Feature/Allow open/paste execution plans

Dashboard/Controls/PlanViewerControl.xaml

@@ -1,7 +1,10 @@
 <UserControl x:Class="PerformanceMonitorDashboard.Controls.PlanViewerControl"
              xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
-             Background="{DynamicResource BackgroundBrush}">
+             Background="{DynamicResource BackgroundBrush}"
+             Focusable="True"
+             PreviewMouseDown="PlanViewerControl_PreviewMouseDown"
+             PreviewKeyDown="PlanViewerControl_PreviewKeyDown">
     <Grid>
         <Grid.RowDefinitions>
             <RowDefinition Height="Auto"/>

Dashboard/Controls/PlanViewerControl.xaml.cs

@@ -1436,6 +1436,38 @@ private void PlanScrollViewer_PreviewMouseWheel(object sender, MouseWheelEventAr
         }
     }
 
+    private void PlanViewerControl_PreviewMouseDown(object sender, MouseButtonEventArgs e)
+    {
+        Focus();
+    }
+
+    private void PlanViewerControl_PreviewKeyDown(object sender, KeyEventArgs e)
+    {
+        if (e.Key == Key.V && Keyboard.Modifiers == ModifierKeys.Control
+            && e.OriginalSource is not TextBox)
+        {
+            var text = Clipboard.GetText();
+            if (!string.IsNullOrWhiteSpace(text))
+            {
+                e.Handled = true;
+                try
+                {
+                    System.Xml.Linq.XDocument.Parse(text);
+                }
+                catch (System.Xml.XmlException ex)
+                {
+                    MessageBox.Show(
+                        $"The plan XML is not valid:\n\n{ex.Message}",
+                        "Invalid Plan XML",
+                        MessageBoxButton.OK,
+                        MessageBoxImage.Warning);
+                    return;
+                }
+                LoadPlan(text, "Pasted Plan");
+            }
+        }
+    }
+
     #endregion
 
     #region Save & Statement Selection

Dashboard/Controls/QueryPerformanceContent.xaml

@@ -32,8 +32,12 @@
                     <MenuItem.Icon><TextBlock Text="📊"/></MenuItem.Icon>
                 </MenuItem>
                 <Separator/>
-                <MenuItem Header="View Plan" Click="ViewEstimatedPlan_Click"/>
-                <MenuItem Header="Get Actual Plan" Click="GetActualPlan_Click"/>
+                <MenuItem Header="View Plan" Click="ViewEstimatedPlan_Click">
+                    <MenuItem.Icon><TextBlock Text="🔍"/></MenuItem.Icon>
+                </MenuItem>
+                <MenuItem Header="Get Actual Plan" Click="GetActualPlan_Click">
+                    <MenuItem.Icon><TextBlock Text="▶"/></MenuItem.Icon>
+                </MenuItem>
             </ContextMenu>
 
             <Style x:Key="DefaultRowStyle" TargetType="DataGridRow">

Dashboard/MainWindow.xaml

@@ -183,6 +183,16 @@
                             </Border>
                         </Grid>
                     </Button>
+                    <Button x:Name="OpenPlanViewerButton"
+                            Click="OpenPlanViewer_Click"
+                            Height="32"
+                            Margin="0,0,0,8"
+                            ToolTip="Open or paste an execution plan (independent of any server)">
+                        <StackPanel Orientation="Horizontal">
+                            <TextBlock Text="&#x1F50D;" FontSize="12" VerticalAlignment="Center" Margin="0,0,6,0"/>
+                            <TextBlock Text="Open Plan Viewer" VerticalAlignment="Center"/>
+                        </StackPanel>
+                    </Button>
                     <Separator Margin="0,0,0,8"/>
                     <Button x:Name="RefreshAllButton"
                             Content="&#x21BB; Refresh All Status"