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.UI.Abstractions.Tests/Input/InputDispatcherCaptureTests.cs

@@ -12,8 +12,8 @@ namespace AcDream.UI.Abstractions.Tests.Input;
 /// non-modifier chord is reported via the supplied callback and the
 /// dispatcher does NOT fire normal action events for that chord. Esc
 /// cancels capture (callback receives a sentinel <c>default</c> chord).
-/// Modifier-only key transitions don't complete capture — the user can
-/// dial in Shift / Ctrl / Alt before pressing the trigger key.
+/// A modifier key is captured on release when used alone, or remains a
+/// modifier prefix when another key is pressed while it is held.
 /// </summary>
 public class InputDispatcherCaptureTests
 {
@@ -93,6 +93,23 @@ public class InputDispatcherCaptureTests
         Assert.Equal(new KeyChord(Key.A, ModifierMask.Shift | ModifierMask.Ctrl), captured!.Value);
     }
 
+    [Fact]
+    public void BeginCapture_modifier_released_alone_becomes_bare_primary_key()
+    {
+        var (dispatcher, kb, _, _, fired) = Build();
+        KeyChord? captured = null;
+        dispatcher.BeginCapture(chord => captured = chord);
+
+        kb.EmitKeyDown(Key.ShiftLeft, ModifierMask.Shift);
+        Assert.Null(captured);
+        kb.EmitKeyUp(Key.ShiftLeft, ModifierMask.Shift);
+
+        Assert.Equal(
+            new KeyChord(Key.ShiftLeft, ModifierMask.None),
+            captured);
+        Assert.Empty(fired);
+    }
+
     [Fact]
     public void BeginCapture_completes_with_modifier_state()
     {
@@ -106,6 +123,26 @@ public class InputDispatcherCaptureTests
         Assert.Equal(new KeyChord(Key.A, ModifierMask.Ctrl), captured!.Value);
     }
 
+    [Fact]
+    public void BeginCapture_consumes_mouse_button_as_retail_qualified_control()
+    {
+        var (dispatcher, _, mouse, bindings, fired) = Build();
+        var left = new KeyChord(
+            InputDispatcher.MouseButtonToKey(MouseButton.Left),
+            ModifierMask.Ctrl,
+            Device: 1);
+        bindings.Add(new Binding(left, InputAction.ToggleInventoryPanel));
+        mouse.WantCaptureMouse = true;
+
+        KeyChord? captured = null;
+        dispatcher.BeginCapture(chord => captured = chord);
+        mouse.EmitMouseDown(MouseButton.Left, ModifierMask.Ctrl);
+
+        Assert.Equal(left, captured);
+        Assert.False(dispatcher.IsCapturing);
+        Assert.Empty(fired);
+    }
+
     [Fact]
     public void CancelCapture_invokes_callback_with_default_chord_and_clears_state()
     {