fixes

- clean coupon on success order
- in menu on clicking on the sticky categories make scroll jump to the category title postion exactly

src/contexts/ScrollHandlerContext.tsx

@@ -42,12 +42,22 @@ export function ScrollHandlerProvider({ children }: { children: ReactNode }) {
   const scrollToCategory = useCallback((categoryId: number) => {
     const categoryRef = categoryRefs.current?.[categoryId];
     if (categoryRef) {
-      categoryRef.scrollIntoView({
+      // Get the sticky header height (70px when sticky, 0 when not)
+      const stickyHeaderHeight = isCategoriesSticky && categoriesContainerRef.current
+        ? categoriesContainerRef.current.offsetHeight
+        : 0;
+      
+      // Calculate the position of the category element
+      const elementPosition = categoryRef.getBoundingClientRect().top;
+      const offsetPosition = elementPosition + window.pageYOffset - stickyHeaderHeight;
+      
+      // Scroll to the exact position, accounting for sticky header
+      window.scrollTo({
+        top: offsetPosition,
         behavior: "smooth",
-        block: "start",
       });
     }
-  }, []);
+  }, [isCategoriesSticky, categoriesContainerRef]);
 
   return (
     <ScrollHandlerContext.Provider