feat: 实现v1.2.0云同步与实体重构核心功能

1.  重构用户与任务实体：UserEntity实现IUser<Guid>，TaskEntity继承ABP风格FullAuditedEntityWithUser，主键从int改为Guid
2.  新增云同步代理系统：嵌入式WebServer支持CloudSyncProxy转发云同步请求，新增配置API与持久化
3.  完善前端适配：新增Guid工具函数，更新任务类型定义与API交互逻辑，调整云同步设置弹窗适配本地代理
4.  文档与配置优化：更新文档结构，新增部署文档、版本记录，统一各项目配置项
5.  补充测试与迁移：新增单元测试，更新EF Core数据库迁移快照

src/Hua.Todo.Application/Repositories/TaskRepository.cs

@@ -22,14 +22,17 @@ public class TaskRepository : ITaskRepository
     }
 
     /// <summary>
-    /// 获取所有任务。
+    /// 获取所有任务（本地用户），平面加载以支持任意深度树构建。
+    /// 不再使用 Include(t => t.SubTasks) 因为 EF Core 无法递归加载未知深度的子任务；
+    /// 树的构建交由 <see cref="TaskService.GetAllTasksAsync"/> 通过 parentTaskId 在内存中完成。
     /// </summary>
-    /// <returns>包含所有任务实体的列表。</returns>
+    /// <returns>包含所有任务实体的平面列表。</returns>
     public async Task<List<TaskEntity>> GetAllAsync()
     {
         return await _context.Tasks
+            .AsNoTracking()
             .Where(t => t.UserId == TodoUserIds.LocalUserId)
-            .Include(t => t.SubTasks)
+            .OrderByDescending(t => t.CreationTime)
             .ToListAsync();
     }
 
@@ -38,7 +41,7 @@ public class TaskRepository : ITaskRepository
     /// </summary>
     /// <param name="id">任务 ID。</param>
     /// <returns>匹配的任务实体；如果不存在则返回 null。</returns>
-    public async Task<TaskEntity?> GetByIdAsync(int id)
+    public async Task<TaskEntity?> GetByIdAsync(Guid id)
     {
         return await _context.Tasks
             .Include(t => t.SubTasks)
@@ -53,7 +56,7 @@ public class TaskRepository : ITaskRepository
     {
         return await _context.Tasks
             .Where(t => t.UserId == TodoUserIds.LocalUserId && !t.IsCompleted)
-            .OrderByDescending(t => t.CreatedAt)
+            .OrderByDescending(t => t.CreationTime)
             .ToListAsync();
     }
 
@@ -65,7 +68,7 @@ public class TaskRepository : ITaskRepository
     {
         return await _context.Tasks
             .Where(t => t.UserId == TodoUserIds.LocalUserId && t.IsCompleted)
-            .OrderByDescending(t => t.UpdatedAt)
+            .OrderByDescending(t => t.LastModificationTime)
             .ToListAsync();
     }
 
@@ -77,6 +80,12 @@ public class TaskRepository : ITaskRepository
     public async Task<TaskEntity> AddAsync(TaskEntity taskEntity)
     {
         taskEntity.UserId = TodoUserIds.LocalUserId;
+        if (taskEntity.Id == Guid.Empty)
+        {
+            taskEntity.Id = Guid.NewGuid();
+        }
+        taskEntity.CreationTime = DateTime.UtcNow;
+        taskEntity.CreatorId = taskEntity.UserId;
         _context.Tasks.Add(taskEntity);
         await _context.SaveChangesAsync();
         return taskEntity;
@@ -89,18 +98,18 @@ public class TaskRepository : ITaskRepository
     /// <returns>更新后的任务实体。</returns>
     public async Task<TaskEntity> UpdateAsync(TaskEntity taskEntity)
     {
-        taskEntity.UpdatedAt = DateTime.UtcNow;
+        taskEntity.LastModificationTime = DateTime.UtcNow;
+        taskEntity.LastModifierId = taskEntity.UserId;
         _context.Tasks.Update(taskEntity);
         await _context.SaveChangesAsync();
         return taskEntity;
     }
 
     /// <summary>
-    /// 根据 ID 删除任务。
+    /// 根据 ID 删除任务（物理删除）。
     /// </summary>
     /// <param name="id">要删除的任务 ID。</param>
-    /// <returns>表示删除操作的任务。</returns>
-    public async Task DeleteAsync(int id)
+    public async Task DeleteAsync(Guid id)
     {
         var task = await _context.Tasks.FirstOrDefaultAsync(t => t.Id == id && t.UserId == TodoUserIds.LocalUserId);
         if (task != null)
@@ -115,11 +124,11 @@ public class TaskRepository : ITaskRepository
     /// </summary>
     /// <param name="parentTaskId">父任务 ID。</param>
     /// <returns>子任务实体的列表。</returns>
-    public async Task<List<TaskEntity>> GetSubTasksAsync(int parentTaskId)
+    public async Task<List<TaskEntity>> GetSubTasksAsync(Guid parentTaskId)
     {
         return await _context.Tasks
             .Where(t => t.UserId == TodoUserIds.LocalUserId && t.ParentTaskId == parentTaskId)
-            .OrderByDescending(t => t.CreatedAt)
+            .OrderByDescending(t => t.CreationTime)
             .ToListAsync();
     }
-}
+}