Fix UriFormatException crash in PowerToys Run when started from extended-length UNC path

src/modules/launcher/Wox.Infrastructure/Image/ImageLoader.cs

@@ -55,13 +55,18 @@ public static bool IsValidPngSignature(string filePath)
             return fs.Read(buffer, 0, buffer.Length) == buffer.Length && pngSignature.SequenceEqual(buffer);
         }
 
+        internal static string GetNormalizedPath(string path)
+        {
+            return PathNormalization.NormalizePath(path);
+        }
+
         public static void Initialize()
         {
             _hashGenerator = new ImageHashGenerator();
 
             foreach (var icon in new[] { Constant.ErrorIcon, Constant.LightThemedErrorIcon })
             {
-                var uri = new Uri(icon);
+                var uri = new Uri(GetNormalizedPath(icon));
 
                 try
                 {
@@ -298,7 +303,7 @@ private static BitmapImage LoadFullImage(string path)
             BitmapImage image = new BitmapImage();
             image.BeginInit();
             image.CacheOption = BitmapCacheOption.OnLoad;
-            image.UriSource = new Uri(path);
+            image.UriSource = new Uri(GetNormalizedPath(path));
             image.EndInit();
             return image;
         }

src/modules/launcher/Wox.Plugin/Constant.cs

@@ -64,7 +64,7 @@ public static string DetermineDataDirectory()
         public static readonly string Version = FileVersionInfo.GetVersionInfo(Assembly.Location.NonNull()).ProductVersion;
 
         public static readonly int ThumbnailSize = 64;
-        public static readonly string ErrorIcon = Path.Combine(ProgramDirectory, "Assets", "PowerLauncher", "app_error.dark.png");
-        public static readonly string LightThemedErrorIcon = Path.Combine(ProgramDirectory, "Assets", "PowerLauncher", "app_error.light.png");
+        public static readonly string ErrorIcon = PathNormalization.NormalizePath(Path.Combine(ProgramDirectory, "Assets", "PowerLauncher", "app_error.dark.png"));
+        public static readonly string LightThemedErrorIcon = PathNormalization.NormalizePath(Path.Combine(ProgramDirectory, "Assets", "PowerLauncher", "app_error.light.png"));
     }
 }

src/modules/launcher/Wox.Plugin/PathNormalization.cs

@@ -0,0 +1,29 @@
+// Copyright (c) Microsoft Corporation
+// The Microsoft Corporation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System;
+
+namespace Wox.Plugin
+{
+    public static class PathNormalization
+    {
+        private const string UncPrefix = @"\\?\UNC\";
+        private const string ExtendedPrefix = @"\\?\";
+
+        public static string NormalizePath(string path)
+        {
+            if (path.StartsWith(UncPrefix, StringComparison.OrdinalIgnoreCase))
+            {
+                return @"\\" + path.Substring(UncPrefix.Length);
+            }
+
+            if (path.StartsWith(ExtendedPrefix, StringComparison.OrdinalIgnoreCase))
+            {
+                return path.Substring(ExtendedPrefix.Length);
+            }
+
+            return path;
+        }
+    }
+}

src/modules/launcher/Wox.Test/ImageLoaderTest.cs

@@ -0,0 +1,41 @@
+// Copyright (c) Microsoft Corporation
+// The Microsoft Corporation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+using Wox.Plugin;
+
+namespace Wox.Test
+{
+    [TestClass]
+    public class ImageLoaderTest
+    {
+        [DataTestMethod]
+
+        // Regular Windows paths should be returned unchanged
+        [DataRow(@"C:\path\to\file.png", @"C:\path\to\file.png")]
+        [DataRow(@"C:\Program Files\PowerToys\Assets\PowerLauncher\app_error.dark.png", @"C:\Program Files\PowerToys\Assets\PowerLauncher\app_error.dark.png")]
+
+        // UNC paths should be returned unchanged
+        [DataRow(@"\\server\share\path\file.png", @"\\server\share\path\file.png")]
+
+        // Extended-length local paths (\\?\C:\...) should have the \\?\ prefix stripped
+        [DataRow(@"\\?\C:\path\to\file.png", @"C:\path\to\file.png")]
+        [DataRow(@"\\?\C:\Program Files\PowerToys\Assets\app_error.dark.png", @"C:\Program Files\PowerToys\Assets\app_error.dark.png")]
+
+        // Extended-length UNC paths (\\?\UNC\server\...) should be converted to \\server\...
+        [DataRow(@"\\?\UNC\server\share\path\file.png", @"\\server\share\path\file.png")]
+        [DataRow(@"\\?\UNC\TH50\TH50_c\Program Files\PowerToys\Assets\PowerLauncher\app_error.dark.png", @"\\TH50\TH50_c\Program Files\PowerToys\Assets\PowerLauncher\app_error.dark.png")]
+
+        // Case-insensitive matching for the prefix
+        [DataRow(@"\\?\unc\server\share\path\file.png", @"\\server\share\path\file.png")]
+        public void GetNormalizedPath_ShouldStripExtendedLengthPrefix(string input, string expected)
+        {
+            // Act
+            string result = PathNormalization.NormalizePath(input);
+
+            // Assert
+            Assert.AreEqual(expected, result);
+        }
+    }
+}