Restore pop-out exclusivity: hide popped tabs from main window + keybind/unread parity

HellionChat/Ui/Components/Sidebar.cs

@@ -134,7 +134,10 @@ internal sealed class Sidebar
         // the tab list itself stays untouched and every row keeps its
         // ORIGINAL list index for PushID, so an open context-menu popup
         // stays bound to its tab when sectioning moves it visually.
-        var renderOrder = BuildRenderOrder(tabs);
+        var renderOrder = TabLifecycleHelpers.BuildRenderOrder(
+            tabs,
+            t => _pool.IsOpen(t.Identifier)
+        );
         var pinnedHeaderRendered = false;
         var unpinnedHeaderRendered = false;
         foreach (var i in renderOrder)
@@ -186,30 +189,6 @@ internal sealed class Sidebar
         LastDrawnSectionHeaderCount++;
     }
 
-    // Mirror of 1.5.6's BuildSidebarRenderOrder: returns indices into the
-    // live tab list grouped by section, so the list order itself is never
-    // mutated and headers gate on the first tab actually reached per pool
-    // (an empty pool draws neither separator nor header).
-    private static List<int> BuildRenderOrder(IList<Tab> tabs)
-    {
-        var persistent = new List<int>(tabs.Count);
-        var pinned = new List<int>();
-        var unpinned = new List<int>();
-        for (var i = 0; i < tabs.Count; i++)
-        {
-            if (TabLifecycleHelpers.IsInPinnedPool(tabs[i]))
-                pinned.Add(i);
-            else if (TabLifecycleHelpers.IsInUnpinnedPool(tabs[i]))
-                unpinned.Add(i);
-            else
-                persistent.Add(i);
-        }
-
-        persistent.AddRange(pinned);
-        persistent.AddRange(unpinned);
-        return persistent;
-    }
-
     private void DrawRow(
         Tab tab,
         int index,

HellionChat/Ui/Components/TopTabBar.cs

@@ -18,11 +18,18 @@ internal sealed class TopTabBar
 
     public void Draw(IList<Tab> tabs, ref Tab? activeTab)
     {
+        var firstDrawn = true;
         for (var i = 0; i < tabs.Count; i++)
         {
             var tab = tabs[i];
-            if (i > 0)
+            // POP-1b: a popped-out tab is owned by its pop-out window, not the main
+            // strip (1.5.6 exclusivity). Gate on the pool, not Tab.PopOut (stale flag).
+            if (_pool.IsOpen(tab.Identifier))
+                continue;
+
+            if (!firstDrawn)
                 ImGui.SameLine();
+            firstDrawn = false;
 
             var selected = ReferenceEquals(tab, activeTab);
             // Size the selectable to its own label width. A zero width makes ImGui

HellionChat/Ui/Windows/ChannelPopoutWindow.cs

@@ -111,6 +111,11 @@ internal sealed class ChannelPopoutWindow : Window, IFocusableChatWindow
         if (Bound is null)
             return;
 
+        // POP-1f: the bound tab is live-visible in this pop-out, so it carries no
+        // unread badge — mirror MainWindow's per-frame zero for the active tab.
+        // View-state reset only (tab.Messages store is untouched).
+        Bound.Unread = 0;
+
         var inputHeight = InputBar.Height;
         using (
             var body = ImRaii.Child(

HellionChat/Ui/Windows/MainWindow.cs

@@ -30,6 +30,7 @@ internal sealed class MainWindow : Window, IFocusableChatWindow
     private readonly Components.InputBar _input;
     private readonly Components.StatusBar _status;
     private readonly Lender<PayloadHandler> _handlerLender;
+    private readonly ChannelPopoutPool _pool;
 
     private Tab? _activeTab;
 
@@ -51,7 +52,8 @@ internal sealed class MainWindow : Window, IFocusableChatWindow
         Components.MessageList messages,
         Components.InputBar input,
         Components.StatusBar status,
-        Lender<PayloadHandler> handlerLender
+        Lender<PayloadHandler> handlerLender,
+        ChannelPopoutPool pool
     )
         : base($"{Plugin.PluginName}###hellion-main")
     {
@@ -62,6 +64,7 @@ internal sealed class MainWindow : Window, IFocusableChatWindow
         _input = input;
         _status = status;
         _handlerLender = handlerLender;
+        _pool = pool;
 
         Size = new Vector2(DefaultWidth, DefaultHeight);
         SizeCondition = ImGuiCond.FirstUseEver;
@@ -176,7 +179,13 @@ internal sealed class MainWindow : Window, IFocusableChatWindow
         if (idx < 0)
             idx = 0; // active tab not in the list (mid-strip) -> start from the first
 
-        ActivateTab(tabs[TabLifecycleHelpers.WrapTabIndex(idx, delta, tabs.Count)]);
+        var nextIndex = TabLifecycleHelpers.NextMainTabIndex(
+            idx,
+            delta,
+            tabs,
+            t => _pool.IsOpen(t.Identifier)
+        );
+        ActivateTab(tabs[nextIndex]);
     }
 
     // Internal accessors for self-tests so the probes can reach the live
@@ -270,6 +279,25 @@ internal sealed class MainWindow : Window, IFocusableChatWindow
                 TabLifecycleHelpers.OnTabActivated(reseed, active);
         }
 
+        // POP-1c: a popped-out tab must not stay the main window's active surface
+        // (1.5.6 exclusivity). Re-anchor to the first non-popped tab the moment the
+        // active one is popped; null when every tab is popped (POP-1d guards Draw).
+        // Runs post-seed, before the sidebar/top-tab draw, so the popped tab never
+        // renders. Idempotent: PickMainActiveTab returns the same reference once
+        // settled, so OnTabActivated fires only on the pop frame.
+        var visibleActive = TabLifecycleHelpers.PickMainActiveTab(
+            _activeTab,
+            Plugin.Config.Tabs,
+            t => _pool.IsOpen(t.Identifier)
+        );
+        if (!ReferenceEquals(visibleActive, _activeTab))
+        {
+            var previousActive = _activeTab;
+            _activeTab = visibleActive;
+            if (visibleActive is not null)
+                TabLifecycleHelpers.OnTabActivated(visibleActive, previousActive);
+        }
+
         // The active tab's messages are on screen, so it carries no unread badge
         // (1.5.6 convention: zero the current tab every frame so the dot only ever
         // shows on tabs you are NOT looking at).
@@ -336,8 +364,8 @@ internal sealed class MainWindow : Window, IFocusableChatWindow
             )
         )
         {
-            if (messages.Success)
-                _messages.Draw(_activeTab!);
+            if (messages.Success && _activeTab is not null)
+                _messages.Draw(_activeTab);
         }
 
         // Inside-mode inline render: measure first so PreviewHeight is fresh