Fix cart rendering crash from nested ref access

app/pages/cart.vue

@@ -6,13 +6,22 @@ import { useCounterpartyProfile } from '~/composables/useCounterpartyProfile';
 
 const { isComplete: isCounterpartyComplete, loading: counterpartyLoading } = useCounterpartyProfile();
 const submitMutation = useMutation(SubmitCalculationOrderDocument, { throws: 'never' });
-const cart = useClientCart();
+const {
+  items: cartItems,
+  totalPositions,
+  totalItems,
+  totalVolume,
+  incrementQuantity,
+  decrementQuantity,
+  removeProduct,
+  clearCart,
+} = useClientCart();
 const sending = ref(false);
 const success = ref('');
 const errorMessage = ref('');
 
 function lineVolume(productId: string) {
-  const item = cart.items.value.find((entry) => entry.productId === productId);
+  const item = cartItems.value.find((entry) => entry.productId === productId);
   if (!item) {
     return 0;
   }
@@ -23,19 +32,19 @@ function lineVolume(productId: string) {
 function increment(productId: string) {
   success.value = '';
   errorMessage.value = '';
-  cart.incrementQuantity(productId);
+  incrementQuantity(productId);
 }
 
 function decrement(productId: string) {
   success.value = '';
   errorMessage.value = '';
-  cart.decrementQuantity(productId);
+  decrementQuantity(productId);
 }
 
 function removeFromCart(productId: string) {
   success.value = '';
   errorMessage.value = '';
-  cart.removeProduct(productId);
+  removeProduct(productId);
 }
 
 async function submitCart() {
@@ -47,7 +56,7 @@ async function submitCart() {
     return;
   }
 
-  if (cart.items.value.length < 1) {
+  if (cartItems.value.length < 1) {
     errorMessage.value = 'Добавьте хотя бы одну позицию в корзину.';
     return;
   }
@@ -55,7 +64,7 @@ async function submitCart() {
   sending.value = true;
   const createdCodes: string[] = [];
 
-  for (const item of cart.items.value) {
+  for (const item of cartItems.value) {
     const result = await submitMutation.mutate({
       input: {
         productName: item.productName,
@@ -79,7 +88,7 @@ async function submitCart() {
   }
 
   sending.value = false;
-  cart.clearCart();
+  clearCart();
   success.value = `Отправлено заявок: ${createdCodes.length}. Статус: уточнение цены.`;
 }
 </script>
@@ -100,13 +109,13 @@ async function submitCart() {
       <div class="rounded-2xl border border-base-300 bg-base-100 p-4">
         <h2 class="text-lg font-bold text-[#123824]">Список позиций</h2>
 
-        <div v-if="cart.items.length === 0" class="alert mt-3">
+        <div v-if="cartItems.length === 0" class="alert mt-3">
           Корзина пока пустая. Добавьте товар из каталога.
         </div>
 
         <ul v-else class="mt-3 space-y-2">
           <li
-            v-for="item in cart.items"
+            v-for="item in cartItems"
             :key="item.productId"
             class="flex flex-col gap-3 rounded-xl border border-[#d6ebde] bg-white/75 px-3 py-3 md:flex-row md:items-center md:justify-between"
           >
@@ -135,22 +144,22 @@ async function submitCart() {
         <ul class="mt-3 space-y-2 text-sm text-[#214735]">
           <li class="flex items-center justify-between">
             <span>Позиций</span>
-            <span class="font-semibold">{{ cart.totalPositions }}</span>
+            <span class="font-semibold">{{ totalPositions }}</span>
           </li>
           <li class="flex items-center justify-between">
             <span>Количество, шт.</span>
-            <span class="font-semibold">{{ cart.totalItems }}</span>
+            <span class="font-semibold">{{ totalItems }}</span>
           </li>
           <li class="flex items-center justify-between">
             <span>Суммарный объем</span>
-            <span class="font-semibold">{{ cart.totalVolume }}</span>
+            <span class="font-semibold">{{ totalVolume }}</span>
           </li>
         </ul>
       </div>
 
       <button
         class="btn w-full border-0 bg-[#139957] text-white hover:bg-[#0d854a]"
-        :disabled="sending || counterpartyLoading.value || !isCounterpartyComplete || cart.items.length === 0"
+        :disabled="sending || counterpartyLoading.value || !isCounterpartyComplete || cartItems.length === 0"
         @click="submitCart"
       >
         {{ sending ? 'Отправляем…' : 'Оформить заявку' }}