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.Client/Pages/Exam/QuestionCard/QuestionEdit.razor

@@ -1,10 +1,29 @@
 @using Entities.DTO
+@using Entities.Contracts
+@using Newtonsoft.Json
 @using TechHelper.Client.Exam
 
 
 <MudPaper Elevation="1" Class="ma-4 pa-5 rounded-xl">
 	@* <MudText>@Question.Id</MudText> *@
 	<MudText Class="mt-3" Typo="Typo.button"><b>问题属性</b></MudText>
+
+	<MudChipSet T="string" SelectedValue="@Question.QType" CheckMark SelectionMode="SelectionMode.SingleSelection" SelectedValueChanged="HandleQTSelectedValueChanged">
+
+		@foreach (var item in QuestionTypes)
+		{
+			var qt = item;
+			@* Style = "@($"background - color:{ item.Value.Color} ")"*@
+
+			<MudChip Style="@(qt.Key == Question.QType ?
+										 		   $"background-color:#ffffff; color:{item.Value.Color}" :
+												   $"background-color:{item.Value.Color}; color:#ffffff")"
+				 Value="@item.Key">
+			@item.Value.DisplayName
+		</MudChip>
+				}
+	</MudChipSet>
+	<MudRating SelectedValue="@(diffi)" SelectedValueChanged="HandleSelected" Size="Size.Small" />
 	<MudTextField @bind-Value="Question.Title" Label="Title" Variant="Variant.Text" Margin="Margin.Dense" AutoGrow="true" />
 	<MudTextField @bind-Value="Question.Answer" Label="Answer" Variant="Variant.Text" Adornment="Adornment.End" AdornmentText="." Margin="Margin.Dense" AutoGrow="true" />
 	<MudTextField @bind-Value="Question.Options" Label="Options" Variant="Variant.Text" Adornment="Adornment.End" AdornmentText="." Margin="Margin.Dense" AutoGrow="true" />
@@ -15,4 +34,35 @@
 @code {
 	[Parameter]
 	public QuestionDto Question { get; set; } = new QuestionDto();
+	public int diffi = 0;
+	Dictionary<string, QuestionDisplayTypeData> QuestionTypes = new Dictionary<string, QuestionDisplayTypeData>();
+
+	[Inject]
+	private ILocalStorageService LocalStorageService { get; set; }
+	protected override void OnInitialized()
+	{
+		base.OnInitialized();
+
+		var cs = LocalStorageService.GetItem<string>("GlobalInfo");
+		var GlobalInfo = JsonConvert.DeserializeObject<Dictionary<string, QuestionDisplayTypeData>>(cs);
+		if (GlobalInfo != null)
+		{
+			QuestionTypes = GlobalInfo;
+		}
+	}
+	private void HandleSelectedValueChanged(QuestionType type)
+	{
+		Question.Type = type;
+	}
+
+	private void HandleSelected(int num)
+	{
+		Question.DifficultyLevel = (DifficultyLevel)num;
+	}
+
+	private void HandleQTSelectedValueChanged(string type)
+	{
+		Question.QType = type;
+		StateHasChanged();
+	}
 }