Pixiportal

As an administrator, I want to consult a user's effective permissions, so that I can verify the access rights granted to the user.

Acceptance Criteria:
- Scenario 1: View user roles and permissions
Given a user has assigned roles
When the administrator accesses the user's authorization details
Then the system displays:
Assigned applications
Assigned roles
Effective permissions.

- Scenario 2: Calculate effective permissions:
Given a user has assigned roles and possible permission customizations
When the system determines the user's access rights
Then the system calculates permissions based on:
Permissions provided by assigned roles
Additional permissions granted to the user
Permissions removed from the user's assignment.