feat: handle ios safari keyboard

frontend/src/utils/iosKeyboardFix.js

@@ -0,0 +1,23 @@
+export function initIOSKeyboardFix() {
+  if (typeof window === 'undefined' || !window.visualViewport) return;
+
+  const ua = navigator.userAgent || '';
+  const isIOS = /iP(ad|hone|od)/.test(ua);
+  if (!isIOS) return;
+
+  const viewport = window.visualViewport;
+  const adjustScroll = () => {
+    window.scrollTo(0, viewport.offsetTop);
+  };
+
+  viewport.addEventListener('resize', adjustScroll);
+  viewport.addEventListener('scroll', adjustScroll);
+
+  let lastScrollY = 0;
+  document.addEventListener('focusin', () => {
+    lastScrollY = window.scrollY;
+  });
+  document.addEventListener('focusout', () => {
+    window.scrollTo(0, lastScrollY);
+  });
+}