Quote and prefix long paths when copying to clipboard

Paths copied to the clipboard are now quoted, and long paths (>= 260 characters) are prefixed with \\?\ to ensure compatibility. This improves reliability when handling long file paths.

Author: emako

QuickLook.Plugin/QuickLook.Plugin.HtmlViewer/Helper.cs

@@ -48,7 +48,7 @@ public static Uri FilePathToFileUrl(string filePath)
                 uri.Append('/');
             else
                 uri.Append($"%{(int)v:X2}");
-        if (uri.Length >= 2 && uri[0] == '/' && uri[1] == '/') // UNC path
+        if (uri.Length >= 2 && uri[0] == '/' && uri[1] == '/') // UNC path - Universal Naming Convention
             uri.Insert(0, "file:");
         else
             uri.Insert(0, "file:///");

QuickLook/ViewerWindow.xaml.cs

@@ -115,7 +115,7 @@ internal ViewerWindow()
         {
             try
             {
-                Clipboard.SetText(_path);
+                Clipboard.SetText($"\"{(_path.Length >= 260 ? @"\\?\" + _path : _path)}\"");
                 Toast.Success(TranslationHelper.Get("InfoPanelMoreItem_CopySucc"));
             }
             catch (Exception e)