Root cause: RetailWindowOpacityController applied the Default/Active
opacity fade to EVERY registered UiRoot window (vitals, toolbar,
inventory, spellbook, radar, even the Options panel itself), but
retail's ChatInterface::SetDefaultOpacity/SetActiveOpacity are only
ever called by gmMainChatUI/gmFloatyChatUI — the mechanism is chat-only
in retail, not a global window-opacity feature.
Fix: scope the controller's catch-up loop, OnWindowRegistered,
ReapplyAll, and Dispose to WindowNames.Chat/ChatWindow1-4 only; every
other registered window now stays fully opaque regardless of slider
position, matching retail's own scope. Regressed by
RetailWindowOpacityControllerTests.
OpacityFade_AppliesOnlyToChatWindows_NeverOtherPanels (registers
vitals/toolbar/chat/a floating chat window and asserts the non-chat
windows never move off 1.0 while chat windows still track Default/
Active correctly).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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