Add a polyfil for dynamic viewport heights on older devices

app/[lang]/providers.tsx

@@ -2,6 +2,9 @@
 
 import { Provider } from "jotai";
 
+import { useDynamicViewportUnits } from "@/hooks/useDynamicViewportUnits";
+
 export default function Providers({ children }: { children: React.ReactNode }) {
+  useDynamicViewportUnits();
   return <Provider>{children}</Provider>;
 }