fix: legacy picker for real photo GPS on Android 13+, watermark shows place + capture datetime

App.tsx

@@ -238,6 +238,14 @@ export default function App() {
       allowsEditing: false,
       quality: 1,
       exif: true,
+      // Android 13+ photo picker always returns a redacted cache copy with
+      // assetId=null — EXIF GPS stripped, MediaStore id lost → photo GPS is
+      // unreachable and we'd stamp the device's location instead. The legacy
+      // picker (ACTION_GET_CONTENT → DocumentsUI) hands back a
+      // com.android.providers.media.documents uri, so the MediaStore asset id
+      // survives AND (with ACCESS_MEDIA_LOCATION granted) the file is not
+      // redacted → tier-1 EXIF / tier-2 MediaStore both work.
+      legacy: Platform.OS === 'android' && useGeotag,
     });
 
     if (!result.canceled && result.assets && result.assets.length > 0) {