fixes

- apply fixed height for footer buttons over app
- add floating cart button in cart page in desktop size

src/pages/menu/components/MenuList/MenuList.tsx

@@ -157,7 +157,7 @@ export function MenuList({ data, categoryRefs }: MenuListProps) {
                             style={{
                               margin: 0,
                               display: "inline-block",
-                              fontSize: xs ? "1rem" : 18,
+                              fontSize: "1rem" ,
                               fontWeight: 600,
                               letterSpacing: "-0.01em",
                               lineHeight: 1.2,
@@ -194,7 +194,7 @@ export function MenuList({ data, categoryRefs }: MenuListProps) {
                                 price={item.original_price}
                                 strong
                                 style={{
-                                  fontSize: xs ? "1rem" : 22,
+                                  fontSize: "1rem",
                                   fontWeight: 700,
                                   color: colors.primary,
                                   textDecoration: "line-through",
@@ -207,7 +207,7 @@ export function MenuList({ data, categoryRefs }: MenuListProps) {
                               price={item.price}
                               strong
                               style={{
-                                fontSize: xs ? "1rem" : 22,
+                                fontSize: "1rem",
                                 fontWeight: 700,
                                 color: colors.primary,
                               }}