feat: 完成云同步、语音控制与多平台扩展基础架构搭建

本次提交完成了项目核心基础架构升级：
1. 新增动态API中间件与权限控制系统，支持匿名/鉴权接口分离
2. 搭建云同步服务体系，包含认证、任务同步、安全策略等核心模块
3. 实现语音控制全链路，从STT/意图解析到命令执行
4. 新增任务类型、附件实体与相关仓储接口
5. 重构前端配置与代理规则，统一后端端口为5057
6. 新增多平台测试项目与CI脚本优化
7. 完善项目文档与代码注释规范

移除了旧版迁移文件与冗余代理配置，调整项目结构适配跨平台部署需求。

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

@@ -1,5 +1,4 @@
 using Microsoft.EntityFrameworkCore;
-using Hua.Todo.Application.Data;
 using Hua.Todo.Core.Entities;
 using Hua.Todo.Core.Interfaces;
 
@@ -28,7 +27,7 @@ public class TaskRepository : ITaskRepository
     public async Task<List<TaskEntity>> GetAllAsync()
     {
         return await _context.Tasks
-            .Include(t => t.SubTasks)
+            .Include(t => t.SubTasks!)
             .ToListAsync();
     }
 
@@ -37,10 +36,10 @@ 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)
+            .Include(t => t.SubTasks!)
             .FirstOrDefaultAsync(t => t.Id == id);
     }
 
@@ -52,7 +51,7 @@ public class TaskRepository : ITaskRepository
     {
         return await _context.Tasks
             .Where(t => !t.IsCompleted)
-            .OrderByDescending(t => t.CreatedAt)
+            .OrderByDescending(t => t.CreationTime)
             .ToListAsync();
     }
 
@@ -64,7 +63,7 @@ public class TaskRepository : ITaskRepository
     {
         return await _context.Tasks
             .Where(t => t.IsCompleted)
-            .OrderByDescending(t => t.UpdatedAt)
+            .OrderByDescending(t => t.LastModificationTime)
             .ToListAsync();
     }
 
@@ -87,7 +86,7 @@ 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;
         _context.Tasks.Update(taskEntity);
         await _context.SaveChangesAsync();
         return taskEntity;
@@ -98,7 +97,7 @@ public class TaskRepository : ITaskRepository
     /// </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.FindAsync(id);
         if (task != null)
@@ -113,11 +112,35 @@ 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.ParentTaskId == parentTaskId)
-            .OrderByDescending(t => t.CreatedAt)
+            .OrderByDescending(t => t.CreationTime)
             .ToListAsync();
     }
+
+    /// <summary>
+    /// 获取指定用户的任务中最大的数字型 Code。
+    /// </summary>
+    /// <param name="userId">用户 ID。</param>
+    /// <returns>最大数字 Code；若无任务或无可解析 Code 则返回 0。</returns>
+    public async Task<int> GetMaxCodeAsync(Guid userId)
+    {
+        var codes = await _context.Tasks
+            .AsNoTracking()
+            .Where(t => t.UserId == userId)
+            .Select(t => t.Code)
+            .ToListAsync();
+
+        int max = 0;
+        foreach (var code in codes)
+        {
+            if (int.TryParse(code, out var value) && value > max)
+            {
+                max = value;
+            }
+        }
+        return max;
+    }
 }