fix(frontend): Login state blijft behouden voor andere tabs binnen dezelfde browser.

frontend/src/App.vue

@@ -3,6 +3,9 @@
     import MenuBar from "@/components/MenuBar.vue";
     import { useRoute } from "vue-router";
     import { computed } from "vue";
+    import authService from "@/services/auth/auth-service.ts";
+
+    void authService.loadUser();
 
     const route = useRoute();
     interface RouteMeta {

frontend/src/main.ts

@@ -12,11 +12,9 @@ import App from "./App.vue";
 import router from "./router";
 import { aliases, mdi } from "vuetify/iconsets/mdi";
 import { VueQueryPlugin, QueryClient } from "@tanstack/vue-query";
-import authService from "./services/auth/auth-service.ts";
 
 const app = createApp(App);
 
-await authService.loadUser();
 app.use(router);
 
 const link = document.createElement("link");

frontend/src/router/index.ts

@@ -138,7 +138,7 @@ const router = createRouter({
 router.beforeEach(async (to, _from, next) => {
     // Verify if user is logged in before accessing certain routes
     if (to.meta.requiresAuth) {
-        if (!authService.isLoggedIn.value) {
+        if (!authService.isLoggedIn.value && !await authService.loadUser()) {
             next("/login");
         } else {
             next();

frontend/src/services/auth/auth-service.ts

@@ -37,7 +37,19 @@ async function loadUser(): Promise<User | null> {
     if (!activeRole) {
         return null;
     }
-    const user = await (await getUserManagers())[activeRole].getUser();
+
+    const userManager = (await getUserManagers())[activeRole];
+    let user = await userManager.getUser(); // Load the user from the local storage.
+    if (!user) { // If the user is not in the local storage, he could still be authenticated in Keycloak.
+        try {
+            user = await userManager.signinSilent()
+        } catch (e: unknown) {
+            // When the user was previously logged in and then logged out, signinSilent throws an error.
+            // In that case, the user is not authenticated anymore, so we set him to null.
+            user = null;
+        }
+    }
+
     setUserAuthInfo(user);
     authState.activeRole = activeRole ?? null;
     return user;