feat(ui): auto-focus tab rename and raise buffer to 512

HellionChat/Ui/ChatLogWindow.cs

@@ -2484,8 +2484,13 @@ public sealed class ChatLogWindow : Window
         var anyChanged = false;
         var tabs = Plugin.Config.Tabs;
 
+        // UI-4: focus the rename field on the frame the context menu opens so
+        // the user can type immediately. Buffer raised 128 -> 512 to match the
+        // settings-tab rename (Ui/SettingsTabs/Tabs.cs) — one name limit, not two.
+        if (ImGui.IsWindowAppearing())
+            ImGui.SetKeyboardFocusHere();
         ImGui.SetNextItemWidth(250f * ImGuiHelpers.GlobalScale);
-        if (ImGui.InputText("##tab-name", ref tab.Name, 128))
+        if (ImGui.InputText("##tab-name", ref tab.Name, 512))
             anyChanged = true;
 
         if (ImGuiUtil.IconButton(FontAwesomeIcon.TrashAlt, tooltip: Language.ChatLog_Tabs_Delete))