Both share modals opened the instagram-stories:// scheme without ever
placing the captured PNG on the pasteboard, so Instagram opened an empty
story. Replace the manual scheme launch with react-native-share
shareSingle(INSTAGRAM_STORIES), which writes the image to UIPasteboard
under com.instagram.sharedSticker.backgroundImage on iOS and uses the
ADD_TO_STORY intent on Android. Gate the flow on the required Facebook
App ID (EXPO_PUBLIC_FACEBOOK_APP_ID) and Instagram being installed, with
fallback to the system share sheet, and remove the dead base64 reads.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Block broad image and video read permissions in Expo config and the checked-in Android manifest. Keep picker access scoped to user-selected media and gallery saves write-only. Add regression coverage and document the release-manifest invariant.
jjbrunton
