feat(auth): enhance logout process to support RP-Initiated Logout for OIDC users

src/contexts/AuthContext.jsx

@@ -42,7 +42,13 @@ export function AuthProvider({ children }) {
 
   const logout = useCallback(async () => {
     try {
-      await api.post('/auth/logout');
+      const res = await api.post('/auth/logout');
+      localStorage.removeItem('token');
+      setUser(null);
+      if (res.data?.keycloakLogoutUrl) {
+        window.location.href = res.data.keycloakLogoutUrl;
+        return;
+      }
     } catch {
       // ignore — token is removed locally regardless
     }