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/home/PostDetailScreen.tsx

@@ -1401,7 +1401,7 @@ export const PostDetailScreen: React.FC = () => {
       {
         paddingHorizontal: responsivePadding,
         paddingVertical: responsiveGap,
-        paddingBottom: keyboardHeight + responsiveGap + insets.bottom,
+        paddingBottom: (Platform.OS === 'android' ? keyboardHeight : 0) + responsiveGap + insets.bottom,
       }
     ]}>
       {/* 回复提示 */}
@@ -1486,6 +1486,8 @@ export const PostDetailScreen: React.FC = () => {
             minHeight={60}
             autoExpand
             style={styles.expandedTextInput}
+            returnKeyType="send"
+            onSubmitEditing={handleSendComment}
           />
 
           {/* Image preview */}