Use System WebView for YouTube Music Sign-in

[NarwhalPrince]

Checklist

• I've checked that there is no other issue about this feature request.
• This issue contains only one feature request.
• The title of this issue accurately describes the feature request.

Feature description

Currently, InnerTune uses its own embedded WebView for signing into YouTube Music. I request that the app instead use the system WebView (or default browser) for authentication.

This could be implemented by defaulting to the system WebView. Opening the sign-in flow in the user’s default browser offers a more seamless experience.

Why do you want this feature?

The current implementation of an in-app WebView for sign-in has security and usability drawbacks.

1. Using a separate WebView means authentication is handled within the app, increasing the attack surface and potentially exposing login credentials. The system WebView benefits from frequent security updates and sandboxing.
2. Many password managers cannot autofill credentials or passkeys in embedded WebViews, making sign-in more cumbersome.
3. Modern apps increasingly use the system WebView for authentication to ensure security and compatibility.

Additional information

No response