Merge branch 'claude/main-page-group-hierarchy-3a3210'

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

@@ -233,7 +233,8 @@ public sealed class HostGridTests : IAsyncLifetime
         vault.SelectedGroup = production;
 
         vault.GroupFilter.ShouldBeNull("one press selects a group and does not open it");
-        vault.VisibleHosts.Count.ShouldBe(2, "so the grid still holds the hosts outside it");
+        vault.VisibleHosts.Select(row => row.Label)
+            .ShouldBe(["stage-web"], "so the grid is still the outermost level, and prod-db is inside a group");
         vault.GroupTarget.ShouldBeSameAs(production, "what EDIT and DELETE act on");
         vault.ShowsGroupActions.ShouldBeTrue();
 
@@ -252,7 +253,8 @@ public sealed class HostGridTests : IAsyncLifetime
         // same job and went with the change.
         vault.OpenGroupCommand.Execute(vault.GroupTrail[0].Group);
 
-        vault.VisibleHosts.Count.ShouldBe(2, "ALL HOSTS brings back the hosts outside the group");
+        vault.VisibleHosts.Select(row => row.Label)
+            .ShouldBe(["stage-web"], "ALL HOSTS is the outermost level, not every host in the keychain");
         vault.GroupTarget.ShouldBeNull("and nothing is aimed at once no group is open or selected");
         vault.ShowsGroupActions.ShouldBeFalse("a pair of buttons with no subject is hidden rather than shown");
     }

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

@@ -344,7 +344,10 @@ public sealed class ScreenLayoutTests : IAsyncLifetime
     /// that spans the width is as inside it as a card is.
     /// </para>
     /// <para>
-    /// Measured with every host filed, which is the shape that used to produce the most headings.
+    /// Measured with every host filed and that group open, which is the shape that used to produce the most
+    /// headings. Open, because the grid holds one level of the tree — a host inside a group is drawn inside
+    /// that group and nowhere else — so measuring at the outermost level would be measuring an empty grid.
+    /// See <c>VaultViewModel.Matches</c>.
     /// </para>
     /// </remarks>
     [Fact]
@@ -358,6 +361,8 @@ public sealed class ScreenLayoutTests : IAsyncLifetime
                 new HostGroupMove(host, vault.Groups[0].EntityId));
         }
 
+        vault.OpenGroupCommand.Execute(vault.Groups[0]);
+
         await OnTheHostsScreenAsync((screen, _) =>
         {
             var rows = screen.HostGrid
@@ -370,7 +375,8 @@ public sealed class ScreenLayoutTests : IAsyncLifetime
             rows.ShouldAllBe(row => row is HostRowViewModel);
         });
 
-        await MeasureHostsAsync(faults => faults.ShouldBeEmpty("with three groups and every host filed"));
+        await MeasureHostsAsync(
+            faults => faults.ShouldBeEmpty("with every host filed and the group holding them open"));
     }
 
     /// <remarks>