toBase64 stack overflow on large inputs (e.g. image uploads) in non-Node environments

[Emeenent14]

Summary

The toBase64 utility in src/internal/utils/base64.ts crashes with a "Maximum call stack size exceeded" error when processing inputs larger than ~100KB in environments without Node.js Buffer (standard browsers, Cloudflare Workers, etc.).

Reproduction

In a browser or worker:

const large = new Uint8Array(200 * 1024);
toBase64(large); // Crashes with RangeError: Maximum call stack size exceeded

[Emeenent14]

###proposed fix

Implement chunked processing for String.fromCharCode.apply to stay within stack limits.

[darthcoder]

The clue is here "Maximum call stack size exceeded" i would first investigate why the maximum call stack size is being exceeded.... You know that is not a harbinger of glad tidings....