fix: mobile sidebar — cursor-pointer on SheetOverlay (iOS tap-to-close), modal=false prevents body position:fixed layout shift, scrollbar-gutter stable on desktop

src/components/ui/sheet.tsx

@@ -34,7 +34,7 @@ function SheetOverlay({
     <SheetPrimitive.Overlay
       data-slot="sheet-overlay"
       className={cn(
-        "data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0 fixed inset-0 z-50 bg-black/50",
+        "data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0 fixed inset-0 z-50 bg-black/50 cursor-pointer",
         className
       )}
       {...props}

src/components/ui/sidebar.tsx

@@ -187,7 +187,7 @@ function Sidebar({
 
   if (isMobile) {
     return (
-      <Sheet open={openMobile} onOpenChange={setOpenMobile} {...props}>
+      <Sheet open={openMobile} onOpenChange={setOpenMobile} modal={false} {...props}>
         <SheetContent
           data-sidebar="sidebar"
           data-slot="sidebar"