fix(ui): adjust keyboard handling and prevent duplicate view recording

- Fix keyboard avoidance logic in PostDetailScreen and ChatScreen by applying manual keyboard height offsets only on Android, preventing double padding on iOS.
- Prevent multiple view recording calls in TradeDetailScreen by using a ref to track if the view has already been recorded.

src/screens/message/ChatScreen.tsx

@@ -545,7 +545,8 @@ export const ChatScreen: React.FC<ChatScreenProps> = (props) => {
       </View>
 
       {/* 底部区域：输入框 + 面板 */}
-      <View style={{ marginBottom: keyboardHeight > 0 ? keyboardHeight : 0 }}>
+      {/* iOS 由外层 KeyboardAvoidingView(behavior=padding) 处理键盘避让；Android 需要手动推起 */}
+      <View style={{ marginBottom: Platform.OS === 'android' && keyboardHeight > 0 ? keyboardHeight : 0 }}>
         {/* 输入框区域 */}
         <View
           style={[inputWrapperStyle, insets.bottom > 0 && { paddingBottom: insets.bottom }]}