more refactor

src/lib/devices.ts

@@ -0,0 +1,27 @@
+function isAndroid(): boolean {
+  return (
+    typeof navigator !== 'undefined' && /android/i.test(navigator.userAgent)
+  );
+}
+
+function isSmallIOS(): boolean {
+  return (
+    typeof navigator !== 'undefined' && /iPhone|iPod/.test(navigator.userAgent)
+  );
+}
+
+function isLargeIOS(): boolean {
+  return (
+    typeof navigator !== 'undefined' &&
+    (/iPad/.test(navigator.userAgent) ||
+      (navigator.platform === 'MacIntel' && navigator.maxTouchPoints > 1))
+  );
+}
+
+function isIOS(): boolean {
+  return isSmallIOS() || isLargeIOS();
+}
+
+export function isMobile(): boolean {
+  return isAndroid() || isIOS();
+}

src/lib/localStorage.ts

@@ -0,0 +1,25 @@
+export function setItem<T>(key: string, value: T) {
+  try {
+    localStorage.setItem(key, JSON.stringify(value));
+  } catch (error) {
+    console.warn('Failed to save item:', error);
+  }
+}
+
+export function getItem<T>(key: string): T | null {
+  try {
+    const stored = localStorage.getItem(key);
+    return stored ? JSON.parse(stored) : null;
+  } catch (error) {
+    console.warn('Failed to load item:', error);
+    return null;
+  }
+}
+
+export function removeItem(key: string) {
+  try {
+    localStorage.removeItem(key);
+  } catch (error) {
+    console.warn('Failed to remove item:', error);
+  }
+}