wip: shopping cart, product options

spa/src/App.vue

@@ -2,6 +2,7 @@
   <div class="app-container">
     <FullscreenViewport v-if="platform === 'ios' || platform === 'android'"/>
     <router-view/>
+    <CartButton/>
   </div>
 </template>
 
@@ -10,6 +11,7 @@ import {onMounted, ref, watch} from "vue";
 import {useWebAppViewport, useBackButton} from 'vue-tg';
 import {useMiniApp, FullscreenViewport} from 'vue-tg';
 import {useRoute, useRouter} from "vue-router";
+import CartButton from "@/components/CartButton.vue";
 
 const tg = useMiniApp();
 const platform = ref();