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。

Hua.Todo.slnx

@@ -5,14 +5,26 @@
     <Platform Name="x64" />
     <Platform Name="x86" />
   </Configurations>
-  <Folder Name="/src/">
-    <Project Path="src/Hua.Todo.Application/Hua.Todo.Application.csproj">
-      <Build Solution="Debug|*" Project="true" />
-    </Project>
+  <Folder Name="/src/" />
+  <Folder Name="/src/Domain/">
+    <Project Path="src/Hua.Todo.Application/Hua.Todo.Application.csproj" />
     <Project Path="src/Hua.Todo.Core/Hua.Todo.Core.csproj" />
+  </Folder>
+  <Folder Name="/src/Host/">
+    <Project Path="src/Hua.Todo.Avalonia/Hua.Todo.Avalonia.csproj" />
     <Project Path="src/Hua.Todo.Host/Hua.Todo.Host.csproj" />
     <Project Path="src/Hua.Todo.Maui/Hua.Todo.Maui.csproj">
       <Build Solution="Debug|*" Project="false" />
     </Project>
   </Folder>
+  <Folder Name="/src/HttpApi/">
+    <Project Path="src/Hua.Todo.HttpApi/Hua.Todo.HttpApi.csproj" />
+    <Project Path="src/Hua.Todo.HttpApi.Android/Hua.Todo.HttpApi.Android.csproj" />
+    <Project Path="src/Hua.Todo.HttpApi.AspNetCore/Hua.Todo.HttpApi.AspNetCore.csproj" />
+  </Folder>
+  <Folder Name="/test/">
+    <Project Path="test/Hua.Todo.Host.Tests/Hua.Todo.Host.Tests.csproj" />
+    <Project Path="test/Hua.Todo.Maui.Tests/Hua.Todo.Maui.Tests.csproj" />
+    <Project Path="test/Hua.Todo.Avalonia.Tests/Hua.Todo.Avalonia.Tests.csproj" />
+  </Folder>
 </Solution>