fix(chat): sync quick settings state and stabilize thinking toggle

Synchronize useUiPreferences instances via custom sync events and storage listeners so Quick Settings updates apply across UI consumers immediately.

Also hide standalone thinking messages when showThinking is disabled, while preserving hook order to avoid Rendered fewer hooks runtime errors.

src/components/chat/view/subcomponents/MessageComponent.tsx

@@ -86,6 +86,11 @@ const MessageComponent = memo(({ message, index, prevMessage, createDiff, onFile
   }, [autoExpandTools, isExpanded, message.isToolUse]);
 
   const formattedTime = useMemo(() => new Date(message.timestamp).toLocaleTimeString(), [message.timestamp]);
+  const shouldHideThinkingMessage = Boolean(message.isThinking && !showThinking);
+
+  if (shouldHideThinkingMessage) {
+    return null;
+  }
 
   return (
     <div