cart checker for remove cart when slug changed

src/zustand/receiptStore.ts

@@ -10,6 +10,8 @@ type ReceiptItemMap = {
 
 type ReceiptStore = {
   items: ReceiptItemMap;
+  slug: string | null;
+  setSlug: (slug: string) => void;
   increment: (id: string | number) => void;
   decrement: (id: string | number) => void;
   clear: () => void;
@@ -19,7 +21,9 @@ export const useReceiptStore = create<ReceiptStore>()(
   persist(
     (set) => ({
       items: {},
-      clear: () => set({ items: {} }),
+      slug: null,
+      setSlug: (slug) => set({ slug }),
+      clear: () => set({ items: {}, slug: null }),
       increment: (id) =>
         set((state) => {
           const current = state.items[id]?.quantity || 0;