improvments are done

src/app/services/cart.service.ts

@@ -1,13 +1,14 @@
 import { Injectable, signal, computed, effect } from '@angular/core';
 import { ApiService } from './api.service';
 import { Item, CartItem } from '../models';
+import { environment } from '../../environments/environment';
 import type { } from '../types/telegram.types';
 
 @Injectable({
   providedIn: 'root'
 })
 export class CartService {
-  private readonly STORAGE_KEY = 'dexarmarket_cart';
+  private readonly STORAGE_KEY = `${environment.brandName.toLowerCase().replace(/\s+/g, '_')}_cart`;
   private cartItems = signal<CartItem[]>([]);
   private isTelegram = typeof window !== 'undefined' && !!window.Telegram?.WebApp;
   
@@ -60,29 +61,13 @@ export class CartService {
           console.error('Error loading from Telegram CloudStorage:', err);
           this.loadFromSessionStorage();
         } else if (value) {
-          try {
-            const items = JSON.parse(value);
-            if (Array.isArray(items)) {
-              // Migrate old items without quantity field
-              const migratedItems: CartItem[] = items.map(item => ({
-                ...item,
-                quantity: item.quantity || 1
-              }));
-              this.cartItems.set(migratedItems);
-            } else {
-              this.cartItems.set([]);
-            }
-          } catch (parseErr) {
-            console.error('Error parsing cart data:', parseErr);
-            this.loadFromSessionStorage();
-          }
+          this.parseAndSetCart(value) || this.loadFromSessionStorage();
         } else {
           // No data in CloudStorage, try sessionStorage
           this.loadFromSessionStorage();
         }
       });
     } else {
-      // Load from sessionStorage
       this.loadFromSessionStorage();
     }
   }
@@ -90,27 +75,28 @@ export class CartService {
   private loadFromSessionStorage(): void {
     const stored = sessionStorage.getItem(this.STORAGE_KEY);
     if (stored) {
-      try {
-        const items = JSON.parse(stored);
-        if (Array.isArray(items)) {
-          // Migrate old items without quantity field
-          const migratedItems: CartItem[] = items.map(item => ({
-            ...item,
-            quantity: item.quantity || 1
-          }));
-          this.cartItems.set(migratedItems);
-        } else {
-          this.cartItems.set([]);
-        }
-      } catch (err) {
-        console.error('Error parsing cart from sessionStorage:', err);
-        this.cartItems.set([]);
-      }
-    } else {
-      this.cartItems.set([]);
+      this.parseAndSetCart(stored);
     }
   }
 
+  /** Parse JSON cart data, migrate legacy items, and set the signal. Returns true on success. */
+  private parseAndSetCart(json: string): boolean {
+    try {
+      const items = JSON.parse(json);
+      if (Array.isArray(items)) {
+        this.cartItems.set(items.map(item => ({
+          ...item,
+          quantity: item.quantity || 1
+        })));
+        return true;
+      }
+    } catch (err) {
+      console.error('Error parsing cart data:', err);
+    }
+    this.cartItems.set([]);
+    return false;
+  }
+
   addItem(itemID: number, quantity: number = 1): void {
     const currentItems = this.cartItems();
     const existingItem = currentItems.find(i => i.itemID === itemID);