成绩复盘与 PC 端上传优化：各科考试状态多选及树状统计。

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/app/routers/exams.py

@@ -1,3 +1,4 @@
+import json
 import uuid
 
 from fastapi import APIRouter, Depends, HTTPException, Query, status
@@ -6,13 +7,37 @@ from sqlalchemy.orm import Session, joinedload
 from app.core.database import get_db
 from app.core.deps import get_current_user
 from app.models.user import ExamRecord, SubjectScore, User
-from app.schemas import ExamCreate, ExamOut, ExamUpdate, ScoreOut, TrendResponse
+from app.schemas import ExamCreate, ExamOut, ExamUpdate, ReviewStatusEnum, ScoreOut, TrendResponse
 from app.services.score_trend import build_trend
 from app.services.student_access import get_student_for_user
 
 router = APIRouter(tags=["exams"])
 
 
+def _parse_review_statuses(raw: str | None) -> list[ReviewStatusEnum]:
+    if not raw:
+        return []
+    try:
+        data = json.loads(raw)
+    except json.JSONDecodeError:
+        return []
+    if not isinstance(data, list):
+        return []
+    result: list[ReviewStatusEnum] = []
+    for item in data:
+        try:
+            result.append(ReviewStatusEnum(str(item)))
+        except ValueError:
+            continue
+    return result
+
+
+def _serialize_review_statuses(statuses: list[ReviewStatusEnum] | None) -> str | None:
+    if not statuses:
+        return None
+    return json.dumps([s.value for s in statuses], ensure_ascii=False)
+
+
 def _score_to_out(score: SubjectScore) -> ScoreOut:
     return ScoreOut(
         id=score.id,
@@ -21,6 +46,7 @@ def _score_to_out(score: SubjectScore) -> ScoreOut:
         total_score=float(score.total_score),
         obtained_score=float(score.obtained_score),
         ratio=float(score.ratio),
+        review_statuses=_parse_review_statuses(score.review_statuses_json),
     )
 
 
@@ -45,6 +71,7 @@ def _apply_scores(db: Session, exam: ExamRecord, scores_data):
                 total_score=item.total_score,
                 obtained_score=item.obtained_score,
                 ratio=ratio,
+                review_statuses_json=_serialize_review_statuses(item.review_statuses),
             )
         )