fix.增强应用稳定性，修复了问题组件加载异常时连带应用崩溃的问题

LanMountainDesktop.Tests/ComponentLibraryCrashRegressionTests.cs

@@ -0,0 +1,122 @@
+using System.Text.RegularExpressions;
+using LanMountainDesktop.Services;
+using Xunit;
+
+namespace LanMountainDesktop.Tests;
+
+public sealed class ComponentLibraryCrashRegressionTests
+{
+    [Fact]
+    public void BuiltInComponentXaml_DoesNotAnimateRenderTransformDirectly()
+    {
+        var componentsDirectory = FindRepositoryPath("LanMountainDesktop", "Views", "Components");
+        foreach (var file in Directory.EnumerateFiles(componentsDirectory, "*.axaml", SearchOption.AllDirectories))
+        {
+            var xaml = File.ReadAllText(file);
+            foreach (Match match in Regex.Matches(
+                         xaml,
+                         @"<Style\.Animations>[\s\S]*?</Style\.Animations>",
+                         RegexOptions.CultureInvariant))
+            {
+                Assert.DoesNotContain(
+                    "Property=\"RenderTransform\"",
+                    match.Value,
+                    StringComparison.Ordinal);
+            }
+        }
+    }
+
+    [Fact]
+    public void ComponentLibraryPreviewPages_FallBackWhenPreviewAttachFails()
+    {
+        var source = ReadRepositoryFile("LanMountainDesktop", "Views", "MainWindow.ComponentSystem.cs");
+        var buildSource = ExtractMethodSource(source, "BuildComponentLibraryComponentPages");
+        var pageSource = ExtractMethodSource(source, "CreateComponentLibraryComponentPage");
+        var contentSource = ExtractMethodSource(source, "CreateComponentLibraryComponentPageContent");
+
+        Assert.Contains("try", buildSource);
+        Assert.Contains("ComponentLibraryComponentPagesContainer.Children.Add(page)", buildSource);
+        Assert.Contains("forceFallback: true", buildSource);
+        Assert.Contains("UiExceptionGuard.IsFatalException", buildSource);
+
+        Assert.Contains("CreateStaticComponentPreviewFallback", contentSource);
+        Assert.Contains("forceFallback", pageSource);
+    }
+
+    [Fact]
+    public void SoftwareRenderRetry_IsDisabledAfterAvaloniaLifetimeStarts()
+    {
+        var shouldRetry = Program.ShouldRetryWithSoftwareRendering(
+            AppRenderingModeHelper.Default,
+            new InvalidOperationException("render failed"),
+            isAvaloniaLifetimeStarted: true);
+
+        Assert.False(shouldRetry);
+    }
+
+    private static string ReadRepositoryFile(params string[] segments)
+    {
+        var path = FindRepositoryPath(segments);
+        return File.ReadAllText(path);
+    }
+
+    private static string FindRepositoryPath(params string[] segments)
+    {
+        var directory = new DirectoryInfo(AppContext.BaseDirectory);
+        while (directory is not null)
+        {
+            var candidate = Path.Combine(new[] { directory.FullName }.Concat(segments).ToArray());
+            if (File.Exists(candidate) || Directory.Exists(candidate))
+            {
+                return candidate;
+            }
+
+            if (File.Exists(Path.Combine(directory.FullName, "LanMountainDesktop.slnx")))
+            {
+                break;
+            }
+
+            directory = directory.Parent;
+        }
+
+        throw new FileNotFoundException($"Could not locate repository path '{Path.Combine(segments)}'.");
+    }
+
+    private static string ExtractMethodSource(string source, string methodName)
+    {
+        var methodIndex = source.IndexOf($"private void {methodName}(", StringComparison.Ordinal);
+        if (methodIndex < 0)
+        {
+            methodIndex = source.IndexOf($"private Grid {methodName}(", StringComparison.Ordinal);
+        }
+
+        if (methodIndex < 0)
+        {
+            methodIndex = source.IndexOf($"private StackPanel {methodName}(", StringComparison.Ordinal);
+        }
+
+        Assert.True(methodIndex >= 0, $"Could not locate method '{methodName}'.");
+
+        var braceIndex = source.IndexOf('{', methodIndex);
+        Assert.True(braceIndex >= 0, $"Could not locate method body for '{methodName}'.");
+
+        var depth = 0;
+        for (var i = braceIndex; i < source.Length; i++)
+        {
+            if (source[i] == '{')
+            {
+                depth++;
+            }
+            else if (source[i] == '}')
+            {
+                depth--;
+                if (depth == 0)
+                {
+                    return source.Substring(methodIndex, i - methodIndex + 1);
+                }
+            }
+        }
+
+        throw new InvalidOperationException($"Could not extract method '{methodName}'.");
+    }
+}

LanMountainDesktop/Program.cs

@@ -54,7 +54,7 @@ public sealed class Program
             WriteCrashDump(ex, StartupRenderMode);
 
             // 渲染模式安全降级：若失败且未禁用重试，且当前不是软件渲染，则用软件渲染重试一次
-            if (ShouldRetryWithSoftwareRendering(StartupRenderMode, ex) &&
+            if (ShouldRetryWithSoftwareRendering(StartupRenderMode, ex, isAvaloniaLifetimeStarted: Application.Current is not null) &&
                 !attemptedRenderModes.Contains(AppRenderingModeHelper.Software))
             {
                 AppLogger.Warn("Startup", $"Retrying startup with Software rendering mode (previous='{StartupRenderMode}').");
@@ -195,8 +195,16 @@ public sealed class Program
     /// 判断是否应该用软件渲染重试。当异常看起来与渲染相关（GPU/驱动/平台初始化），
     /// 且当前渲染模式不是软件渲染，且未通过环境变量禁用重试时返回 true。
     /// </summary>
-    private static bool ShouldRetryWithSoftwareRendering(string currentRenderMode, Exception ex)
+    internal static bool ShouldRetryWithSoftwareRendering(
+        string currentRenderMode,
+        Exception ex,
+        bool isAvaloniaLifetimeStarted = false)
     {
+        if (isAvaloniaLifetimeStarted)
+        {
+            return false;
+        }
+
         if (string.Equals(currentRenderMode, AppRenderingModeHelper.Software, StringComparison.OrdinalIgnoreCase))
         {
             return false;

LanMountainDesktop/Styles/GlassModule.axaml

@@ -26,6 +26,7 @@
         <Setter Property="Foreground" Value="{DynamicResource AdaptiveTextPrimaryBrush}" />
         <Setter Property="FontSize" Value="14" />
         <Setter Property="Padding" Value="16,10" />
+        <Setter Property="RenderTransform" Value="scale(1)" />
         <Setter Property="Transitions">
             <Transitions>
                 <TransformOperationsTransition Property="RenderTransform" Duration="{StaticResource FluttermotionToken.Duration.Fast}" />

LanMountainDesktop/Styles/NavigationStyles.axaml

@@ -150,6 +150,7 @@
     </Style>
 
     <Style Selector="ui|FANavigationViewItem.settings-nav-item">
+        <Setter Property="RenderTransform" Value="scale(1)" />
         <Setter Property="Transitions">
             <Transitions>
                 <BrushTransition Property="Background" Duration="0:0:0.083" Easing="0.05,0.75,0.10,1.00" />

LanMountainDesktop/Styles/SettingsAnimations.axaml

@@ -51,6 +51,7 @@
         <Setter Property="Padding" Value="12,6" />
         <Setter Property="Margin" Value="0,0,8,8" />
         <Setter Property="MinHeight" Value="34" />
+        <Setter Property="RenderTransform" Value="scale(1)" />
         <Setter Property="Transitions">
             <Transitions>
                 <BrushTransition Property="Background" Duration="{StaticResource FluttermotionToken.Duration.Standard}" Easing="0.05,0.75,0.10,1.00" />
@@ -72,6 +73,7 @@
     </Style>
 
     <Style Selector=".settings-scope ComboBox">
+        <Setter Property="RenderTransform" Value="scale(1)" />
         <Setter Property="Transitions">
             <Transitions>
                 <BrushTransition Property="Background" Duration="{StaticResource FluttermotionToken.Duration.Fast}" Easing="0.05,0.75,0.10,1.00" />
@@ -85,6 +87,7 @@
     </Style>
 
     <Style Selector=".settings-scope ToggleSwitch">
+        <Setter Property="RenderTransform" Value="scale(1)" />
         <Setter Property="Transitions">
             <Transitions>
                 <DoubleTransition Property="Opacity" Duration="{StaticResource FluttermotionToken.Duration.Standard}" Easing="0.05,0.75,0.10,1.00" />

LanMountainDesktop/Views/Components/CnrDailyNewsWidget.axaml

@@ -48,7 +48,15 @@
                         Background="{DynamicResource CardBackgroundSecondaryBrush}"
                         BorderBrush="Transparent"
                         BorderThickness="0"
+                        RenderTransform="scale(1)"
                         Cursor="Hand">
+                    <Button.Transitions>
+                        <Transitions>
+                            <BrushTransition Property="Background" Duration="0:0:0.15" Easing="CubicEaseOut" />
+                            <TransformOperationsTransition Property="RenderTransform" Duration="0:0:0.10" Easing="CubicEaseOut" />
+                        </Transitions>
+                    </Button.Transitions>
+
                     <StackPanel Orientation="Horizontal"
                                 Spacing="6"
                                 HorizontalAlignment="Center"
@@ -70,27 +78,13 @@
                     <Button.Styles>
                         <!-- 悬停状态 -->
                         <Style Selector="Button:pointerover">
-                            <Style.Animations>
-                                <Animation Duration="0:0:0.15" Easing="CubicEaseOut">
-                                    <KeyFrame Cue="100%">
-                                        <Setter Property="Background" Value="{DynamicResource CardBackgroundHoverBrush}"/>
-                                    </KeyFrame>
-                                </Animation>
-                            </Style.Animations>
+                            <Setter Property="Background" Value="{DynamicResource CardBackgroundHoverBrush}"/>
                         </Style>
 
                         <!-- 按下状态 -->
                         <Style Selector="Button:pressed">
-                            <Style.Animations>
-                                <Animation Duration="0:0:0.1" Easing="CubicEaseOut">
-                                    <KeyFrame Cue="100%">
-                                        <Setter Property="Background" Value="{DynamicResource CardBackgroundPressedBrush}"/>
-                                        <Setter Property="RenderTransform">
-                                            <ScaleTransform ScaleX="0.98" ScaleY="0.98"/>
-                                        </Setter>
-                                    </KeyFrame>
-                                </Animation>
-                            </Style.Animations>
+                            <Setter Property="Background" Value="{DynamicResource CardBackgroundPressedBrush}"/>
+                            <Setter Property="RenderTransform" Value="scale(0.98)"/>
                         </Style>
                     </Button.Styles>
                 </Button>

LanMountainDesktop/Views/MainWindow.ComponentSystem.cs

@@ -3655,90 +3655,40 @@ public partial class MainWindow : Window
         for (var i = 0; i < componentCount; i++)
         {
             var component = _componentLibraryActiveComponents[i];
-
-            var page = new Grid
-            {
-                Width = _componentLibraryComponentPageWidth,
-                Height = viewportHeight,
-                Background = Brushes.Transparent
-            };
-
-            // Fit the preview to the page while preserving component cell span proportions.
-            var previewMaxWidth = _componentLibraryComponentPageWidth * 0.94;
-            var previewMaxHeight = viewportHeight * 0.86;
             var previewSpan = NormalizeComponentCellSpan(
                 component.ComponentId,
                 (component.MinWidthCells, component.MinHeightCells));
-            var previewCellSize = Math.Min(
-                previewMaxWidth / Math.Max(1, previewSpan.WidthCells),
-                previewMaxHeight / Math.Max(1, previewSpan.HeightCells));
-            previewCellSize = Math.Clamp(previewCellSize, 24, 96);
-
-            var previewWidth = previewSpan.WidthCells * previewCellSize;
-            var previewHeight = previewSpan.HeightCells * previewCellSize;
-            var previewControl = CreateStaticComponentLibraryPreview(
-                component.ComponentId,
-                previewCellSize,
-                previewWidth,
-                previewHeight);
-
-            var previewSurface = new Border
-            {
-                Width = previewWidth,
-                Height = previewHeight,
-                Background = Brushes.Transparent,
-                ClipToBounds = false,
-                Child = previewControl,
-                IsHitTestVisible = false
-            };
-
-            var previewBorder = new Border
-            {
-                Width = previewWidth,
-                Height = previewHeight,
-                ClipToBounds = false,
-                Background = Brushes.Transparent,
-                BorderThickness = new Thickness(0),
-                Child = previewSurface,
-                Tag = component.ComponentId
-            };
-            previewBorder.PointerPressed += OnComponentLibraryComponentPreviewPointerPressed;
-
-            var label = new TextBlock
-            {
-                Text = GetLocalizedComponentDisplayName(component),
-                FontSize = 14,
-                FontWeight = FontWeight.SemiBold,
-                Foreground = GetThemeBrush("AdaptiveTextPrimaryBrush"),
-                HorizontalAlignment = HorizontalAlignment.Center
-            };
-
-            var hint = new TextBlock
-            {
-                Text = L("component_library.drag_hint", "Drag to place"),
-                FontSize = 12,
-                Foreground = GetThemeBrush("AdaptiveTextSecondaryBrush"),
-                HorizontalAlignment = HorizontalAlignment.Center
-            };
-
-            var stack = new StackPanel
-            {
-                Spacing = 8,
-                HorizontalAlignment = HorizontalAlignment.Center,
-                VerticalAlignment = VerticalAlignment.Center,
-                Children =
-                {
-                    previewBorder,
-                    label,
-                    hint
-                }
-            };
-
-            page.Children.Add(stack);
+            var page = CreateComponentLibraryComponentPage(
+                component,
+                previewSpan,
+                _componentLibraryComponentPageWidth,
+                viewportHeight);
 
             Grid.SetRow(page, 0);
             Grid.SetColumn(page, i);
-            ComponentLibraryComponentPagesContainer.Children.Add(page);
+
+            try
+            {
+                ComponentLibraryComponentPagesContainer.Children.Add(page);
+            }
+            catch (Exception ex) when (!UiExceptionGuard.IsFatalException(ex))
+            {
+                AppLogger.Warn(
+                    "ComponentLibrary",
+                    $"Failed to attach component library preview page for component '{component.ComponentId}'. Falling back to placeholder.",
+                    ex);
+
+                DisposeStaticComponentLibraryPreviews([page]);
+                var fallbackPage = CreateComponentLibraryComponentPage(
+                    component,
+                    previewSpan,
+                    _componentLibraryComponentPageWidth,
+                    viewportHeight,
+                    forceFallback: true);
+                Grid.SetRow(fallbackPage, 0);
+                Grid.SetColumn(fallbackPage, i);
+                ComponentLibraryComponentPagesContainer.Children.Add(fallbackPage);
+            }
         }
 
         _componentLibraryComponentHostTransform = ComponentLibraryComponentPagesHost.RenderTransform as TranslateTransform;
@@ -3752,6 +3702,128 @@ public partial class MainWindow : Window
         UpdateComponentLibraryComponentNavigationButtons();
     }
 
+    private Grid CreateComponentLibraryComponentPage(
+        ComponentLibraryComponentEntry component,
+        (int WidthCells, int HeightCells) previewSpan,
+        double pageWidth,
+        double pageHeight,
+        bool forceFallback = false)
+    {
+        var page = new Grid
+        {
+            Width = pageWidth,
+            Height = pageHeight,
+            Background = Brushes.Transparent
+        };
+
+        try
+        {
+            var stack = CreateComponentLibraryComponentPageContent(
+                component,
+                previewSpan,
+                pageWidth,
+                pageHeight,
+                forceFallback);
+            page.Children.Add(stack);
+        }
+        catch (Exception ex) when (!UiExceptionGuard.IsFatalException(ex) && !forceFallback)
+        {
+            AppLogger.Warn(
+                "ComponentLibrary",
+                $"Failed to build component library preview page for component '{component.ComponentId}'. Falling back to placeholder.",
+                ex);
+
+            page.Children.Clear();
+            var stack = CreateComponentLibraryComponentPageContent(
+                component,
+                previewSpan,
+                pageWidth,
+                pageHeight,
+                forceFallback: true);
+            page.Children.Add(stack);
+        }
+
+        return page;
+    }
+
+    private StackPanel CreateComponentLibraryComponentPageContent(
+        ComponentLibraryComponentEntry component,
+        (int WidthCells, int HeightCells) previewSpan,
+        double pageWidth,
+        double pageHeight,
+        bool forceFallback)
+    {
+        // Fit the preview to the page while preserving component cell span proportions.
+        var previewMaxWidth = pageWidth * 0.94;
+        var previewMaxHeight = pageHeight * 0.86;
+        var previewCellSize = Math.Min(
+            previewMaxWidth / Math.Max(1, previewSpan.WidthCells),
+            previewMaxHeight / Math.Max(1, previewSpan.HeightCells));
+        previewCellSize = Math.Clamp(previewCellSize, 24, 96);
+
+        var previewWidth = previewSpan.WidthCells * previewCellSize;
+        var previewHeight = previewSpan.HeightCells * previewCellSize;
+        var previewControl = forceFallback
+            ? CreateStaticComponentPreviewFallback(previewWidth, previewHeight)
+            : CreateStaticComponentLibraryPreview(
+                component.ComponentId,
+                previewCellSize,
+                previewWidth,
+                previewHeight);
+
+        var previewSurface = new Border
+        {
+            Width = previewWidth,
+            Height = previewHeight,
+            Background = Brushes.Transparent,
+            ClipToBounds = false,
+            Child = previewControl,
+            IsHitTestVisible = false
+        };
+
+        var previewBorder = new Border
+        {
+            Width = previewWidth,
+            Height = previewHeight,
+            ClipToBounds = false,
+            Background = Brushes.Transparent,
+            BorderThickness = new Thickness(0),
+            Child = previewSurface,
+            Tag = component.ComponentId
+        };
+        previewBorder.PointerPressed += OnComponentLibraryComponentPreviewPointerPressed;
+
+        var label = new TextBlock
+        {
+            Text = GetLocalizedComponentDisplayName(component),
+            FontSize = 14,
+            FontWeight = FontWeight.SemiBold,
+            Foreground = GetThemeBrush("AdaptiveTextPrimaryBrush"),
+            HorizontalAlignment = HorizontalAlignment.Center
+        };
+
+        var hint = new TextBlock
+        {
+            Text = L("component_library.drag_hint", "Drag to place"),
+            FontSize = 12,
+            Foreground = GetThemeBrush("AdaptiveTextSecondaryBrush"),
+            HorizontalAlignment = HorizontalAlignment.Center
+        };
+
+        return new StackPanel
+        {
+            Spacing = 8,
+            HorizontalAlignment = HorizontalAlignment.Center,
+            VerticalAlignment = VerticalAlignment.Center,
+            Children =
+            {
+                previewBorder,
+                label,
+                hint
+            }
+        };
+    }
+
     private void ClearComponentLibraryPreviewControls()
     {
         if (ComponentLibraryComponentPagesContainer is null)

LanMountainDesktop/Views/MainWindow.axaml

@@ -76,6 +76,7 @@
             <Setter Property="HorizontalAlignment" Value="Stretch" />
             <Setter Property="HorizontalContentAlignment" Value="Stretch" />
             <Setter Property="MinHeight" Value="48" />
+            <Setter Property="RenderTransform" Value="scale(1)" />
             <Setter Property="Transitions">
                 <Transitions>
                     <BrushTransition Property="Background" Duration="{StaticResource FluttermotionToken.Duration.Fast}" />