fix bugs

Assets/_Project/Scripts/UI/HUDController.cs

@@ -964,9 +964,12 @@ namespace TD.UI
 
         private VisualElement CreateBuffMenuButton(Key hotkey)
         {
+            // Key.None so HandleHotkeys doesn't register B here — BuilderInputController
+            // already fires ToggleBuffMenu on B globally. Registering it in both places
+            // causes a double-toggle on the same frame when the builder is selected.
             return CreateActionButton(
-                costText: "Buffs",
-                hotkey:   hotkey,
+                costText: "Buffs  [B]",
+                hotkey:   Key.None,
                 onClick:  () => ToggleBuffMenu());
         }