Handle MsalRuntime Error Surfacing

[Ugonnaak1]

Aimed to solve the problem discussed here:
Solution 5 implementation

[Copilot]

Pull Request Overview

This PR enhances error handling for MSAL Runtime (native broker) errors by introducing a new NativeAuthError class and attaching it to wrapped MSAL.js errors. The key purpose is to preserve detailed broker error information (status code, tag) when native broker errors are converted to standard MSAL errors.

Key changes:

• Introduces NativeAuthError class in msal-common to preserve broker-specific error details (status code and tag)
• Adds msalNodeRuntimeError property to AuthError base class to hold the original native error
• Modifies error wrapping logic in NativeBrokerPlugin to attach NativeAuthError instances to all wrapped errors

Reviewed Changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
lib/msal-common/src/exports-common.ts	Exports the new NativeAuthError class from msal-common package
lib/msal-common/src/error/NativeAuthError.ts	Defines new error class that extends AuthError with broker-specific properties (statusCode, tag)
lib/msal-common/src/error/AuthError.ts	Adds optional msalNodeRuntimeError property to store the original native broker error
extensions/msal-node-extensions/src/broker/NativeBrokerPlugin.ts	Refactors error wrapping to create NativeAuthError once and attach it to all wrapped errors via msalNodeRuntimeError property
extensions/msal-node-extensions/test/broker/NativeBrokerPlugin.spec.ts	Adds test to verify msalNodeRuntimeError is properly attached to wrapped errors