[Wasm Compatibility] Migrate from dart:js to dart:js_interop

[ArtemRedchych]

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✅ Proposal

To support the future of Flutter Web and enable usage in Wasm builds, aad_oauth (and its transitive dependencies) should:

• Avoid dart:js and dart:js_util
• Migrate to the modern and Wasm-compatible dart:js_interop library
• Optionally use conditional imports to avoid secure storage entirely on platforms where it's unavailable (e.g., Wasm)

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🙏 Request

Would you be open to migrating away from dart:js to dart:js_interop to ensure aad_oauth works in future-ready Flutter Web apps?

Thanks again!
— Artem

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[eric-taix]

May be fixed by #372

[lucavenir]

Full WASM compatibility might be reached once flutter_secure_storage hits v10, since on v9 it still depends on non-WASM libraries. And this package does depend on flutter_secure_storage: ^9.0.

[eric-taix]

See #372

Review is pending

[lucavenir]

nice! I didn't see the PR depends on flutter_secure_storage: ^10.0.0-beta. thanks!