Fix: subscribe to ItemsChanged before fetching items to avoid missing early events

Agent-Logs-Url: https://github.com/microsoft/PowerToys/sessions/3f380bd3-a56a-4708-80ef-3e7d534c4f6f

Co-authored-by: MuyuanMS <116717757+MuyuanMS@users.noreply.github.com>

src/modules/cmdpal/Microsoft.CmdPal.UI.ViewModels/ContentPageViewModel.cs

@@ -129,8 +129,8 @@ public partial class ContentPageViewModel : PageViewModel, ICommandBarContext
 
         UpdateDetails();
 
-        FetchContent();
         model.ItemsChanged += Model_ItemsChanged;
+        FetchContent();
 
         DoOnUiThread(
         () =>

src/modules/cmdpal/Microsoft.CmdPal.UI.ViewModels/ContentTreeViewModel.cs

@@ -44,9 +44,9 @@ public partial class ContentTreeViewModel(ITreeContent _tree, WeakReference<IPag
             UpdateProperty(nameof(Root));
         }
 
-        FetchContent();
         model.PropChanged += Model_PropChanged;
         model.ItemsChanged += Model_ItemsChanged;
+        FetchContent();
     }
 
     // Theoretically, we should unify this with the one in CommandPalettePageViewModelFactory

src/modules/cmdpal/Microsoft.CmdPal.UI.ViewModels/Dock/DockBandViewModel.cs

@@ -209,8 +209,8 @@ public sealed partial class DockBandViewModel : ExtensionObjectViewModel
         var list = command.Model.Unsafe as IListPage;
         if (list is not null)
         {
-            InitializeFromList(list);
             list.ItemsChanged += HandleItemsChanged;
+            InitializeFromList(list);
         }
         else
         {

src/modules/cmdpal/Microsoft.CmdPal.UI.ViewModels/ListViewModel.cs

@@ -957,8 +957,8 @@ public partial class ListViewModel : PageViewModel, IDisposable
         Filters?.InitializeProperties();
         UpdateProperty(nameof(Filters));
 
-        FetchItems(true);
         model.ItemsChanged += Model_ItemsChanged;
+        FetchItems(true);
     }
 
     private static IGridPropertiesViewModel? LoadGridPropertiesViewModel(IGridProperties? gridProperties)

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

@@ -133,17 +133,7 @@ public sealed partial class MainWindow : WindowEx,
         _keyboardListener = new KeyboardListener();
         _keyboardListener.Start();
 
-        // Dispatch HandleSummon to the UI thread. When UseLowLevelGlobalHotkey is enabled,
-        // this ProcessCommand callback is invoked directly from the WH_KEYBOARD_LL low-level
-        // keyboard hook callback, which is an input-synchronous context. Calling window/WinUI
-        // operations (e.g. ShowWindow, Hide) from that context triggers outgoing COM calls that
-        // COM forbids inside input-sync calls, causing RPC_E_CANTCALLOUT_ININPUTSYNCCALL (0x8001010D).
-        // TryEnqueue posts the work to the UI thread's message queue so it runs after the hook
-        // callback returns, outside the input-sync restriction.
-        // Note: the standard WM_HOTKEY path (HotKeyPrc) already runs on the UI thread's message
-        // pump and does not require this dispatch.
-        _keyboardListener.SetProcessCommand(new CmdPalKeyboardService.ProcessCommand(
-            (id) => DispatcherQueue.TryEnqueue(() => HandleSummon(id))));
+        _keyboardListener.SetProcessCommand(new CmdPalKeyboardService.ProcessCommand(HandleSummon));
 
         WM_TASKBAR_RESTART = PInvoke.RegisterWindowMessage("TaskbarCreated");