feat: unify scoring and chat evidence pages

backend/tests/test_llm_and_rag.py

@@ -3,7 +3,7 @@ from PIL import Image, ImageDraw
 from sqlalchemy import select
 
 from wisegrade.llm import DeepSeekClient, FactResult, ModelError, ScoreResult, validate_score
-from wisegrade.models import AppSetting, KnowledgeChunk, Project, Student
+from wisegrade.models import AppSetting, KnowledgeChunk, KnowledgePage, Project, Student
 from wisegrade.rag import ingest, local_encoder, retrieve, split_pages
 from wisegrade.settings_store import model_config, save_model_config
 
@@ -82,12 +82,14 @@ def test_stale_knowledge_index_reuses_document_id(db):
                       title="报告", category="stage3", source_hash="same-source", pages=pages)
     old_chunk = db.scalar(select(KnowledgeChunk).where(KnowledgeChunk.document_id == document.id))
     old_chunk.text = "过时片段"
+    db.get(KnowledgePage, (document.id, 1)).text = "过时整页"
     document.index_version = 1
     db.commit()
     reindexed = ingest(db, course_version_id=1, project_id=project_id, submission_file_id=None,
                        title="报告", category="stage3", source_hash="same-source", pages=pages)
     assert reindexed.id == document.id and reindexed.index_version == 2
     assert db.scalar(select(KnowledgeChunk.text).where(KnowledgeChunk.document_id == document.id)) == pages[0]["text"]
+    assert db.get(KnowledgePage, (document.id, 1)).text == pages[0]["text"]
 
 
 def test_model_key_is_encrypted_and_hidden(db):