Add self-registration, role management, and department mapping UI

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/pages/Login.tsx

@@ -59,6 +59,12 @@ export function Login() {
             </button>
           </form>
         </div>
+        <p style={{ textAlign: 'center', marginTop: '1rem', fontSize: '0.8rem', color: 'var(--text-muted)' }}>
+          New employee?{' '}
+          <a href="/register" style={{ color: 'var(--gold)', textDecoration: 'none' }}>
+            Register with your Workforce email
+          </a>
+        </p>
       </div>
     </div>
   )