feat: 增加学生信息管理功能，优化操行分历史记录展示并更新使用文档

backend/services/conduct_service.py

@@ -159,7 +159,8 @@ class ConductService:
         page: int = 1,
         page_size: int = 20,
         start_date: Optional[str] = None,
-        end_date: Optional[str] = None
+        end_date: Optional[str] = None,
+        grouped: bool = False
     ) -> Dict[str, Any]:
         """获取历史记录"""
         # 空字符串转为None
@@ -173,21 +174,43 @@ class ConductService:
         
         # 班主任/班长/志愿委员可查看全班
         if role in ["班主任", "班长", "志愿委员"]:
+            if grouped:
+                return await ConductModel.get_grouped_records(
+                    student_id=student_id,
+                    start_date=start_date,
+                    end_date=end_date,
+                    page=page,
+                    page_size=page_size
+                )
+            
             records = await ConductModel.get_all_records(
                 limit=page_size,
                 offset=offset,
                 start_date=start_date,
-                end_date=end_date
+                end_date=end_date,
+                student_id=student_id
             )
             
             # 获取总数
             from utils.database import execute_one
-            count_sql = """
+            count_conditions = ["cr.is_revoked = 0"]
+            count_params = []
+            if student_id:
+                count_conditions.append("cr.student_id = %s")
+                count_params.append(student_id)
+            if start_date:
+                count_conditions.append("DATE(cr.created_at) >= %s")
+                count_params.append(start_date)
+            if end_date:
+                count_conditions.append("DATE(cr.created_at) <= %s")
+                count_params.append(end_date)
+            count_where = " AND ".join(count_conditions)
+            count_sql = f"""
                 SELECT COUNT(*) as total FROM conduct_records cr
                 JOIN students s ON cr.student_id = s.student_id
-                WHERE cr.is_revoked = 0
+                WHERE {count_where}
             """
-            total_result = await execute_one(count_sql)
+            total_result = await execute_one(count_sql, tuple(count_params))
             total = total_result["total"] if total_result else 0
             
         elif student_id: