Create use-mobile.tsx

AppImage/hooks/use-mobile.tsx

@@ -0,0 +1,23 @@
+"use client"
+
+import { useEffect, useState } from "react"
+
+export function useIsMobile() {
+  const [isMobile, setIsMobile] = useState(false)
+
+  useEffect(() => {
+    const checkMobile = () => {
+      setIsMobile(window.innerWidth < 768)
+    }
+
+    // Check on mount
+    checkMobile()
+
+    // Listen for resize
+    window.addEventListener("resize", checkMobile)
+
+    return () => window.removeEventListener("resize", checkMobile)
+  }, [])
+
+  return isMobile
+}