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/Controllers/NoteController.cs

@@ -0,0 +1,91 @@
+using Entities.DTO;
+using Microsoft.AspNetCore.Http;
+using Microsoft.AspNetCore.Mvc;
+using TechHelper.Services;
+
+namespace TechHelper.Server.Controllers
+{
+	[Route("api/note")]
+	[ApiController]
+	public class NoteController : ControllerBase
+	{
+		private readonly INoteService _noteService;
+
+		// 通过依赖注入获取 NoteService
+		public NoteController(INoteService noteService)
+		{
+			_noteService = noteService;
+		}
+
+		/// <summary>
+		/// 获取所有全局数据。
+		/// GET: api/Note
+		/// </summary>
+		[HttpGet]
+		public async Task<IActionResult> GetAll([FromQuery] QueryParameter query)
+		{
+			var response = await _noteService.GetAllAsync(query);
+			return Ok(response);
+		}
+
+		/// <summary>
+		/// 根据 ID 获取单个全局数据。
+		/// GET: api/Note/{id}
+		/// </summary>
+		[HttpGet("{id}")]
+		public async Task<IActionResult> Get(byte id)
+		{
+			var response = await _noteService.GetAsync(id);
+			if (!response.Status)
+			{
+				return NotFound(response);
+			}
+			return Ok(response);
+		}
+
+		/// <summary>
+		/// 添加新的全局数据。
+		/// POST: api/Note
+		/// </summary>
+		[HttpPost]
+		public async Task<IActionResult> Add([FromBody] GlobalDto model)
+		{
+			var response = await _noteService.AddAsync(model);
+			if (!response.Status)
+			{
+				return BadRequest(response);
+			}
+			return Ok(response);
+		}
+
+		/// <summary>
+		/// 更新已存在的全局数据。
+		/// PUT: api/Note
+		/// </summary>
+		[HttpPut]
+		public async Task<IActionResult> Update([FromBody] GlobalDto model)
+		{
+			var response = await _noteService.UpdateAsync(model);
+			if (!response.Status)
+			{
+				return NotFound(response);
+			}
+			return Ok(response);
+		}
+
+		/// <summary>
+		/// 根据 ID 删除全局数据。
+		/// DELETE: api/Note/{id}
+		/// </summary>
+		[HttpDelete("{id}")]
+		public async Task<IActionResult> Delete(byte id)
+		{
+			var response = await _noteService.DeleteAsync(id);
+			if (!response.Status)
+			{
+				return NotFound(response);
+			}
+			return Ok(response);
+		}
+	}
+}