CmdPal: Add history to the new run page (#40427)

_⚠️ targets #39955_

This adds history support to the new run page.

* It'll initialize the history with the history from the run dialog, if
there is any.
* Any new commands that are run, or files/dirs that are opened will also
get added to the history
* history will persist across reboots

src/modules/cmdpal/Microsoft.CmdPal.UI/App.xaml.cs

@@ -101,6 +101,7 @@ public partial class App : Application
         var files = new IndexerCommandsProvider();
         files.SuppressFallbackWhen(ShellCommandsProvider.SuppressFileFallbackIf);
         services.AddSingleton<ICommandProvider>(allApps);
+
         services.AddSingleton<ICommandProvider, ShellCommandsProvider>();
         services.AddSingleton<ICommandProvider, CalculatorCommandProvider>();
         services.AddSingleton<ICommandProvider>(files);
@@ -146,6 +147,7 @@ public partial class App : Application
         services.AddSingleton(state);
         services.AddSingleton<IExtensionService, ExtensionService>();
         services.AddSingleton<TrayIconService>();
+        services.AddSingleton<IRunHistoryService, RunHistoryService>();
 
         services.AddSingleton<IRootPageService, PowerToysRootPageService>();
         services.AddSingleton<IAppHostService, PowerToysAppHostService>();

src/modules/cmdpal/Microsoft.CmdPal.UI/Controls/SearchBar.xaml.cs

@@ -336,8 +336,6 @@ public sealed partial class SearchBar : UserControl,
                     // ... Move the cursor to the end of the input
                     FilterBox.Select(FilterBox.Text.Length, 0);
                 }
-
-                // TODO! deal with suggestion
             }
             else if (property == nameof(ListViewModel.InitialSearchText))
             {

src/modules/cmdpal/Microsoft.CmdPal.UI/RunHistoryService.cs

@@ -0,0 +1,50 @@
+// Copyright (c) Microsoft Corporation
+// The Microsoft Corporation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using Microsoft.CmdPal.Common.Services;
+using Microsoft.CmdPal.UI.ViewModels;
+
+namespace Microsoft.CmdPal.UI;
+
+internal sealed class RunHistoryService : IRunHistoryService
+{
+    private readonly AppStateModel _appStateModel;
+
+    public RunHistoryService(AppStateModel appStateModel)
+    {
+        _appStateModel = appStateModel;
+    }
+
+    public IReadOnlyList<string> GetRunHistory()
+    {
+        if (_appStateModel.RunHistory.Count == 0)
+        {
+            var history = Microsoft.Terminal.UI.RunHistory.CreateRunHistory();
+            _appStateModel.RunHistory.AddRange(history);
+        }
+
+        return _appStateModel.RunHistory;
+    }
+
+    public void ClearRunHistory()
+    {
+        _appStateModel.RunHistory.Clear();
+    }
+
+    public void AddRunHistoryItem(string item)
+    {
+        // insert at the beginning of the list
+        if (string.IsNullOrWhiteSpace(item))
+        {
+            return; // Do not add empty or whitespace items
+        }
+
+        _appStateModel.RunHistory.Remove(item);
+
+        // Add the item to the front of the history
+        _appStateModel.RunHistory.Insert(0, item);
+
+        AppStateModel.SaveState(_appStateModel);
+    }
+}