重构项目结构，移除Assignment相关功能，优化Submission模块

TechHelper.Client/Pages/Author/Login.razor.cs

@@ -1,7 +1,7 @@
 using TechHelper.Client.HttpRepository;
-using Entities.DTO;
 using Microsoft.AspNetCore.Components;
 using Microsoft.AspNetCore.WebUtilities;
+using Entities.DTO;
 
 namespace TechHelper.Client.Pages.Author
 {

TechHelper.Client/Pages/Author/Registration.razor

@@ -33,7 +33,7 @@
 							<MudPaper Class="d-flex flex-column flex-grow-1 rounded-xl px-5 justify-content-center pt-15 w-100 " Elevation="0" Outlined="false">
 								<MudText Typo="Typo.h5"> <b>注册账户</b> </MudText>
 								<MudTextField Label="Name" HelperText="Max. 8 characters"
-											  @bind-Value="_userForRegistration.Name" For="@(() => _userForRegistration.Email)" />
+											  @bind-Value="_userForRegistration.DisplayName" For="@(() => _userForRegistration.Email)" />
 								<MudTextField Label="Email" Class="mt-3"
 											  @bind-Value="_userForRegistration.Email" For="@(() => _userForRegistration.Email)" />
 								<MudTextField Label="Password" HelperText="Choose a strong password" Class="mt-3"

TechHelper.Client/Pages/Author/Registration.razor.cs

@@ -1,11 +1,11 @@
 using TechHelper.Client.HttpRepository;
-using Entities.DTO;
 using Microsoft.AspNetCore.Components;
 using MudBlazor;
 using System.Text.RegularExpressions;
 using TechHelper.Features;
 using Entities.Contracts;
 using TechHelper.Client.Services;
+using Entities.DTO;
 
 namespace TechHelper.Client.Pages.Author
 {