更新v1.4版本，修复了一些已知问题

backend/schemas/admin.py

@@ -91,7 +91,6 @@ class AddAttendanceRequest(BaseModel):
 
 class UpdateAdminRequest(BaseModel):
     """更新管理员请求"""
-    user_id: int = Field(..., gt=0, description="用户ID")
     real_name: str = Field(..., min_length=1, max_length=50, description="真实姓名")
     role_type: str = Field(..., pattern=r'^(班长|学习委员|考勤委员|劳动委员|志愿委员)$', description="角色类型")
 
@@ -109,4 +108,12 @@ class ResetPasswordRequest(BaseModel):
 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=11, pattern=r'^\d{0,11}$', description="家长手机号")
+    parent_phone: Optional[str] = Field(None, max_length=11, pattern=r'^\d{0,11}$', description="家长手机号")
+
+
+class CreateAssignmentRequest(BaseModel):
+    """创建作业请求"""
+    subject_id: int = Field(..., gt=0, description="科目ID")
+    title: str = Field(..., min_length=1, max_length=200, description="作业标题")
+    description: Optional[str] = Field(None, max_length=1000, description="作业描述")
+    deadline: str = Field(..., min_length=1, max_length=20, description="截止日期")