Fixed commit and added comment to explain the changes

src/hooks/useHtmlPaste/index.ts

@@ -1,7 +1,7 @@
 import {useCallback, useEffect} from 'react';
+import {isMobile} from '@libs/Browser';
 import Parser from '@libs/Parser';
 import CONST from '@src/CONST';
-import isMobile from '@src/utils/isMobile';
 import type UseHtmlPaste from './types';
 
 const insertAtCaret = (target: HTMLElement, insertedText: string, maxLength: number) => {
@@ -91,6 +91,10 @@ const useHtmlPaste: UseHtmlPaste = (textInputRef, preHtmlPasteCallback, isActive
     const handlePastePlainText = useCallback(
         (event: ClipboardEvent) => {
             const markdownText = event.clipboardData?.getData('text/plain');
+            // Updated paste logic to address issue #53718
+            // When copying from a chat conversation, the clipboard contains markdown-formatted text.
+            // On desktop web, users have the option to paste as plain text, but this feature is unavailable on mobile web.
+            // A conditional check is added to determine whether to retain markdown or convert it to plain text based on the platform.
             if (markdownText) {
                 const parsedText = isMobile() ? markdownText : Parser.htmlToText(Parser.replace(markdownText));
                 paste(parsedText);