升级测试依赖与 AgentExpansion 框架调整

- 升级 ClientTest、ServerTest、Stardust.Tests 的 Microsoft.NET.Test.Sdk 和 xunit.runner.visualstudio 依赖，提升兼容性与新特性支持
- ServerTest 升级 Microsoft.AspNetCore.TestHost 至 10.0.11
- TestA、TestB、Stardust、Test 升级 NewLife.Core 至 11.18.2026.817-beta0647 预览版
- AgentExpansion 项目目标框架调整为 net45 和 netstandard2.0，输出目录改为 Bin\Agent
- SSH.NET 依赖：net45 保持 2020.0.2，其余升级至 2026.0.0
- 移除 AgentExpansionService.cs 的 RunOnce 方法及 Program.cs，删除命令行入口相关代码

diff --git a/ClientTest/ClientTest.csproj b/ClientTest/ClientTest.csproj
index 740f934..467117c 100644
--- a/ClientTest/ClientTest.csproj
+++ b/ClientTest/ClientTest.csproj
@@ -26,11 +26,11 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.8.1" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.9.0" />
     <PackageReference Include="NewLife.Redis" Version="6.6.2026.801" />
     <PackageReference Include="NewLife.UnitTest" Version="1.1.2026.102" />
     <PackageReference Include="xunit" Version="2.9.3" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="3.1.5">
+    <PackageReference Include="xunit.runner.visualstudio" Version="4.0.0">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>

diff --git a/Plugins/AgentExpansion/AgentExpansion.csproj b/Plugins/AgentExpansion/AgentExpansion.csproj
index 871ad32..d6f092e 100644
--- a/Plugins/AgentExpansion/AgentExpansion.csproj
+++ b/Plugins/AgentExpansion/AgentExpansion.csproj
@@ -1,8 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <OutputType>Exe</OutputType>
-    <TargetFrameworks>net45;netcoreapp3.1;net5.0;net6.0;net7.0;net8.0;net9.0;net10.0</TargetFrameworks>
+    <TargetFrameworks>net45;netstandard2.0</TargetFrameworks>
     <AssemblyTitle>代理扩展</AssemblyTitle>
     <Description>星尘代理局域网扩展，探测节点并自动安装StarAgent</Description>
     <Company>新生命开发团队</Company>
@@ -13,7 +12,7 @@
     <FileVersion>$(Version)</FileVersion>
     <AssemblyVersion>$(VersionPrefix).*</AssemblyVersion>
     <Deterministic>false</Deterministic>
-    <OutputPath>..\..\Bin</OutputPath>
+    <OutputPath>..\..\Bin\Agent</OutputPath>
     <ImplicitUsings>enable</ImplicitUsings>
     <LangVersion>latest</LangVersion>
     <IsPackable>False</IsPackable>
@@ -24,12 +23,14 @@
     <ProjectReference Include="..\..\Stardust\Stardust.csproj" />
   </ItemGroup>
 
+  <!-- SSH.NET 2023.0.0 起移除 net40/net45 目标，2020.0.2 是最后一个支持 net45 的版本 -->
   <ItemGroup Condition="'$(TargetFramework)' == 'net45'">
     <PackageReference Include="SSH.NET" Version="2020.0.2" />
   </ItemGroup>
 
+  <!-- 最新版 2026.0.0 支持 net462/netstandard2.0/net8+，netstandard2.0 资产覆盖 net461+ 及全部新运行时 -->
   <ItemGroup Condition="'$(TargetFramework)' != 'net45'">
-    <PackageReference Include="SSH.NET" Version="2025.1.0" />
+    <PackageReference Include="SSH.NET" Version="2026.0.0" />
   </ItemGroup>
 
   <ItemGroup>

diff --git a/Plugins/AgentExpansion/AgentExpansionService.cs b/Plugins/AgentExpansion/AgentExpansionService.cs
index ba748a1..ca0e645 100644
--- a/Plugins/AgentExpansion/AgentExpansionService.cs
+++ b/Plugins/AgentExpansion/AgentExpansionService.cs
@@ -53,8 +53,6 @@ internal sealed class AgentExpansionService
         AgentExpansionSetting.Provider!.Changed -= OnSettingChanged;
     }
 
-    public void RunOnce() => ScanAsync(CancellationToken.None).GetAwaiter().GetResult();
-
     private void OnSettingChanged(Object? sender, EventArgs eventArgs)
     {
         _timer?.SetNext(-1);

diff --git a/Samples/TestA/TestA.csproj b/Samples/TestA/TestA.csproj
index d5f95af..8646515 100644
--- a/Samples/TestA/TestA.csproj
+++ b/Samples/TestA/TestA.csproj
@@ -18,7 +18,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="NewLife.Core" Version="11.18.2026.801" />
+    <PackageReference Include="NewLife.Core" Version="11.18.2026.817-beta0647" />
   </ItemGroup>
 
 </Project>

diff --git a/Samples/TestB/TestB.csproj b/Samples/TestB/TestB.csproj
index 0b354ce..c8403f5 100644
--- a/Samples/TestB/TestB.csproj
+++ b/Samples/TestB/TestB.csproj
@@ -18,7 +18,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="NewLife.Core" Version="11.18.2026.801" />
+    <PackageReference Include="NewLife.Core" Version="11.18.2026.817-beta0647" />
   </ItemGroup>
 
 </Project>

diff --git a/Stardust.ServerTests/ServerTest.csproj b/Stardust.ServerTests/ServerTest.csproj
index 3e4b280..4143c95 100644
--- a/Stardust.ServerTests/ServerTest.csproj
+++ b/Stardust.ServerTests/ServerTest.csproj
@@ -32,11 +32,11 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.AspNetCore.TestHost" Version="10.0.10" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.8.1" />
+    <PackageReference Include="Microsoft.AspNetCore.TestHost" Version="10.0.11" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.9.0" />
     <PackageReference Include="Moq" Version="4.20.72" />
     <PackageReference Include="xunit" Version="2.9.3" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="3.1.5">
+    <PackageReference Include="xunit.runner.visualstudio" Version="4.0.0">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>

diff --git a/Stardust.Tests/Stardust.Tests.csproj b/Stardust.Tests/Stardust.Tests.csproj
index 75b38cf..fb63dfa 100644
--- a/Stardust.Tests/Stardust.Tests.csproj
+++ b/Stardust.Tests/Stardust.Tests.csproj
@@ -18,10 +18,10 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.8.1" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.9.0" />
     <PackageReference Include="Moq" Version="4.20.72" />
     <PackageReference Include="xunit" Version="2.9.3" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="3.1.5">
+    <PackageReference Include="xunit.runner.visualstudio" Version="4.0.0">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>

diff --git a/Stardust/Stardust.csproj b/Stardust/Stardust.csproj
index 84d061e..a91351c 100644
--- a/Stardust/Stardust.csproj
+++ b/Stardust/Stardust.csproj
@@ -77,7 +77,7 @@
     <PackageReference Include="NewLife.Remoting" Version="3.9.2026.801" />
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Include="NewLife.Core" Version="11.18.2026.801" />
+    <PackageReference Include="NewLife.Core" Version="11.18.2026.817-beta0647" />
   </ItemGroup>
 
 </Project>

diff --git a/Test/Test.csproj b/Test/Test.csproj
index c04f338..0d02afd 100644
--- a/Test/Test.csproj
+++ b/Test/Test.csproj
@@ -33,7 +33,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="NewLife.Core" Version="11.18.2026.801" />
+    <PackageReference Include="NewLife.Core" Version="11.18.2026.817-beta0647" />
   </ItemGroup>
 
   <ItemGroup>