fix: instant backdrop render prevents chart flash through glass modal

components/settings/unified/UnifiedSettingsModal.tsx

@@ -376,12 +376,8 @@ export default function UnifiedSettingsModal() {
     <AnimatePresence>
       {isOpen && (
         <>
-          {/* Backdrop */}
+          {/* Backdrop — no opacity animation to prevent chart flash through glass */}
-          <motion.div
+          <div
-            initial={{ opacity: 0 }}
-            animate={{ opacity: 1 }}
-            exit={{ opacity: 0 }}
-            transition={{ duration: 0.2 }}
             className="fixed inset-0 z-[60] bg-black/60 backdrop-blur-sm"
             onClick={handleBackdropClick}
           />