refactor(session): one session store for login, logout and 401

src/App.jsx

@@ -1,6 +1,6 @@
 import {Link, Route, Routes, useLocation, useNavigate} from 'react-router-dom';
 import {useTranslation} from 'react-i18next';
-import {useEffect, useState} from 'react';
+import {useEffect} from 'react';
 
 import LandingPage from './pages/LandingPage';
 import LoginPage from './pages/LoginPage';
@@ -23,26 +23,19 @@ import {Toaster} from '@/components/ui/sonner';
 import {TooltipProvider} from '@/components/ui/tooltip';
 import PageBackground from './components/PageBackground.jsx';
 import {usePreferences} from './context/PreferencesContext.jsx';
-import {useCurrentUserActions} from './context/CurrentUserContext.jsx';
-import {clearSession, hasSession} from './utils/auth.js';
+import {clearSession} from './utils/auth.js';
+import useSession from './hooks/useSession.js';
 import {logout} from './utils/api.js';
 
 function App() {
     const {t} = useTranslation();
-    const [isAuthenticated, setIsAuthenticated] = useState(false);
-    const {appearance, syncPreferences, resetAppearance} = usePreferences();
-    const {setUser} = useCurrentUserActions();
+    const {active: isAuthenticated} = useSession();
+    const {appearance, syncPreferences} = usePreferences();
 
     // Hooks for routing
     const navigate = useNavigate();
     const location = useLocation();
 
-    useEffect(() => {
-        // No local expiry check here: a 401 from the backend ends the session (useSessionExpired), and a browser
-        // clock that runs ahead would otherwise end it silently.
-        setIsAuthenticated(hasSession());
-    }, [location]);
-
     // On login and on page load; the cached look shows until Auth answers.
     useEffect(() => {
         if (isAuthenticated) syncPreferences();
@@ -52,9 +45,6 @@ function App() {
     const handleLogout = async () => {
         await logout();
         clearSession();
-        resetAppearance();
-        setUser(null);
-        setIsAuthenticated(false);
         navigate('/login');
     };