feat: introduce loading context management across services

- Refactor AuthService, CartService, CatalogService, CheckoutService, TenantService, and TicketService to extend BaseApiService for consistent loading context handling.
- Implement loading modes ('global', 'custom', 'none') using HttpContext for API requests.
- Update existing service methods to accept loading mode parameters and propagate them to HTTP requests.
- Enhance global loading interceptor to respect loading modes and prevent global loading for specific requests.
- Add unit tests to verify loading mode propagation in services and interceptors.
- Update component interactions to utilize the new loading mode functionality.

src/app/features/store/pages/purchase-status-page/purchase-status-page.component.spec.ts

@@ -66,6 +66,9 @@ describe('PurchaseStatusPageComponent', () => {
   async function render(hasGeneratedTickets: boolean) {
     const checkoutService = {
       getPurchase: vi.fn().mockResolvedValue(purchase(hasGeneratedTickets)),
+      withCustomLoading() {
+        return this;
+      },
     };
     const router = {
       navigate: vi.fn().mockResolvedValue(true),

src/app/features/store/pages/purchase-status-page/purchase-status-page.component.ts

@@ -63,7 +63,9 @@ export class PurchaseStatusPageComponent implements OnInit {
     }
 
     try {
-      const purchase = await this.checkoutService.getPurchase(this.tenantCode, this.purchaseId);
+      const purchase = await this.checkoutService
+        .withCustomLoading()
+        .getPurchase(this.tenantCode, this.purchaseId);
       this.status.set(this.resolveStatus(purchase));
       this.hasGeneratedTickets.set(purchase.has_generated_tickets === true);
     } catch (error) {