mobile: fix typed routes - router.push/replace avec objet pathname

typedRoutes=true dans app.json interdit les string literals
Tous les router.push/replace convertis en { pathname } object

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

memento-mobile/app/_layout.tsx

@@ -19,8 +19,8 @@ export default function RootLayout() {
   useEffect(() => {
     if (loading) return
     const inAuth = segments[0] === '(auth)'
-    if (!user && !inAuth) router.replace('/(auth)/login')
-    else if (user && inAuth) router.replace('/(tabs)/home')
+    if (!user && !inAuth) router.replace({ pathname: '/(auth)/login' })
+    else if (user && inAuth) router.replace({ pathname: '/(tabs)/home' })
   }, [user, loading, segments])
 
   if (loading) {