fix(employees): harden permissions UI and access control
- Prevent admins from removing their own minimum module grants (employees, home, office)
- Add session_status check before session regeneration
- Disable submit button and return no_access view for AJAX requests
- Replace fade class with active-only for Bootstrap compatibility
- Update permission toggle selectors to .module-toggle
- Add error_cannot_remove_own_minimum_grant translations for Armenian, Bulgarian, Georgian, Swedish, and Ukrainian
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Signed-off-by: objecttothis <17935339+objecttothis@users.noreply.github.com>