feat(mission-control): rename sessions inline in the Recent sessions flyout

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

tests/ClaudeDo.Ui.Tests/ViewModels/MissionControlViewModelTests.cs

@@ -59,6 +59,55 @@ public class MissionControlViewModelTests : IDisposable
             rows);
     }
 
+    private async Task<MissionControlViewModel> BuildVmWithSessionAsync(string title)
+    {
+        await using (var ctx = NewContext())
+        {
+            ctx.MissionControlSessions.Add(new MissionControlSessionEntity
+            {
+                SessionId = "s1", Cwd = "c", Title = title, StartedAt = DateTime.UtcNow,
+            });
+            await ctx.SaveChangesAsync();
+        }
+        var vm = BuildVm(new FakeWorker());
+        await vm.RefreshRecentSessionsAsync();
+        return vm;
+    }
+
+    [Fact]
+    public async Task RenameSession_PersistsAndSurvivesRefresh()
+    {
+        using var vm = await BuildVmWithSessionAsync("mika.kuns");
+        var row = vm.RecentSessions.Single();
+
+        row.BeginEdit();
+        row.EditText = "  Fix login  ";
+        await vm.RenameSessionAsync(row);
+
+        Assert.Equal("Fix login", row.Title);
+        Assert.False(row.IsEditing);
+        await vm.RefreshRecentSessionsAsync();
+        Assert.Equal("Fix login", vm.RecentSessions.Single().Title);
+    }
+
+    [Theory]
+    [InlineData("")]
+    [InlineData("   ")]
+    [InlineData("mika.kuns")]
+    public async Task RenameSession_IgnoresEmptyOrUnchangedInput(string input)
+    {
+        using var vm = await BuildVmWithSessionAsync("mika.kuns");
+        var row = vm.RecentSessions.Single();
+
+        row.BeginEdit();
+        row.EditText = input;
+        await vm.RenameSessionAsync(row);
+
+        Assert.Equal("mika.kuns", row.Title);
+        await vm.RefreshRecentSessionsAsync();
+        Assert.Equal("mika.kuns", vm.RecentSessions.Single().Title);
+    }
+
     // Gates the title/list-name DB lookup behind a manually-released TaskCompletionSource so two
     // overlapping Open*ConPtySessionAsync calls both run their synchronous dedupe-check prefix
     // to completion before either resumes past the DB await. This reproduces the open-path races