重构作业结构：优化实体模型、DTO映射和前端界面

- 重构AppMainStruct、AssignmentQuestion、Question等实体模型
- 更新相关DTO以匹配新的数据结构
- 优化前端页面布局和组件
- 添加全局信息和笔记功能相关代码
- 更新数据库迁移和程序配置

Entities/DTO/AssignmentQuestionDto.cs

@@ -17,6 +17,8 @@ namespace Entities.DTO
 		public float Score { get; set; } = 0;
 		public string Sequence { get; set; } = string.Empty;
 		public bool BCorrect { get; set; } = true;
+		public QuestionType Type { get; set; } = QuestionType.Unknown;
+		public string QType { get; set; } = string.Empty;
 
 		public Layout Layout { get; set; } = Layout.horizontal;
 		public AssignmentStructType StructType { get; set; } = AssignmentStructType.Question;