fix(client): restore retail interaction parity

Harden keyboard and camera routing, inventory and vendor interactions, chat/emotes, relog portal flow, and paperdoll rendering. Add retail research, connected gate coverage, and release-gate validation.

tests/AcDream.App.Tests/UI/Layout/OptionsPanelControllerTests.cs

@@ -162,6 +162,22 @@ public sealed class OptionsPanelControllerTests
         Assert.Equal(["flush"], flushes);
     }
 
+    [Fact]
+    public void ShowGameplay_UsesTheSameAuthoredTabStateAsAClick()
+    {
+        ImportedLayout layout = FixtureLoader.LoadOptionsPanelHost();
+        var calls = new List<string>();
+        OptionsPanelController controller = OptionsPanelController.Bind(
+            layout, MakeCallbacks(calls))!;
+        controller.ActivateTabs();
+        controller.TabPanel.SwitchTo(0x10000211u); // Character
+
+        controller.ShowGameplay();
+
+        Assert.True(controller.IsShowingGameplay);
+        Assert.Equal(0x10000212u, controller.TabPanel.ActivePageElementId);
+    }
+
     [Fact]
     public void WholeWindowHide_RevertsCurrentlyActivePage()
     {