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

TechHelper.Server/Services/INoteService.cs

@@ -0,0 +1,13 @@
+using Entities.Contracts;
+using Entities.DTO;
+using System.Net;
+
+namespace TechHelper.Services
+{
+	
+
+	public interface INoteService : IBaseService<GlobalDto, byte>
+	{
+
+	}
+}

TechHelper.Server/Services/NoteService.cs

@@ -0,0 +1,107 @@
+using AutoMapper;
+using Entities.Contracts;
+using Entities.DTO;
+using Microsoft.AspNetCore.Identity;
+using SharedDATA.Api;
+using System.Net;
+
+namespace TechHelper.Services
+{
+	public class NoteService : INoteService
+	{
+		private readonly IUnitOfWork _work;
+		private readonly IMapper _mapper;
+
+		public NoteService(IUnitOfWork work)
+		{
+			_work = work;
+		}
+
+		public async Task<ApiResponse> AddAsync(GlobalDto model)
+		{
+			try
+			{
+				var globalEntity = new Global
+				{
+					Area = model.SubjectArea,
+					Info = model.Data
+				};
+
+				await _work.GetRepository<Global>().InsertAsync(globalEntity);
+				await _work.SaveChangesAsync();
+
+				return ApiResponse.Success("数据已成功添加。");
+			}
+			catch (Exception ex)
+			{
+				return ApiResponse.Error($"添加数据时发生错误: {ex.Message}");
+			}
+		}
+
+		public async Task<ApiResponse> DeleteAsync(byte id)
+		{
+			var globalRepo = _work.GetRepository<Global>();
+			var globalEntity = await globalRepo.GetFirstOrDefaultAsync(predicate: x => x.Area == (SubjectAreaEnum)id);
+
+			if (globalEntity == null)
+			{
+				return ApiResponse.Error("未找到要删除的数据。");
+			}
+
+			globalRepo.Delete(globalEntity);
+			await _work.SaveChangesAsync();
+
+			return ApiResponse.Success("数据已成功删除。");
+		}
+
+		public async Task<ApiResponse> GetAllAsync(QueryParameter query)
+		{
+			var repository = _work.GetRepository<Global>();
+			// 获取所有实体，并将其 Info 属性作为结果返回
+			var entities = await repository.GetAllAsync();
+
+			// 直接返回字符串列表
+			var resultData = entities.Select(e => e.Info).ToList();
+
+			return ApiResponse.Success("数据已成功检索。", resultData);
+		}
+
+		public async Task<ApiResponse> GetAsync(byte id)
+		{
+			var globalEntity = await _work.GetRepository<Global>().GetFirstOrDefaultAsync(predicate: x => x.Area == (SubjectAreaEnum)id);
+
+			if (globalEntity == null)
+			{
+				return ApiResponse.Error("未找到数据。");
+			}
+
+			// 直接返回 Info 字符串
+			return ApiResponse.Success("数据已成功检索。", globalEntity.Info);
+		}
+
+		public async Task<ApiResponse> UpdateAsync(GlobalDto model)
+		{
+			try
+			{
+				var repository = _work.GetRepository<Global>();
+				var existingEntity = await repository.GetFirstOrDefaultAsync(predicate: x => x.Area == (SubjectAreaEnum)model.SubjectArea);
+
+				if (existingEntity == null)
+				{
+					return ApiResponse.Error("未找到要更新的数据。");
+				}
+
+				// 直接将传入的字符串赋值给 Info 属性
+				existingEntity.Info = model.Data;
+				repository.Update(existingEntity);
+				await _work.SaveChangesAsync();
+
+				return ApiResponse.Success("数据已成功更新。");
+			}
+			catch (Exception ex)
+			{
+				return ApiResponse.Error($"更新数据时发生错误: {ex.Message}");
+			}
+		}
+	}
+}