fix: menu button safe-area inset top for iOS PWA black-translucent

webapp/tipitaka-web/src/components/layout/AppShell.tsx

@@ -71,7 +71,8 @@ const AppShell: React.FC = () => {
         {!isNavOpen && (
           <button
             onClick={toggleNav}
-            className={`fixed top-4 left-4 z-30 w-10 h-10 flex items-center justify-center rounded-full ${menuBtn} text-[#c8860a] transition-colors`}
+            style={{ top: 'calc(env(safe-area-inset-top) + 12px)' }}
+            className={`fixed left-4 z-30 w-10 h-10 flex items-center justify-center rounded-full ${menuBtn} text-[#c8860a] transition-colors`}
             title="เปิดเมนู"
           >
             <Menu size={20} />