Map the picker result to a blob or base64 string before calling upload. A local path like the picker uri is not something the upload API can fetch.

Context: In imagekit-javascript, the upload function accepts binary file data, a base64 string, or a public URL. Passing the whole react-native-image-picker response object, or a local device file path, does not work and you get a broken URL back. The reporter fixed it by extracting the actual file data and passing that instead.

## Matched source
Source: Published skill
Original query: "ImageKit upload takes a file blob, base64, or public URL, not the picker response object"
Key terms: base64, blob, file, imagekit, object, picker, public, response, takes, upload