Add capability for gate app to handle external IdP redirects

[thiva-k]

This pull request introduces significant improvements to the authentication flow, especially for handling OAuth redirects and session management in the Asgardeo React SDK. The changes enhance support for the Asgardeo V2 platform, streamline the embedded sign-in flow, and improve robustness around session and redirect handling. The most important changes are grouped below.

Embedded Sign-In Flow and OAuth Redirect Handling

• Improved detection and handling of OAuth redirect responses in the SignIn component, including storing and clearing relevant data in sessionStorage, and updating the browser URL to remove sensitive parameters after successful authentication. [1] [2] [3]
• Added logic to process OAuth callback parameters (code, state, nonce) and ensure the correct flowId is used, with a ref to prevent duplicate processing.
• Updated form submission to prioritize flowId from payload, fallback to currentFlowId, and handle redirection responses appropriately. [1] [2]

Session and Platform Management

• Enhanced session management by storing platform and baseUrl in sessionStorage during provider initialization, and using these values as fallbacks in the sign-in flow. [1] [2]
• Improved retrieval of sessionDataKey and baseUrl from either URL or sessionStorage, making the flow more resilient to navigation and redirects.

Platform-Specific Authentication Logic

• Updated provider and client logic to distinguish between Asgardeo V2 and earlier platforms, ensuring that V2 flows bypass session checks and are handled with specialized logic. [1] [2] [3]

Error Handling and Type Safety

• Improved error handling and messaging for authentication failures, including runtime errors and sign-in exceptions. [1] [2]

Type and Import Updates

• Added new types and imports to support the embedded sign-in flow V2, such as EmbeddedSignInFlowTypeV2 and EmbeddedSignInFlowResponseV2. [1] [2]

These changes collectively make the authentication flow more robust, secure, and compatible with the latest Asgardeo platform features.

[DonOmalVindula]

Let's add a changeset for the release as well

[asgardeo-github-bot]

🦋 Changeset detected

The changes in this PR will be included in the next version bump.

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