src/DodoSSH.Client.App/Views/KeychainScreen.axaml

@@ -256,7 +256,8 @@
         </Border>
 
         <!-- ============ The table ============ -->
-        <Grid Grid.Column="1" RowDefinitions="Auto,Auto,*" Background="{StaticResource Pane}">
+        <Grid Grid.Column="1" RowDefinitions="Auto,Auto,*" Background="{StaticResource Pane}"
+              Grid.IsSharedSizeScope="True">
 
           <Border Grid.Row="0" Padding="16,0" Height="44"
                   BorderBrush="{StaticResource Border}" BorderThickness="0,0,0,1">
@@ -275,12 +276,24 @@
             item this application stores carries a timestamp; see the file-level remark above and
             docs/design-import-gaps.md.
           -->
-          <Grid Grid.Row="1" ColumnDefinitions="2,3*,1.1*,0.9*,1.2*" Margin="0,10,16,6"
+          <!--
+            VAULT is sized to what is in it, and shared between this heading and every row so the two agree:
+            with one vault no row names one, and a fixed column was a heading over a stripe of nothing.
+          -->
+          <Grid Grid.Row="1" Margin="0,10,16,6"
                 IsVisible="{Binding HasVaultItems}">
+            <Grid.ColumnDefinitions>
+              <ColumnDefinition Width="2" />
+              <ColumnDefinition Width="3*" />
+              <ColumnDefinition Width="1.1*" />
+              <ColumnDefinition Width="Auto" SharedSizeGroup="KeychainVault" />
+              <ColumnDefinition Width="1.2*" />
+            </Grid.ColumnDefinitions>
             <TextBlock Grid.Column="1" Classes="label" Text="NAME" FontSize="9.5" LetterSpacing="1"
                        Margin="12,0,8,0" />
             <TextBlock Grid.Column="2" Classes="label" Text="TYPE" FontSize="9.5" LetterSpacing="1" />
-            <TextBlock Grid.Column="3" Classes="label" Text="VAULT" FontSize="9.5" LetterSpacing="1" />
+            <TextBlock Grid.Column="3" Classes="label" Text="VAULT" FontSize="9.5" LetterSpacing="1"
+                       Margin="0,0,16,0" IsVisible="{Binding ShowsVaultColumn}" />
             <TextBlock Grid.Column="4" Classes="label" Text="USED BY" FontSize="9.5" LetterSpacing="1" />
           </Grid>
 
@@ -290,7 +303,14 @@
                    Margin="8,0,8,10">
             <ListBox.ItemTemplate>
               <DataTemplate x:DataType="vm:VaultItemRowViewModel">
-                <Grid ColumnDefinitions="2,3*,1.1*,0.9*,1.2*" Height="40" Margin="6,0,10,0">
+                <Grid Height="40" Margin="6,0,10,0">
+                  <Grid.ColumnDefinitions>
+                    <ColumnDefinition Width="2" />
+                    <ColumnDefinition Width="3*" />
+                    <ColumnDefinition Width="1.1*" />
+                    <ColumnDefinition Width="Auto" SharedSizeGroup="KeychainVault" />
+                    <ColumnDefinition Width="1.2*" />
+                  </Grid.ColumnDefinitions>
                   <!--
                     A Grid rather than a horizontal StackPanel: the StackPanel measured the name with infinite
                     width, so TextTrimming never fired and a long name printed over the TYPE and USED BY
@@ -307,7 +327,7 @@
                   <TextBlock Grid.Column="2" Classes="mono" Text="{Binding Type}" FontSize="10.5"
                              Foreground="{StaticResource TextGhost}" VerticalAlignment="Center"
                              TextTrimming="CharacterEllipsis" />
-                  <Border Grid.Column="3" Classes="chip" HorizontalAlignment="Left"
+                  <Border Grid.Column="3" Classes="chip" HorizontalAlignment="Left" Margin="0,0,16,0"
                           VerticalAlignment="Center" IsVisible="{Binding HasVaultBadge}">
                     <TextBlock Text="{Binding VaultBadge}" FontSize="10" />
                   </Border>

src/DodoSSH.Client.App/Views/SettingsTagsPage.axaml

@@ -81,11 +81,15 @@
               IsVisible="{Binding Vault, Converter={x:Static ObjectConverters.IsNotNull}}">
         <StackPanel>
 
-          <Grid ColumnDefinitions="1.4*,*,*,Auto" Margin="20,14,20,10">
+          <!--
+            No VAULT column, although the design draws one: TagRowViewModel does not carry which vault a tag
+            lives in (tags are read from the active vault alone; see VaultViewModel.NewTag's own remark), so
+            the column was a heading over nothing on every row.
+          -->
+          <Grid ColumnDefinitions="1.4*,2*,Auto" Margin="20,14,20,10">
             <TextBlock Grid.Column="0" Classes="label" Text="TAG" />
             <TextBlock Grid.Column="1" Classes="label" Text="USED BY" />
-            <TextBlock Grid.Column="2" Classes="label" Text="VAULT" />
+            <TextBlock Grid.Column="2" Classes="label" Text=" " />
-            <TextBlock Grid.Column="3" Classes="label" Text=" " />
           </Grid>
 
           <ItemsControl ItemsSource="{Binding Vault.Tags}">
@@ -97,7 +101,7 @@
             <ItemsControl.ItemTemplate>
               <DataTemplate x:DataType="vm:TagRowViewModel">
                 <Border Classes="settingsrow last" Padding="20,10">
-                  <Grid ColumnDefinitions="1.4*,*,*,Auto">
+                  <Grid ColumnDefinitions="1.4*,2*,Auto">
 
                     <Border Grid.Column="0" Classes="chip" HorizontalAlignment="Left" VerticalAlignment="Center">
                       <TextBlock Text="{Binding Label}" />
@@ -107,14 +111,7 @@
                                Foreground="{StaticResource TextFaint}" VerticalAlignment="Center"
                                Text="{Binding Description}" />
 
-                    <!--
+                    <StackPanel Grid.Column="2" Orientation="Horizontal" Spacing="8" VerticalAlignment="Center">
-                      No vault chip here — unlike a group, TagRowViewModel does not carry which vault it lives
-                      in (tags are read from the active vault alone; see VaultViewModel.NewTag's own remark),
-                      so there is no second vault this column could honestly name.
-                    -->
-                    <TextBlock Grid.Column="2" />
-
-                    <StackPanel Grid.Column="3" Orientation="Horizontal" Spacing="8" VerticalAlignment="Center">
                       <Button Classes="paneicon" Width="30" Height="30" FontSize="13"
                               Command="{Binding #Root.((vm:MainWindowViewModel)DataContext).Vault.EditTagRowCommand}"
                               CommandParameter="{Binding}" ToolTip.Tip="Rename this tag.">

src/DodoSSH.Client.App/Views/SnippetsScreen.axaml

@@ -167,8 +167,12 @@
                      TextAlignment="Center" MaxWidth="360"
                      IsVisible="{Binding !HasVisible}" />
 
+          <!--
+            Only with a snippet chosen. Three greyed buttons under a list nobody has clicked in read as
+            something broken rather than something waiting, and the pane on the right already says what to do.
+          -->
           <Border Grid.Row="1" Padding="16,10" BorderBrush="{StaticResource BorderSubtle}"
-                  BorderThickness="0,1,0,0">
+                  BorderThickness="0,1,0,0" IsVisible="{Binding HasSelection}">
             <StackPanel Orientation="Horizontal" Spacing="8">
               <Button Classes="ghost" Content="Edit" Command="{Binding EditCommand}"
                       IsEnabled="{Binding HasSelection}" />

src/DodoSSH.Client.Shell/ViewModels/VaultViewModel.cs

@@ -2404,6 +2404,14 @@ internal sealed partial class VaultViewModel(
 
     internal bool HasVaultItems => VaultItems.Count > 0;
 
+    /// <summary>Whether any row in the keychain table names a vault, which is whether its VAULT column has a heading.</summary>
+    /// <remarks>
+    /// Read off the rows rather than off how many vaults there are, because a row's badge is what the column
+    /// holds: the two agree today — see <see cref="VaultItemRowViewModel.VaultBadge"/> — and if they ever stop
+    /// agreeing, a heading over nothing is the thing this exists to avoid.
+    /// </remarks>
+    internal bool ShowsVaultColumn => VaultItems.Any(row => row.HasVaultBadge);
+
     internal bool HasSelectedVaultItem => SelectedVaultItem is not null;
 
     /// <summary>
@@ -13457,6 +13465,16 @@ internal sealed partial class VaultViewModel(
         };
     }
 
+    /// <summary>Re-reads what the keychain table says about its rows as a whole.</summary>
+    private void RaiseVaultItemFacts()
+    {
+        OnPropertyChanged(nameof(SectionSummary));
+        OnPropertyChanged(nameof(HasVaultItems));
+        OnPropertyChanged(nameof(ShowsVaultColumn));
+        OnPropertyChanged(nameof(TotalItemCount));
+        OnPropertyChanged(nameof(EmptySectionMessage));
+    }
+
     /// <summary>── v5b ── Narrows <see cref="VaultItems"/> to rows <see cref="ItemFilter"/> matches.</summary>
     /// <remarks>
     /// Its own method for the reason <see cref="AddTagRows"/> is out of <see cref="RebuildVaultItems"/> —
@@ -13552,10 +13570,7 @@ internal sealed partial class VaultViewModel(
         // sync every minute would otherwise move the detail pane out from under whoever was reading it.
         SelectedVaultItem = VaultItems.FirstOrDefault(row => row.EntityId == selectedId);
 
-        OnPropertyChanged(nameof(SectionSummary));
+        RaiseVaultItemFacts();
-        OnPropertyChanged(nameof(HasVaultItems));
-        OnPropertyChanged(nameof(TotalItemCount));
-        OnPropertyChanged(nameof(EmptySectionMessage));
 
         // A reload replaces every row object, and the selection is restored by id — so the setter above may
         // not have fired even though the row this answers about is a different instance. Asked again here,

tests/DodoSSH.Client.App.Layout.Tests/ScreenLayoutTests.cs

@@ -2296,6 +2296,66 @@ public sealed class ScreenLayoutTests : IAsyncLifetime
             },
             Token);
 
+    /// <remarks>
+    /// Three greyed buttons under a list nobody has clicked in read as something broken rather than something
+    /// waiting. The row appears with a snippet to act on, and goes with it.
+    /// </remarks>
+    [Fact]
+    public async Task TheSnippetButtonsAppearWithASnippetToActOn()
+    {
+        await SeedSnippetsAsync();
+
+        var snippets = NewSnippetsScreen();
+
+        await LayoutHarness.OnTheUiThreadAsync(
+            () =>
+            {
+                var screen = new SnippetsScreen { DataContext = snippets };
+
+                var window = LayoutHarness.HostAtMinimumSize(
+                    screen, LayoutHarness.ScreenWidth, LayoutHarness.ScreenHeight);
+
+                try
+                {
+                    var edit = screen.GetVisualDescendants().OfType<Button>()
+                        .Single(button => button.Content is "Edit");
+
+                    snippets.Selected = null;
+                    LayoutHarness.Settle(window, LayoutHarness.ScreenWidth, LayoutHarness.ScreenHeight);
+                    edit.IsEffectivelyVisible.ShouldBeFalse("nothing is chosen for it to edit");
+
+                    snippets.Selected = snippets.Visible.First();
+                    LayoutHarness.Settle(window, LayoutHarness.ScreenWidth, LayoutHarness.ScreenHeight);
+                    edit.IsEffectivelyVisible.ShouldBeTrue();
+                }
+                finally
+                {
+                    window.Close();
+                }
+            },
+            Token);
+    }
+
+    /// <remarks>
+    /// With one vault no row names one, and a fixed VAULT column was a heading over a stripe of nothing
+    /// between TYPE and USED BY. It is sized to what its rows hold now, and its heading goes with them.
+    /// </remarks>
+    [Fact]
+    public async Task TheKeychainsVaultColumn_TakesNoRoomWithOneVault()
+    {
+        await OnTheVaultAsync((screen, _) =>
+        {
+            vault.HasVaultItems.ShouldBeTrue("an empty table has no columns to judge");
+            vault.ShowsVaultColumn.ShouldBeFalse("this suite's keychain has one vault");
+
+            var heading = screen.GetVisualDescendants().OfType<TextBlock>()
+                .Single(block => block.Text is "VAULT");
+
+            heading.IsEffectivelyVisible.ShouldBeFalse();
+            heading.Parent.ShouldBeOfType<Grid>().ColumnDefinitions[3].ActualWidth.ShouldBe(0);
+        });
+    }
+
     private SnippetsViewModel NewSnippetsScreen(InsertTarget? target = null) =>
         new(
             vault,