fix: restore chat citations and tool details

backend/tests/test_chat_agent.py

@@ -9,7 +9,7 @@ from fastapi import HTTPException
 from fastapi.testclient import TestClient
 from sqlalchemy import select
 
-from wisegrade import chat_api, services
+from wisegrade import agent_tools, chat_api, services
 from wisegrade.actions import confirm, prepare
 from wisegrade.agent_tools import execute
 from wisegrade.db import get_db
@@ -70,6 +70,36 @@ def test_tool_scope_snapshots_and_project_citations(db):
     assert rules["source"] == "batch_snapshot"
 
 
+def test_get_scores_pages_projects_and_criteria(db, monkeypatch):
+    first = add_project(db, "123450010")
+    second = add_project(db, "123450011")
+    created = services.create_batch(SimpleNamespace(course_version_id=1, rubric_version_id=1), db)
+    conversation = Conversation(title="分页评分", batch_id=created["id"])
+    db.add(conversation)
+    db.commit()
+
+    def result(_db, _batch, item):
+        return {"student_no": f"{item.id}", "name": "学生", "totals": {"overall": 80},
+                "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}]}
+                         for index in range(14)]}
+
+    monkeypatch.setattr(agent_tools, "project_result", result)
+    first_page = execute(db, conversation, "get_scores", {"batch_id": created["id"]}, "")
+    assert first_page["count"] == 2 and len(first_page["results"]) == 1
+    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 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}, "")
+    assert later["results"][0]["project_id"] == second.id
+    assert [row["criterion_id"] for row in later["results"][0]["rows"]] == ["C12", "C13"]
+    assert later["next_project_offset"] is None and later["next_criterion_offset"] is None
+
+
 def test_import_confirmation_hash_change_index_and_idempotency(environment, db, monkeypatch, session_factory):
     folder = environment / "inbox" / "batch" / "123450003_张三_机器人"
     folder.mkdir(parents=True)