fix: preserve sessions channel selection

Author: steipete

src/OpenClaw.Tray.WinUI/Pages/SessionsPage.xaml.cs

@@ -121,22 +121,31 @@ private void RebuildChannelTabs()
     {
         if (_allSessions == null) return;
 
+        var requestedChannel = _activeChannel;
         var visibleSessions = SessionVisibilityFilter.VisibleSessions(_allSessions, ShowCompletedSessions);
         var channels = visibleSessions
             .Where(s => !string.IsNullOrWhiteSpace(s.Channel))
             .Select(s => s.Channel!)
             .Distinct(StringComparer.OrdinalIgnoreCase)
             .OrderBy(c => c)
             .ToList();
+        var activeChannel = SessionVisibilityFilter.ResolveActiveChannel(requestedChannel, channels);
 
         // Keep "All" tab, clear dynamic tabs
         while (ChannelSelector.Items.Count > 1)
             ChannelSelector.Items.RemoveAt(ChannelSelector.Items.Count - 1);
 
+        SelectorBarItem selectedItem = AllTab;
         foreach (var ch in channels)
         {
-            ChannelSelector.Items.Add(new SelectorBarItem { Text = ch });
+            var item = new SelectorBarItem { Text = ch };
+            ChannelSelector.Items.Add(item);
+            if (string.Equals(ch, activeChannel, StringComparison.OrdinalIgnoreCase))
+                selectedItem = item;
         }
+
+        _activeChannel = activeChannel;
+        selectedItem.IsSelected = true;
     }
 
     private void ApplyFilter()

src/OpenClaw.Tray.WinUI/Services/SessionVisibilityFilter.cs

@@ -19,4 +19,15 @@ public static bool IsCleanCompleted(SessionInfo session)
         return string.Equals(status, "done", StringComparison.OrdinalIgnoreCase)
             || string.Equals(status, "completed", StringComparison.OrdinalIgnoreCase);
     }
+
+    public static string ResolveActiveChannel(string activeChannel, IEnumerable<string> visibleChannels)
+    {
+        if (!string.Equals(activeChannel, "all", StringComparison.OrdinalIgnoreCase)
+            && visibleChannels.Any(channel => string.Equals(channel, activeChannel, StringComparison.OrdinalIgnoreCase)))
+        {
+            return activeChannel;
+        }
+
+        return "all";
+    }
 }

tests/OpenClaw.Tray.Tests/SessionVisibilityFilterTests.cs

@@ -79,4 +79,16 @@ public void VisibleSessions_ShowCompletedPreservesAllSessions()
 
         Assert.Equal(new[] { "done", "failed" }, visible);
     }
+
+    [Theory]
+    [InlineData("all", "all")]
+    [InlineData("Slack", "Slack")]
+    [InlineData("slack", "slack")]
+    [InlineData("missing", "all")]
+    public void ResolveActiveChannel_PreservesOnlyVisibleChannels(string activeChannel, string expected)
+    {
+        var visibleChannels = new[] { "Slack", "WhatsApp" };
+
+        Assert.Equal(expected, SessionVisibilityFilter.ResolveActiveChannel(activeChannel, visibleChannels));
+    }
 }