修正 AI 复盘解读：按日期顺序、得分率与科目专属建议。

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

backend/app/routers/exams.py

@@ -37,26 +37,57 @@ def _subject_display_name(score: SubjectScore) -> str:
     return score.subject.name if score.subject else f"科目{score.subject_id}"
 
 
-def _build_review_records_text(exams: list[ExamRecord], subject_name: str) -> str:
-    lines: list[str] = []
-    for exam in sorted(exams, key=lambda item: item.exam_date, reverse=True):
+def _build_review_insight_context(exams: list[ExamRecord], subject_name: str) -> str:
+    entries: list[tuple[ExamRecord, SubjectScore, list[ReviewStatusEnum]]] = []
+    status_counts = {status: 0 for status in ReviewStatusEnum}
+
+    for exam in exams:
         for score in exam.scores:
             if _subject_display_name(score) != subject_name:
                 continue
             statuses = _parse_review_statuses(score.review_statuses_json)
             if not statuses:
                 continue
-            type_label = _EXAM_TYPE_LABELS.get(exam.exam_type.value, exam.exam_type.value)
-            status_text = "、".join(_REVIEW_STATUS_LABELS.get(s, s.value) for s in statuses)
-            ratio = float(score.ratio) * 100
-            line = (
-                f"- {exam.exam_date} {type_label} "
-                f"得分{float(score.obtained_score):g}/{float(score.total_score):g}({ratio:.1f}%) "
-                f"状态:{status_text}"
-            )
-            if exam.title:
-                line += f" 备注:{exam.title}"
-            lines.append(line)
+            entries.append((exam, score, statuses))
+            for status in statuses:
+                status_counts[status] += 1
+
+    if not entries:
+        return ""
+
+    entries.sort(key=lambda item: (item[0].exam_date, item[0].created_at))
+    total = len(entries)
+
+    summary_parts = [
+        f"{_REVIEW_STATUS_LABELS[s]}{status_counts[s]}次"
+        for s in ReviewStatusEnum
+        if status_counts[s] > 0
+    ]
+    lines = [
+        f"科目：{subject_name}",
+        f"共 {total} 次有复盘记录的考试",
+        f"状态统计：{'、'.join(summary_parts)}",
+        "",
+        "【按考试日期从早到晚，请严格按此顺序解读，不得颠倒】",
+    ]
+
+    for index, (exam, score, statuses) in enumerate(entries, start=1):
+        type_label = _EXAM_TYPE_LABELS.get(exam.exam_type.value, exam.exam_type.value)
+        status_text = "、".join(_REVIEW_STATUS_LABELS.get(s, s.value) for s in statuses)
+        obtained = float(score.obtained_score)
+        total_score = float(score.total_score)
+        ratio = float(score.ratio) * 100
+        lost = total_score - obtained
+        when = "（最近一次）" if index == total else ""
+        line = (
+            f"第{index}次{when} | 日期 {exam.exam_date} | {type_label} | "
+            f"得分 {obtained:g}/{total_score:g}（得分率 {ratio:.1f}%，失分 {lost:g} 分）| "
+            f"复盘状态：{status_text}"
+        )
+        if exam.title:
+            line += f" | 备注：{exam.title}"
+        lines.append(line)
+
     return "\n".join(lines)
 
 
@@ -298,7 +329,7 @@ async def review_insight(
         .all()
     )
     subject_name = data.subject_name.strip()
-    records = _build_review_records_text(exams, subject_name)
+    records = _build_review_insight_context(exams, subject_name)
     if not records:
         raise HTTPException(
             status_code=status.HTTP_400_BAD_REQUEST,