fix: resolve AES-GCM Web Crypto interop failure in Pyodide worker

[Shubhashish-Chakraborty]

Problem

All encrypt_aes and decrypt_aes calls were failing with NotSupportedError: Unrecognized key import algorithm "undefined". This leads to user registration failure. Previously this issue was already addressed in #27 and PR was merged but after a further commit 8ac4409... , this reintroduced the AES bug.

Root Cause

In Pyodide, passing a bare Python dict to js.crypto.subtle APIs does not produce a plain JS object. Without an explicit converter, to_js({"name": "AES-GCM"}) produces a JS Map. The Web Crypto API reads algorithm parameters via dot-notation (e.g. algo.name), which returns undefined on a Map, and hence the error.

The previous correct fix used dict_converter=js.Object.fromEntries. Commit 8ac4409 removed that, leaving raw Python dicts and rebreaking everything.

FIx

Replaced all three algorithm parameter constructions in _import_aes_key, encrypt_aes, and decrypt_aes with js.Object.new() instances, setting .name and .iv as explicit JS properties.

Aditionally:

I've added _JsObject and _JsObjectClass stubs so that js.Object.new() works in the test environment.

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Reviewing files that changed from the base of the PR and between 2b843c2 and 39c70e0.

📒 Files selected for processing (2)

• src/worker.py
• tests/conftest.py

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[Shubhashish-Chakraborty]

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[Shubhashish-Chakraborty]

Fixed