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/schemas/admin.py

@@ -102,4 +102,10 @@ class DeleteAdminRequest(BaseModel):
 
 class ResetPasswordRequest(BaseModel):
     """重置密码请求"""
-    new_password: str = Field(..., min_length=6, max_length=50, description="新密码")
+    new_password: str = Field(..., min_length=6, max_length=50, description="新密码")
+
+
+class UpdateStudentRequest(BaseModel):
+    """更新学生请求"""
+    name: Optional[str] = Field(None, min_length=1, max_length=50, description="姓名")
+    parent_phone: Optional[str] = Field(None, max_length=20, description="家长手机号")