completed admin panel

src/components/ConfigCountriesSelect.vue

@@ -16,6 +16,7 @@
             :key="code?.id"
         >
           {{ code?.title }}
+          <template v-if="code?.country_code">({{ code?.country_code }})</template>
         </option>
       </select>
       <small id="country-code-help" class="form-text text-muted">