Fix Win10 native chat icon fallback

src/OpenClaw.SetupEngine.UI/IconFonts.cs

@@ -0,0 +1,10 @@
+using Microsoft.UI.Xaml;
+using Microsoft.UI.Xaml.Media;
+
+namespace OpenClaw.SetupEngine.UI;
+
+internal static class IconFonts
+{
+    public static FontFamily SymbolThemeFontFamily =>
+        (FontFamily)Application.Current.Resources["SymbolThemeFontFamily"];
+}

src/OpenClaw.SetupEngine.UI/Pages/CapabilitiesPage.xaml.cs

@@ -74,7 +74,7 @@ private void BuildToggles()
             var icon = new TextBlock
             {
                 Text = glyph,
-                FontFamily = new Microsoft.UI.Xaml.Media.FontFamily("Segoe Fluent Icons"),
+                FontFamily = IconFonts.SymbolThemeFontFamily,
                 FontSize = 20,
                 VerticalAlignment = VerticalAlignment.Center,
                 Margin = new Thickness(0, 0, 12, 0),

src/OpenClaw.SetupEngine.UI/Pages/CompletePage.xaml

@@ -19,7 +19,7 @@
                     CornerRadius="48" HorizontalAlignment="Center"
                     Margin="0,0,0,20" Visibility="Collapsed"
                     Background="#3CFF4444">
-                <TextBlock Text="&#xE783;" FontFamily="Segoe Fluent Icons"
+                <TextBlock Text="&#xE783;" FontFamily="{ThemeResource SymbolThemeFontFamily}"
                            FontSize="42" Foreground="#FF6B6B"
                            HorizontalAlignment="Center"
                            VerticalAlignment="Center" />
@@ -58,7 +58,7 @@
                     Margin="0,20,0,0">
                 <StackPanel Spacing="6">
                     <StackPanel Orientation="Horizontal" Spacing="10">
-                        <TextBlock Text="&#xE7BA;" FontFamily="Segoe Fluent Icons" FontSize="16"
+                        <TextBlock Text="&#xE7BA;" FontFamily="{ThemeResource SymbolThemeFontFamily}" FontSize="16"
                                    VerticalAlignment="Center" Foreground="#FFC107" />
                         <TextBlock Text="Node Mode Active" FontSize="15" FontWeight="SemiBold" />
                     </StackPanel>

src/OpenClaw.SetupEngine.UI/Pages/PermissionsPage.xaml

@@ -27,7 +27,7 @@
             <Button x:Name="RefreshButton" HorizontalAlignment="Right"
                     Padding="12,8,12,8" Click="Refresh_Click">
                 <StackPanel Orientation="Horizontal" Spacing="8">
-                    <TextBlock Text="&#xE72C;" FontFamily="Segoe Fluent Icons" FontSize="14"
+                    <TextBlock Text="&#xE72C;" FontFamily="{ThemeResource SymbolThemeFontFamily}" FontSize="14"
                                VerticalAlignment="Center" />
                     <TextBlock Text="Refresh status" FontSize="13" VerticalAlignment="Center" />
                 </StackPanel>

src/OpenClaw.SetupEngine.UI/Pages/PermissionsPage.xaml.cs

@@ -69,7 +69,7 @@ private static FrameworkElement BuildRow(PermDef perm, string status, bool grant
             Child = new TextBlock
             {
                 Text = perm.Glyph,
-                FontFamily = new FontFamily("Segoe Fluent Icons"),
+                FontFamily = IconFonts.SymbolThemeFontFamily,
                 FontSize = 20,
                 Foreground = new SolidColorBrush(isDark ? Microsoft.UI.Colors.White : Microsoft.UI.Colors.White),
                 HorizontalAlignment = HorizontalAlignment.Center,
@@ -97,7 +97,7 @@ private static FrameworkElement BuildRow(PermDef perm, string status, bool grant
             var btnContent = new StackPanel { Orientation = Orientation.Horizontal, Spacing = 6 };
             btnContent.Children.Add(new TextBlock
             {
-                Text = "\uE8A7", FontFamily = new FontFamily("Segoe Fluent Icons"),
+                Text = "\uE8A7", FontFamily = IconFonts.SymbolThemeFontFamily,
                 FontSize = 14, VerticalAlignment = VerticalAlignment.Center
             });
             btnContent.Children.Add(new TextBlock { Text = "Open Settings", FontSize = 13, VerticalAlignment = VerticalAlignment.Center });

src/OpenClaw.SetupEngine.UI/Pages/ProgressPage.xaml.cs

@@ -369,7 +369,7 @@ private static Border CreateIconBadge(string glyph, Color background, Color fore
             {
                 Glyph = glyph,
                 FontSize = 12,
-                FontFamily = new FontFamily("Segoe Fluent Icons"),
+                FontFamily = IconFonts.SymbolThemeFontFamily,
                 Foreground = new SolidColorBrush(foreground),
                 HorizontalAlignment = HorizontalAlignment.Center,
                 VerticalAlignment = VerticalAlignment.Center,

src/OpenClaw.Tray.WinUI/A2UI/Hosting/SurfaceHost.cs

@@ -9,6 +9,7 @@
 using OpenClawTray.A2UI.Protocol;
 using OpenClawTray.A2UI.Rendering;
 using OpenClawTray.A2UI.Theming;
+using OpenClawTray.Helpers;
 
 namespace OpenClawTray.A2UI.Hosting;
 
@@ -260,7 +261,7 @@ private static FrameworkElement BuildErrorPlaceholder(string componentName, stri
         stack.Children.Add(new FontIcon
         {
             Glyph = "",
-            FontFamily = new FontFamily("Segoe Fluent Icons"),
+            FontFamily = FluentIconCatalog.SymbolThemeFontFamily,
         });
         stack.Children.Add(new TextBlock
         {

src/OpenClaw.Tray.WinUI/A2UI/Rendering/Renderers/DisplayRenderers.cs

@@ -4,6 +4,7 @@
 using Microsoft.UI.Xaml.Controls;
 using Microsoft.UI.Xaml.Media;
 using OpenClawTray.A2UI.Protocol;
+using OpenClawTray.Helpers;
 
 namespace OpenClawTray.A2UI.Rendering.Renderers;
 
@@ -232,7 +233,7 @@ public FrameworkElement Render(A2UIComponentDef c, RenderContext ctx)
     {
         var fontIcon = new FontIcon
         {
-            FontFamily = new FontFamily("Segoe Fluent Icons"),
+            FontFamily = FluentIconCatalog.SymbolThemeFontFamily,
             FontSize = 16,
         };
         var nameVal = ctx.GetValue(c, "name");

src/OpenClaw.Tray.WinUI/A2UI/Rendering/Renderers/UnknownRenderer.cs

@@ -3,6 +3,7 @@
 using Microsoft.UI.Xaml.Controls;
 using Microsoft.UI.Xaml.Media;
 using OpenClawTray.A2UI.Protocol;
+using OpenClawTray.Helpers;
 
 namespace OpenClawTray.A2UI.Rendering.Renderers;
 
@@ -29,7 +30,7 @@ public FrameworkElement Render(A2UIComponentDef component, RenderContext ctx)
         stack.Children.Add(new FontIcon
         {
             Glyph = "", // outlined warning
-            FontFamily = new FontFamily("Segoe Fluent Icons"),
+            FontFamily = FluentIconCatalog.SymbolThemeFontFamily,
         });
         var template = OpenClawTray.Helpers.LocalizationHelper.GetString("A2UI_UnsupportedComponent");
         stack.Children.Add(new TextBlock

src/OpenClaw.Tray.WinUI/Chat/OpenClawChatTimeline.cs

@@ -785,7 +785,7 @@ Element HoverIcon(string entryId, string actionKey, string glyph, string ackGlyp
                 TextBlock(shownGlyph)
                     .Set(t =>
                     {
-                        t.FontFamily = new FontFamily("Segoe Fluent Icons, Segoe MDL2 Assets");
+                        t.FontFamily = FluentIconCatalog.SymbolThemeFontFamily;
                         t.FontSize = 14;
                         t.FontWeight = Microsoft.UI.Text.FontWeights.Light;
                         t.Foreground = shownColor;
@@ -1062,7 +1062,7 @@ Element RenderUserEntry(ChatTimelineItem entry, bool startsBurst, bool endsBurst
                                 TextBlock(fileGlyph)
                                     .Set(t =>
                                     {
-                                        t.FontFamily = new FontFamily("Segoe Fluent Icons");
+                                        t.FontFamily = FluentIconCatalog.SymbolThemeFontFamily;
                                         t.FontSize = 16;
                                         t.Foreground = userBubbleFg;
                                         t.VerticalAlignment = VerticalAlignment.Center;

src/OpenClaw.Tray.WinUI/Chat/OpenClawComposer.cs

@@ -425,7 +425,7 @@ public override Element Render()
                     TextBlock("\uE711") // Cancel glyph
                         .Set(t =>
                         {
-                            t.FontFamily = new FontFamily("Segoe Fluent Icons");
+                            t.FontFamily = FluentIconCatalog.SymbolThemeFontFamily;
                             t.FontSize = 10;
                         }),
                     () => Props.OnAttachmentRemoved?.Invoke())
@@ -491,7 +491,7 @@ public override Element Render()
                     thumb = TextBlock("\uEB9F")
                         .Set(t =>
                         {
-                            t.FontFamily = new FontFamily("Segoe Fluent Icons");
+                            t.FontFamily = FluentIconCatalog.SymbolThemeFontFamily;
                             t.FontSize = 16;
                             t.VerticalAlignment = VerticalAlignment.Center;
                         });
@@ -505,7 +505,7 @@ public override Element Render()
                         TextBlock("\uE711")
                             .Set(t =>
                             {
-                                t.FontFamily = new FontFamily("Segoe Fluent Icons");
+                                t.FontFamily = FluentIconCatalog.SymbolThemeFontFamily;
                                 t.FontSize = 10;
                                 t.HorizontalAlignment = HorizontalAlignment.Center;
                                 t.VerticalAlignment = VerticalAlignment.Center;
@@ -554,7 +554,7 @@ public override Element Render()
                         TextBlock("\uE8A5") // Page glyph
                             .Set(t =>
                             {
-                                t.FontFamily = new FontFamily("Segoe Fluent Icons");
+                                t.FontFamily = FluentIconCatalog.SymbolThemeFontFamily;
                                 t.FontSize = 12;
                                 t.VerticalAlignment = VerticalAlignment.Center;
                             })
@@ -685,7 +685,7 @@ Element IconButton(string glyph, string tip, Action onClick, Brush? foreground =
                 TextBlock(glyph)
                     .Set(t =>
                     {
-                        t.FontFamily = new FontFamily("Segoe Fluent Icons");
+                        t.FontFamily = FluentIconCatalog.SymbolThemeFontFamily;
                         t.FontSize = composerIconSize;
                         // Always set foreground explicitly so element diffing resets it.
                         t.Foreground = foreground
@@ -773,7 +773,7 @@ Element IconButton(string glyph, string tip, Action onClick, Brush? foreground =
             TextBlock(sendGlyph)
                 .Set(t =>
                 {
-                    t.FontFamily = new FontFamily("Segoe Fluent Icons");
+                    t.FontFamily = FluentIconCatalog.SymbolThemeFontFamily;
                     t.FontSize = composerIconSize;
                 })
                 .Foreground(glyphBrush),
@@ -819,7 +819,7 @@ Element IconButton(string glyph, string tip, Action onClick, Brush? foreground =
                 TextBlock(stopGlyph)
                     .Set(t =>
                     {
-                        t.FontFamily = new FontFamily("Segoe Fluent Icons");
+                        t.FontFamily = FluentIconCatalog.SymbolThemeFontFamily;
                         t.FontSize = composerIconSize;
                     })
                     .Foreground(new SolidColorBrush(Colors.White)),

src/OpenClaw.Tray.WinUI/Helpers/FluentIconCatalog.cs

@@ -103,6 +103,9 @@ public static class FluentIconCatalog
     public const string Workspace = "\uE8DA";      // OpenLocal (alias of Folder)
     public const string Cron = "\uE787";           // Calendar — Cron / scheduled jobs (matches HubWindow search mapping)
 
+    public static FontFamily SymbolThemeFontFamily =>
+        (FontFamily)Application.Current.Resources["SymbolThemeFontFamily"];
+
     /// <summary>
     /// Builds a <see cref="FontIcon"/> for the given PUA glyph using the
     /// system-resolved <c>SymbolThemeFontFamily</c> so the icon honors
@@ -114,7 +117,7 @@ public static FontIcon Build(string glyph, double size = 16)
         return new FontIcon
         {
             Glyph = glyph,
-            FontFamily = (FontFamily)Application.Current.Resources["SymbolThemeFontFamily"],
+            FontFamily = SymbolThemeFontFamily,
             FontSize = size,
         };
     }

tests/OpenClaw.Tray.Tests/FluentIconCatalogTests.cs

@@ -95,6 +95,45 @@ public void Catalog_DefinesBuildHelper()
         Assert.Contains("SymbolThemeFontFamily", src);
     }
 
+    [Fact]
+    public void NativeWinUiSources_DoNotHardcodeSegoeFluentIcons()
+    {
+        var repositoryRoot = TestRepositoryPaths.GetRepositoryRoot();
+        var sourceRoots = new[]
+        {
+            Path.Combine(repositoryRoot, "src", "OpenClaw.Tray.WinUI"),
+            Path.Combine(repositoryRoot, "src", "OpenClaw.SetupEngine.UI"),
+        };
+        var hardcodedIconFont = new Regex(
+            @"FontFamily\s*\(\s*""Segoe Fluent Icons""\s*\)|FontFamily\s*=\s*""Segoe Fluent Icons""",
+            RegexOptions.Compiled);
+
+        var offenders = sourceRoots
+            .SelectMany(sourceRoot => Directory
+                .EnumerateFiles(sourceRoot, "*", SearchOption.AllDirectories)
+                .Where(path => path.EndsWith(".cs", StringComparison.OrdinalIgnoreCase)
+                    || path.EndsWith(".xaml", StringComparison.OrdinalIgnoreCase))
+                .Where(path => !IsBuildArtifact(sourceRoot, path)))
+            .SelectMany(path => File.ReadLines(path)
+                .Select((line, index) => (path, line, lineNumber: index + 1)))
+            .Where(item => hardcodedIconFont.IsMatch(item.line))
+            .Select(item => $"{Path.GetRelativePath(repositoryRoot, item.path)}:{item.lineNumber}")
+            .ToArray();
+
+        Assert.True(
+            offenders.Length == 0,
+            "Use the SymbolThemeFontFamily theme resource/property so icon glyphs fall back to Segoe MDL2 Assets on Windows 10:"
+            + Environment.NewLine
+            + string.Join(Environment.NewLine, offenders));
+
+        static bool IsBuildArtifact(string sourceRoot, string path)
+        {
+            var relative = Path.GetRelativePath(sourceRoot, path);
+            return relative.StartsWith($"bin{Path.DirectorySeparatorChar}", StringComparison.OrdinalIgnoreCase)
+                || relative.StartsWith($"obj{Path.DirectorySeparatorChar}", StringComparison.OrdinalIgnoreCase);
+        }
+    }
+
 }
 
 /// <summary>

tests/OpenClaw.Tray.UITests/A2UIControlMatrixTests.cs

@@ -243,7 +243,7 @@ await _ui.RunOnUIAsync(() =>
     }
 
     [Fact]
-    public Task Icon_RendersFontIcon_WithSegoeFluentGlyph() => RunAsync(
+    public Task Icon_RendersFontIcon_WithSymbolThemeFontFamily() => RunAsync(
         "Icon → FontIcon",
         Surface("s", "i", new[]
         {
@@ -252,7 +252,8 @@ public Task Icon_RendersFontIcon_WithSegoeFluentGlyph() => RunAsync(
         root =>
         {
             var fi = FindLogical<FontIcon>(root).Single();
-            Assert.Equal("Segoe Fluent Icons", fi.FontFamily.Source);
+            var expectedFont = (Microsoft.UI.Xaml.Media.FontFamily)Application.Current.Resources["SymbolThemeFontFamily"];
+            Assert.Equal(expectedFont.Source, fi.FontFamily.Source);
             // "search" maps to the Segoe MDL2 Search glyph (U+E721).
             Assert.Equal("", fi.Glyph);
         });