fix: replace buffer decoding with atob (#2808)

Author: gronxb

src/utils/fetchData.ts

@@ -1,5 +1,4 @@
 import { Platform } from 'react-native';
-import { Buffer } from 'buffer';
 
 export async function fetchText(uri?: string): Promise<string | null> {
   if (!uri) {
@@ -17,10 +16,9 @@ export async function fetchText(uri?: string): Promise<string | null> {
 const decodeBase64Image = (uri: string) => {
   const decoded = decodeURIComponent(uri);
   const splitContent = decoded.split(';')[1].split(',');
-  const dataType = splitContent[0] as BufferEncoding;
   const content = splitContent.slice(1).join(',');
 
-  return Buffer.from(content, dataType).toString('utf-8');
+  return atob(content);
 };
 
 function dataUriToXml(uri: string): string | null {