fix. 插件安装修复

LanMountainDesktop.Tests/PluginRuntimeDataPathTests.cs

@@ -0,0 +1,40 @@
+using LanMountainDesktop.Services;
+using Xunit;
+
+namespace LanMountainDesktop.Tests;
+
+public sealed class PluginRuntimeDataPathTests : IDisposable
+{
+    private readonly string _dataRoot = Path.Combine(
+        Path.GetTempPath(),
+        "LanMountainDesktop.Tests",
+        nameof(PluginRuntimeDataPathTests),
+        Guid.NewGuid().ToString("N"));
+
+    [Fact]
+    public void PluginRuntime_UsesHostDataRootForPluginsAndMarketData()
+    {
+        AppDataPathProvider.Initialize(["--data-root", _dataRoot]);
+
+        using var runtime = new PluginRuntimeService();
+
+        Assert.Equal(
+            Path.Combine(Path.GetFullPath(_dataRoot), "Extensions", "Plugins"),
+            runtime.PluginsDirectory);
+    }
+
+    public void Dispose()
+    {
+        AppDataPathProvider.ResetForTests();
+        try
+        {
+            if (Directory.Exists(_dataRoot))
+            {
+                Directory.Delete(_dataRoot, recursive: true);
+            }
+        }
+        catch
+        {
+        }
+    }
+}