[FileLocksmith]Show process files in modal dialog to fix crash (#33804)

## Summary of the Pull Request
To prevent a crash, show the individual files of a process within a
modal dialog rather than as inline text. Please see the linked issue for
more details.

## Detailed Description of the Pull Request / Additional comments
- Removed inline list of process files.
- Added "Show files" button to expander to show list of process files as
a modal dialog. This dialog has the same design as the one used to
display the list of selected folders within the same application.
- Added unhandled exception hander to application similar to our other
applications.


![image](https://github.com/user-attachments/assets/52eddfcc-5e10-40a3-94b2-68bbfb607f1d)

![image](https://github.com/user-attachments/assets/ff996e32-36f6-41a9-a9f0-6dda7a93d09a)

src/modules/FileLocksmith/FileLocksmithUI/FileLocksmithXAML/App.xaml.cs

@@ -25,6 +25,8 @@ namespace FileLocksmithUI
             Logger.InitializeLogger("\\File Locksmith\\FileLocksmithUI\\Logs");
 
             this.InitializeComponent();
+
+            UnhandledException += App_UnhandledException;
         }
 
         /// <summary>
@@ -55,6 +57,11 @@ namespace FileLocksmithUI
             _window.Activate();
         }
 
+        private void App_UnhandledException(object sender, Microsoft.UI.Xaml.UnhandledExceptionEventArgs e)
+        {
+            Logger.LogError("Unhandled exception", e.Exception);
+        }
+
         private Window _window;
     }
 }

src/modules/FileLocksmith/FileLocksmithUI/FileLocksmithXAML/Views/MainPage.xaml

@@ -141,27 +141,16 @@
                                             IsTextSelectionEnabled="True"
                                             Text="{x:Bind user}" />
                                     </tkcontrols:SettingsCard>
-                                    <tkcontrols:SettingsCard ContentAlignment="Vertical">
+                                    <tkcontrols:SettingsCard>
                                         <tkcontrols:SettingsCard.Header>
                                             <TextBlock>
                                                 <Run x:Uid="Files" />
                                                 <Run Text="(" /><Run Text="{x:Bind files, Converter={StaticResource fileCountConverter}}" /><Run Text=")" />
                                             </TextBlock>
                                         </tkcontrols:SettingsCard.Header>
-                                        <ItemsRepeater ItemsSource="{x:Bind files}">
-                                            <ItemsRepeater.ItemTemplate>
-                                                <DataTemplate x:DataType="x:String">
-                                                    <TextBlock
-                                                        Foreground="{ThemeResource TextFillColorSecondaryBrush}"
-                                                        IsTextSelectionEnabled="True"
-                                                        Style="{StaticResource CaptionTextBlockStyle}"
-                                                        Text="{Binding}"
-                                                        TextTrimming="CharacterEllipsis"
-                                                        TextWrapping="NoWrap"
-                                                        ToolTipService.ToolTip="{Binding}" />
-                                                </DataTemplate>
-                                            </ItemsRepeater.ItemTemplate>
-                                        </ItemsRepeater>
+                                        <Button Click="ShowProcessFiles_Click">
+                                            <TextBlock x:Uid="ShowProcessFiles" />
+                                        </Button>
                                     </tkcontrols:SettingsCard>
                                 </tkcontrols:SettingsExpander.Items>
                             </tkcontrols:SettingsExpander>
@@ -200,5 +189,13 @@
                 Text="{x:Bind ViewModel.PathsToString, Mode=OneWay}"
                 TextWrapping="Wrap" />
         </ContentDialog>
+        <ContentDialog x:Name="ProcessFilesListDialog" x:Uid="ProcessFilesListDialog">
+            <ScrollViewer Padding="15" HorizontalScrollBarVisibility="Auto">
+                <TextBlock
+                    x:Name="ProcessFilesListDialogTextBlock"
+                    x:Uid="ProcessFilesListDialogTextBlock"
+                    IsTextSelectionEnabled="True" />
+            </ScrollViewer>
+        </ContentDialog>
     </Grid>
 </Page>

src/modules/FileLocksmith/FileLocksmithUI/FileLocksmithXAML/Views/MainPage.xaml.cs

@@ -3,6 +3,8 @@
 // See the LICENSE file in the project root for more information.
 
 using System;
+using FileLocksmith.Interop;
+using Microsoft.UI.Xaml;
 using Microsoft.UI.Xaml.Controls;
 using PowerToys.FileLocksmithUI.ViewModels;
 
@@ -19,9 +21,17 @@ namespace PowerToys.FileLocksmithUI.Views
             DataContext = ViewModel;
         }
 
-        private async void ShowSelectedPathsButton_Click(object sender, Microsoft.UI.Xaml.RoutedEventArgs e)
+        private async void ShowSelectedPathsButton_Click(object sender, RoutedEventArgs e)
         {
             await SelectedFilesListDialog.ShowAsync();
         }
+
+        private async void ShowProcessFiles_Click(object sender, RoutedEventArgs e)
+        {
+            var processResult = (ProcessResult)((FrameworkElement)sender).DataContext;
+            ProcessFilesListDialogTextBlock.Text = string.Join(Environment.NewLine, processResult.files);
+
+            await ProcessFilesListDialog.ShowAsync();
+        }
     }
 }

src/modules/FileLocksmith/FileLocksmithUI/Strings/en-us/Resources.resw

@@ -130,6 +130,13 @@
   <data name="Files.Text" xml:space="preserve">
     <value>Files</value>
   </data>
+  <data name="ProcessFilesListDialog.Title" xml:space="preserve">
+    <value>Files</value>
+  </data>
+  <data name="ProcessFilesListDialog.CloseButtonText" xml:space="preserve">
+    <value>Close</value>
+    <comment>As in, close a dialog prompt.</comment>
+  </data>
   <data name="PathsTooltipDescription.Text" xml:space="preserve">
     <value>Click to see the entire list of paths.</value>
     <comment>Paths as in file paths that were selected for the utility to check.</comment>
@@ -164,4 +171,8 @@
     <value>Administrator: File Locksmith</value>
     <comment>Title of the window when running as administrator.</comment>
   </data>
+  <data name="ShowProcessFiles.Text" xml:space="preserve">
+    <value>Show files</value>
+    <comment>Show files for the selected process</comment>
+  </data>
 </root>