json.dumps(first_page, ensure_ascii=False)) < 12000
     later = execute(db, conversation, "get_scores", {"batch_id": created["id"],
         "project_offset": 1, "criterion_offset": 12}, "")