Add logout and fixed user specific requirements retrieval

frontend/src/services/authService.ts

@@ -33,7 +33,8 @@ class AuthService {
   }
 
   /**
-   * Logout the current user by clearing the session cookie.
+   * Logout the current user by clearing the session cookie
+   * and redirecting to Keycloak logout to end the SSO session.
    */
   async logout(): Promise<void> {
     try {
@@ -48,6 +49,13 @@ class AuthService {
       if (!response.ok) {
         throw new Error(`HTTP error! status: ${response.status}`)
       }
+
+      const data = await response.json()
+      
+      // Redirect to Keycloak logout URL to end the SSO session
+      if (data.logout_url) {
+        window.location.href = data.logout_url
+      }
     } catch (error) {
       console.error('Logout failed:', error)
       throw error