Refactor CreateProductDialog and CreateStoreDialog components for improved form handling

- Remove unnecessary destructuring of form values in CreateProductDialog to simplify code.
- Enhance conditional rendering in CreateStoreDialog to ensure proper checks for selected countries.
- Update API request handling in CreateStoreDialog to enforce non-null assertions for required fields.
- Adjust MerchantStore component to use underscore-prefixed parameters in event handlers for clarity.

These changes streamline the form handling process and improve code readability across the components.

src/modules/market/components/MerchantStore.vue

@@ -331,7 +331,6 @@ import {
   AlertCircle,
   User
 } from 'lucide-vue-next'
-import type { OrderStatus } from '@/modules/market/stores/market'
 import type { NostrmarketAPI, Merchant, Stall, Product } from '../services/nostrmarketAPI'
 import { auth } from '@/composables/useAuthService'
 import { useToast } from '@/core/composables/useToast'
@@ -542,12 +541,12 @@ const checkMerchantProfile = async () => {
 }
 
 // Event handlers
-const onStoreCreated = async (stall: Stall) => {
+const onStoreCreated = async (_stall: Stall) => {
   await loadStallsList()
   toast.success('Store created successfully!')
 }
 
-const onProductCreated = async (product: Product) => {
+const onProductCreated = async (_product: Product) => {
   await loadStallProducts()
   toast.success('Product created successfully!')
 }