* chore: bump version to 2.21.12 and implement safe redirect path validation
- Updated application version from 2.21.11 to 2.21.12 in package.json.
- Introduced `getSafeRedirectPath` and `isSafeRedirectPath` utility functions to validate user-supplied redirect URLs, enhancing security against open redirect attacks.
* fix: address page reload issue in Admin tests for CI
* chore: update project dependencies and documentation for Next.js 16
- Upgraded Next.js from version 15 to 16 across various documentation files and components.
- Updated references to Next.js 16 in AGENTS.md and CLAUDE.md for consistency.
- Incremented application version to 2.21.0 in package.json.
- Refactored identity setup components to improve user experience and added confirmation dialogs for authentication methods.
- Enhanced invitation flow with new logic for handling user redirection and token generation.
* refactor: streamline invitation flow in e2e tests
- Simplified the invitation flow test by using a predefined email instead of generating a random one.
- Removed unnecessary steps such as clearing cookies and reloading the page before user sign-up.
- Enhanced clarity by eliminating commented-out code related to identity verification and user membership checks.
* refactor: improve code readability in IdentitiesPage and UpdatePasswordForm components
- Enhanced formatting of JSX elements in IdentitiesPage and UpdatePasswordForm for better readability.
- Adjusted indentation and line breaks to maintain consistent coding style across components.
* refactor: enhance LinkAccountsList component with user redirection logic
- Updated the LinkAccountsList component to include a redirectToPath option in the useLinkIdentityWithProvider hook for improved user experience.
- Removed redundant user hook declaration to streamline the code structure.
* refactor: update account setup logic in JoinTeamAccountPage
- Introduced a check for email-only authentication support to streamline account setup requirements.
- Adjusted the conditions for determining if a new account should set up additional authentication methods, enhancing user experience for new users.
