feat: add Reset View, Show Word Borders, and Overlay Opacity to View menu

- Reset View resets zoom/pan via middle-click or menu item
- Show Word Borders toggles RectanglesCanvas visibility
- Overlay Opacity submenu switches between Off and 5% background tint
- overlayOpacity field ensures chosen opacity persists through freeze/unfreeze

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: TheJoeFin

Text-Grab/Views/GrabFrame.xaml

@@ -356,6 +356,34 @@
                             IsCheckable="True"
                             Tag="ZoomWhenFrozen" />
                         <Separator />
+                        <MenuItem
+                            x:Name="ResetViewMenuItem"
+                            Click="ResetViewMenuItem_Click"
+                            Header="Reset View"
+                            InputGestureText="Middle Click" />
+                        <Separator />
+                        <MenuItem
+                            x:Name="ShowWordBordersMenuItem"
+                            Click="ShowWordBordersMenuItem_Click"
+                            Header="Show Word Borders"
+                            IsCheckable="True"
+                            IsChecked="True" />
+                        <MenuItem Header="Overlay Opacity">
+                            <MenuItem
+                                x:Name="OverlayOpacityOffMenuItem"
+                                Click="OverlayOpacityMenuItem_Click"
+                                Header="Off"
+                                IsCheckable="True"
+                                Tag="0" />
+                            <MenuItem
+                                x:Name="OverlayOpacityLowMenuItem"
+                                Click="OverlayOpacityMenuItem_Click"
+                                Header="5%"
+                                IsCheckable="True"
+                                IsChecked="True"
+                                Tag="0.05" />
+                        </MenuItem>
+                        <Separator />
                         <MenuItem
                             x:Name="CloseOnGrabMenuItem"
                             Click="CloseOnGrabMenuItem_Click"

Text-Grab/Views/GrabFrame.xaml.cs

@@ -84,6 +84,7 @@ public partial class GrabFrame : Window
     private readonly ObservableCollection<WordBorder> wordBorders = [];
     private static readonly Settings DefaultSettings = AppUtilities.TextGrabSettings;
     private ScrollBehavior scrollBehavior = ScrollBehavior.Resize;
+    private double overlayOpacity = 0.05;
     private bool isTranslationEnabled = false;
     private string translationTargetLanguage = "English";
     private readonly DispatcherTimer translationTimer = new();
@@ -3356,7 +3357,7 @@ private void UnfreezeGrabFrame()
         GrabFrameImage.Opacity = 0;
         frameContentImageSource = null;
         historyItem = null;
-        RectanglesBorder.Background.Opacity = 0.05;
+        RectanglesBorder.Background.Opacity = overlayOpacity;
         FreezeToggleButton.IsChecked = false;
         FreezeToggleButton.Visibility = Visibility.Visible;
         Background = new SolidColorBrush(Colors.Transparent);
@@ -3483,6 +3484,36 @@ private void CloseOnGrabMenuItem_Click(object sender, RoutedEventArgs e)
         DefaultSettings.Save();
     }
 
+    private void ResetViewMenuItem_Click(object sender, RoutedEventArgs e)
+    {
+        MainZoomBorder.Reset();
+    }
+
+    private void ShowWordBordersMenuItem_Click(object sender, RoutedEventArgs e)
+    {
+        RectanglesCanvas.Visibility = ShowWordBordersMenuItem.IsChecked is true
+            ? Visibility.Visible
+            : Visibility.Hidden;
+    }
+
+    private void OverlayOpacityMenuItem_Click(object sender, RoutedEventArgs e)
+    {
+        if (sender is not MenuItem clicked
+            || clicked.Tag is not string tagStr
+            || !double.TryParse(tagStr, System.Globalization.NumberStyles.Float,
+                System.Globalization.CultureInfo.InvariantCulture, out double opacity))
+            return;
+
+        overlayOpacity = opacity;
+
+        OverlayOpacityOffMenuItem.IsChecked = false;
+        OverlayOpacityLowMenuItem.IsChecked = false;
+        clicked.IsChecked = true;
+
+        if (!IsFreezeMode)
+            RectanglesBorder.Background.Opacity = overlayOpacity;
+    }
+
     private void CanExecuteGrab(object sender, CanExecuteRoutedEventArgs e)
     {
         if (string.IsNullOrEmpty(FrameText))