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/CreateStoreDialog.vue

@@ -155,10 +155,10 @@
                     </SelectContent>
                   </Select>
                 </FormControl>
-                <div v-if="values.newZone?.selectedCountries?.length > 0" class="mt-2">
+                <div v-if="values.newZone?.selectedCountries && values.newZone.selectedCountries.length > 0" class="mt-2">
                   <div class="flex flex-wrap gap-1">
                     <Badge 
-                      v-for="country in values.newZone.selectedCountries" 
+                      v-for="country in (values.newZone?.selectedCountries || [])" 
                       :key="country"
                       variant="secondary"
                       class="text-xs"
@@ -211,7 +211,7 @@
 </template>
 
 <script setup lang="ts">
-import { ref, computed, onMounted, watch, nextTick } from 'vue'
+import { ref, computed, watch, nextTick } from 'vue'
 import { useForm } from 'vee-validate'
 import { toTypedSchema } from '@vee-validate/zod'
 import * as z from 'zod'
@@ -353,10 +353,10 @@ const addNewZone = async () => {
     const createdZone = await nostrmarketAPI.createZone(
       currentUser.wallets[0].adminkey,
       {
-        name: newZone.name,
-        currency: values.currency,
-        cost: newZone.cost,
-        countries: newZone.selectedCountries
+        name: newZone.name!,
+        currency: values.currency!,
+        cost: newZone.cost!,
+        countries: newZone.selectedCountries!
       }
     )