- Added CreateRoleModal for creating new roles
- Added EditRoleModal for editing existing roles
- Added AssignRoleModal for assigning roles to users
- Fixed roleService type issues (roleId from number to string)
- Enhanced RolesPage with create/edit/assign functionality
- Added UI section for assigning roles to users by ID
- Integrated all modals with existing role management
- Added proper form validation and error handling
- Added loading states for all async operations
- Added display of user current roles in assign modal