perf: 清空缓存移动到界面设置

src/MaaWpfGui/ViewModels/UserControl/Settings/IssueReportUserControlModel.cs

@@ -76,43 +76,6 @@ public class IssueReportUserControlModel : PropertyChangedBase
         }
     }
 
-    /// <summary>
-    /// 清空缓存 包括cache目录和debug目录
-    /// </summary>
-    public void ClearCache()
-    {
-        try
-        {
-            var clearedDirs = new List<string>();
-
-            if (Directory.Exists(PathsHelper.CacheDir))
-            {
-                Directory.Delete(PathsHelper.CacheDir, recursive: true);
-                clearedDirs.Add("cache");
-            }
-
-            if (Directory.Exists(PathsHelper.DebugDir))
-            {
-                DeleteDirectoryContentsExcept(PathsHelper.DebugDir, ["asst.log", "gui.log"]);
-                clearedDirs.Add("debug");
-            }
-
-            if (clearedDirs.Count > 0)
-            {
-                ShowGrowl(LocalizationHelper.GetString("ClearCacheSuccessful"));
-            }
-            else
-            {
-                ShowGrowl(LocalizationHelper.GetString("ClearCacheAlreadyEmpty"));
-            }
-        }
-        catch (Exception ex)
-        {
-            ShowGrowl($"{LocalizationHelper.GetString("ClearCacheException")}\n{ex.Message}");
-            Log.Error(ex, "Failed to clear cache");
-        }
-    }
-
     /// <summary>
     /// 生成日志压缩包
     /// </summary>
@@ -245,28 +208,6 @@ public class IssueReportUserControlModel : PropertyChangedBase
         }
     }
 
-    /// <summary>
-    /// 删除目录下的所有文件和子目录，排除指定的文件名。
-    /// </summary>
-    private static void DeleteDirectoryContentsExcept(string dir, IEnumerable<string> excludeFileNames)
-    {
-        var excludeSet = excludeFileNames.ToHashSet(StringComparer.OrdinalIgnoreCase);
-        foreach (var file in Directory.EnumerateFiles(dir))
-        {
-            if (excludeSet.Contains(Path.GetFileName(file)))
-            {
-                continue;
-            }
-
-            File.Delete(file);
-        }
-
-        foreach (var subDir in Directory.EnumerateDirectories(dir))
-        {
-            Directory.Delete(subDir, recursive: true);
-        }
-    }
-
     /// <summary>
     /// 从 sourceDir 复制文件到 targetDir，支持过滤。
     /// </summary>