fix: Fix native themes not working on external editors (#2957) [skip e2e]

packages/mobile/src/Lib/MobileDevice.ts

@@ -38,6 +38,9 @@ import {
   DocumentDirectoryPath,
   DownloadDirectoryPath,
   exists,
+  MainBundlePath,
+  readFile,
+  readFileAssets,
   unlink,
   writeFile,
 } from 'react-native-fs'
@@ -508,6 +511,15 @@ export class MobileDevice implements MobileDeviceInterface {
     }
   }
 
+  async getNativeThemeCSS(identifier: string): Promise<string | undefined> {
+    let path = `Web.bundle/src/web-src/components/assets/${identifier}/index.css`
+    if (Platform.OS === 'ios') {
+      path = `${MainBundlePath}/${path}`
+    }
+    const content = Platform.OS === 'android' ? readFileAssets(path) : readFile(path)
+    return content
+  }
+
   async previewFile(base64: string, filename: string): Promise<boolean> {
     const tempLocation = await this.downloadBase64AsFile(base64, filename, true)