# Introduction
Avoid having multiple `isDefined` definition across our pacakges
Also avoid importing `isDefined` from `twenty-ui` which exposes a huge
barrel for a such little util function
## In a nutshell
Removed own `isDefined.ts` definition from `twenty-ui` `twenty-front`
and `twenty-server` to move it to `twenty-shared`.
Updated imports for each packages, and added explicit dependencies to
`twenty-shared` if not already in place
Related PR https://github.com/twentyhq/twenty/pull/9941
Replaced string-based feature flag keys with the typed FeatureFlagKey
enum across the admin panel module and related front-end hooks. This
ensures stronger type safety, reduces potential errors, and improves
consistency in handling feature flags.
## Summary
- [x] Remove defaultWorkspace in user
- [x] Remove all occurrence of defaultWorkspace and defaultWorkspaceId
- [x] Improve activate workspace flow
- [x] Improve security on social login
- [x] Add `ImpersonateGuard`
- [x] Allow to use impersonation with couple `User/Workspace`
- [x] Prevent unexpected reload on activate workspace
- [x] Scope login token with workspaceId
Fix https://github.com/twentyhq/twenty/issues/9033#event-15714863042
## Summary
This Pull Request centralizes the redirection logic by introducing a
reusable `useRedirect` hook, which replaces direct usage of
`window.location.href` with more standardized and testable functionality
across multiple modules.
- Introduced a new `useRedirect` hook for handling redirection logic
with optional controlled delays.
- Refactored redirection implementations in various modules (`useAuth`,
workspace, and settings-related hooks, etc.) to use the newly introduced
`useRedirect` or related high-level hooks.
- Updated API and documentation to include or improve support for SSO,
particularly OIDC and SAML setup processes in server logic.
- Enhanced frontend and backend configurability with new environment
variable settings for SSO.
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Co-authored-by: Félix Malfait <felix@twenty.com>
