Implement Keycloak authentication integration and unify user management

middleware/authentication.ts

@@ -1,14 +1,34 @@
-export default defineNuxtRouteMiddleware(async () => {
+export default defineNuxtRouteMiddleware(async (to) => {
+  // Skip auth for SSR
+  if (import.meta.server) return;
+
+  // Check if auth is required (default true unless explicitly set to false)
+  const isAuthRequired = to.meta.auth !== false;
+  
+  // Check Keycloak auth first
+  const oidc = useOidc();
+  if (oidc.isLoggedIn) {
+    // User authenticated with Keycloak
+    return;
+  }
+
+  // Fall back to Directus auth
   const { fetchUser, setUser } = useDirectusAuth();
-
-  const user = useDirectusUser();
-
-  if (!user.value) {
+  const directusUser = useDirectusUser();
+  
+  if (!directusUser.value) {
     const user = await fetchUser();
     setUser(user.value);
   }
 
-  if (!user.value) {
-    return navigateTo("/login");
+  if (directusUser.value) {
+    // User authenticated with Directus
+    return;
+  }
+
+  // No authentication found
+  if (isAuthRequired) {
+    // Redirect to login page
+    return navigateTo('/login');
   }
 });