style: backdrop-blur on edit modal overlay

frontend/src/app/places/my/page.tsx

@@ -25,7 +25,7 @@ function EditModal({ placeId, onClose, onSaved }: { placeId: string; onClose: ()
   }, [placeId, onClose])
 
   return (
-    <div className="fixed inset-0 z-50 flex items-start justify-center overflow-y-auto bg-black/60 pt-10 pb-10" onClick={onClose}>
+    <div className="fixed inset-0 z-50 flex items-start justify-center overflow-y-auto bg-black/60 pt-10 pb-10 backdrop-blur-sm" onClick={onClose}>
       <div className="w-full max-w-2xl rounded-xl bg-[#1e293b] shadow-xl" onClick={(e) => e.stopPropagation()}>
         {loading ? (
           <div className="flex items-center justify-center p-8">