Replace MRU auto-open on focus with Ctrl+Space gesture

CHANGELOG.md

@@ -47,6 +47,14 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   (default **10 seconds**; **0** closes immediately), and selecting **Never** turns auto-close
   off entirely.
 
+### Changed
+
+- **MRU suggestions no longer drop down on focus.** The Branch and Solution boxes used to open
+  their recently-used list the moment they were focused — so the window started up looking like it
+  had a list permanently stuck open. The list now appears only when you start typing or summon it
+  with **Ctrl+Space** (when there's history to show). The list also keeps the **10** most recent
+  entries per field (was 12).
+
 ### Fixed
 
 - **The chooser dialog is now fully keyboard-driven.** Up/Down arrows move the highlighted

src/Models/Mru.cs

@@ -9,7 +9,7 @@ namespace Fido.Models;
 public static class Mru
 {
     /// <summary>Most entries kept per list.</summary>
-    public const int MaxItems = 12;
+    public const int MaxItems = 10;
 
     /// <summary>
     /// Promotes <paramref name="value"/> to the front, removing any earlier (case-insensitive)

src/Views/MainWindow.axaml

@@ -4,8 +4,8 @@
         xmlns:sys="using:System"
         x:Class="Fido.Views.MainWindow"
         x:DataType="vm:MainWindowViewModel"
-        Width="600" Height="680"
-        MinWidth="520" MinHeight="520"
+        Width="600" Height="780"
+        MinWidth="520" MinHeight="560"
         WindowStartupLocation="CenterScreen"
         Icon="/Assets/fido-icon-256.png"
         Title="Fido"
@@ -40,8 +40,7 @@
                 <AutoCompleteBox x:Name="BranchBox" Classes="fido"
                                  Text="{Binding BranchName, Mode=TwoWay}"
                                  ItemsSource="{Binding RecentBranches}"
-                                 FilterMode="Contains" MinimumPrefixLength="0"
-                                 GotFocus="OnMruGotFocus">
+                                 FilterMode="Contains" MinimumPrefixLength="0">
                     <AutoCompleteBox.ItemTemplate>
                         <DataTemplate x:DataType="sys:String">
                             <Grid ColumnDefinitions="*,Auto" Background="Transparent">
@@ -67,7 +66,6 @@
                                  Text="{Binding SolutionName, Mode=TwoWay}"
                                  ItemsSource="{Binding RecentSolutions}"
                                  FilterMode="Contains" MinimumPrefixLength="0"
-                                 GotFocus="OnMruGotFocus"
                                  PlaceholderText="blank → find the branch's folder and list its solutions">
                     <AutoCompleteBox.ItemTemplate>
                         <DataTemplate x:DataType="sys:String">
@@ -172,7 +170,7 @@
                         VerticalAlignment="Center" Margin="8,0,0,0" />
             </Grid>
             <Border Grid.Row="1" Background="{DynamicResource FidoLogBg}" BorderBrush="{DynamicResource FidoLogBorder}"
-                    BorderThickness="1" CornerRadius="8" Padding="15,14" MinHeight="110">
+                    BorderThickness="1" CornerRadius="8" Padding="15,14" MinHeight="190">
                 <ScrollViewer x:Name="LogScroller" VerticalScrollBarVisibility="Auto" HorizontalScrollBarVisibility="Auto">
                     <ItemsControl ItemsSource="{Binding Log}">
                         <ItemsControl.ItemTemplate>

src/Views/MainWindow.axaml.cs

@@ -118,13 +118,6 @@ private void OnEditorShortcutKeyDown(object? sender, KeyEventArgs e)
         _ => null,
     };
 
-    // Surface the MRU suggestions as soon as a field is focused — but only when there's history to show.
-    private void OnMruGotFocus(object? sender, FocusChangedEventArgs e)
-    {
-        if (sender is AutoCompleteBox { ItemsSource: ICollection { Count: > 0 } } box)
-            Dispatcher.UIThread.Post(() => box.IsDropDownOpen = true);
-    }
-
     /// <summary>Promotes the entered branch/solution to the front of the MRU lists and persists them.</summary>
     private void RecordMru(string branch, string solution)
     {
@@ -253,14 +246,30 @@ private sealed record StartupPlan(bool AutoOpen, Editor? Editor, string? Unknown
 
     private async void OnOpenClick(object? sender, RoutedEventArgs e) => await RunOpenAsync();
 
-    // Enter inside the branch/solution boxes opens directly. The AutoCompleteBox eats the first
-    // Enter just to close its MRU drop-down, so without this a pasted branch needs a second Enter
-    // to act. Close the drop-down, swallow the key so the default button can't also fire, then run
-    // the open flow — collapsing it back to a single press. Posted so any pending selection/binding
-    // settles before RunOpenAsync reads the branch name.
+    // Key handling for the branch/solution boxes.
+    //
+    // Ctrl+Space summons the MRU suggestions on demand. The boxes no longer drop the list down on
+    // focus (it looked permanently stuck open); instead the list appears when the user starts typing
+    // or asks for it with this gesture — but only when there's history to show.
+    //
+    // Enter opens directly. The AutoCompleteBox eats the first Enter just to close its MRU drop-down,
+    // so without this a pasted branch needs a second Enter to act. Close the drop-down, swallow the
+    // key so the default button can't also fire, then run the open flow — collapsing it back to a
+    // single press. Posted so any pending selection/binding settles before RunOpenAsync reads the
+    // branch name.
     private void OnInputBoxKeyDown(object? sender, KeyEventArgs e)
     {
-        if (e.Key != Key.Enter || sender is not AutoCompleteBox box) return;
+        if (sender is not AutoCompleteBox box) return;
+
+        if (e.Key == Key.Space && e.KeyModifiers == KeyModifiers.Control)
+        {
+            if (box.ItemsSource is not ICollection { Count: > 0 }) return;
+            e.Handled = true;
+            box.IsDropDownOpen = true;
+            return;
+        }
+
+        if (e.Key != Key.Enter) return;
         box.IsDropDownOpen = false;
         e.Handled = true;
         Dispatcher.UIThread.Post(() => _ = RunOpenAsync(), DispatcherPriority.Input);

tests/Fido.Tests/E2E/StartupAndValidationTests.cs

@@ -419,10 +419,16 @@ await Harness.WithWindow(services, async window =>
             window.SetText("BranchBox", "main");
             window.SetText("SolutionBox", "Foo");
 
-            // Focusing the box surfaces the MRU drop-down (OnMruGotFocus) — the state the user is
-            // in when they hit Enter. Assert it's actually showing so we exercise the real swallow.
+            // Ctrl+Space summons the MRU drop-down (the boxes no longer open it on focus) — the
+            // state the user is in when they hit Enter. Assert it's showing so we exercise the swallow.
             var box = window.FindControl<AutoCompleteBox>("BranchBox")!;
             box.Focus();
+            box.RaiseEvent(new KeyEventArgs
+            {
+                RoutedEvent = InputElement.KeyDownEvent,
+                Key = Key.Space,
+                KeyModifiers = KeyModifiers.Control,
+            });
             UiTestExtensions.Pump();
             await Assert.That(box.IsDropDownOpen).IsTrue();