feat(04-10): create TemplatesViewModel and TemplatesView

- TemplatesViewModel: list, capture with 5 options, apply, rename, delete, refresh
- TemplatesView: capture section with checkboxes, apply section, template DataGrid
- RenameInputDialog: simple WPF dialog (no Microsoft.VisualBasic dependency)
- Capture/Apply are separate async commands from RunCommand

SharepointToolbox/Views/Tabs/TemplatesView.xaml.cs

@@ -0,0 +1,71 @@
+using System.Windows;
+using System.Windows.Controls;
+
+namespace SharepointToolbox.Views.Tabs;
+
+public partial class TemplatesView : UserControl
+{
+    public TemplatesView(ViewModels.Tabs.TemplatesViewModel viewModel)
+    {
+        InitializeComponent();
+        DataContext = viewModel;
+
+        // Wire rename dialog factory using a simple WPF input dialog
+        viewModel.RenameDialogFactory = currentName =>
+        {
+            var dialog = new RenameInputDialog(currentName) { Owner = Window.GetWindow(this) };
+            return dialog.ShowDialog() == true ? dialog.InputText : null;
+        };
+
+        // Load templates on first display
+        viewModel.RefreshCommand.ExecuteAsync(null);
+    }
+}
+
+/// <summary>
+/// Simple WPF input dialog for renaming templates (replaces Microsoft.VisualBasic.Interaction.InputBox).
+/// </summary>
+internal class RenameInputDialog : Window
+{
+    private readonly TextBox _inputBox;
+
+    public string InputText => _inputBox.Text;
+
+    public RenameInputDialog(string currentName)
+    {
+        Title = "Rename Template";
+        Width = 360;
+        Height = 140;
+        WindowStartupLocation = WindowStartupLocation.CenterOwner;
+        ResizeMode = ResizeMode.NoResize;
+
+        var panel = new StackPanel { Margin = new Thickness(12) };
+        panel.Children.Add(new TextBlock { Text = "Enter new template name:", Margin = new Thickness(0, 0, 0, 6) });
+
+        _inputBox = new TextBox { Text = currentName };
+        _inputBox.SelectAll();
+        _inputBox.Focus();
+        _inputBox.KeyDown += (s, e) =>
+        {
+            if (e.Key == System.Windows.Input.Key.Enter) { DialogResult = true; Close(); }
+            if (e.Key == System.Windows.Input.Key.Escape) { DialogResult = false; Close(); }
+        };
+        panel.Children.Add(_inputBox);
+
+        var buttons = new StackPanel
+        {
+            Orientation = Orientation.Horizontal,
+            HorizontalAlignment = HorizontalAlignment.Right,
+            Margin = new Thickness(0, 10, 0, 0),
+        };
+        var ok = new Button { Content = "OK", Width = 75, Margin = new Thickness(0, 0, 8, 0), IsDefault = true };
+        ok.Click += (s, e) => { DialogResult = true; Close(); };
+        var cancel = new Button { Content = "Cancel", Width = 75, IsCancel = true };
+        cancel.Click += (s, e) => { DialogResult = false; Close(); };
+        buttons.Children.Add(ok);
+        buttons.Children.Add(cancel);
+        panel.Children.Add(buttons);
+
+        Content = panel;
+    }
+}