add registration inside contact import, with flag to hide it

src/App.vue

@@ -146,13 +146,19 @@
         move="transition duration-500"
         move-delay="delay-300"
       >
+        <!-- see NotificationIface in constants/app.ts -->
         <div
           v-for="notification in notifications"
           :key="notification.id"
           class="w-full"
           role="alert"
         >
-          <!-- type "confirm" will post a message and, with onYes function, show a "Yes" button to call that function -->
+          <!--
+           Type of "confirm" will post a message.
+           With onYes function, show a "Yes" button to call that function.
+           With onNo function, show a "No" button to call that function,
+             and pass it state of "askAgain" field shown if you set promptToStopAsking.
+          -->
           <div
             v-if="notification.type === 'confirm'"
             class="absolute inset-0 h-screen flex flex-col items-center justify-center bg-slate-900/50"
@@ -180,16 +186,49 @@
                 <button
                   v-if="notification.onNo"
                   @click="
-                    notification.onNo();
+                    notification.onNo(stopAsking);
                     close(notification.id);
+                    stopAsking = false; // reset value
                   "
                   class="block w-full text-center text-md font-bold uppercase bg-yellow-600 text-white px-2 py-2 rounded-md mb-2"
                 >
                   No
                 </button>
 
+                <label
+                  v-if="notification.promptToStopAsking && notification.onNo"
+                  for="toggleStopAsking"
+                  class="flex items-center justify-between cursor-pointer my-4"
+                  @click="stopAsking = !stopAsking"
+                >
+                  <!-- label -->
+                  <span class="ml-2">... and do not ask again.</span>
+                  <!-- toggle -->
+                  <div class="relative ml-2">
+                    <!-- input -->
+                    <input
+                      type="checkbox"
+                      v-model="stopAsking"
+                      name="stopAsking"
+                      class="sr-only"
+                    />
+                    <!-- line -->
+                    <div class="block bg-slate-500 w-14 h-8 rounded-full"></div>
+                    <!-- dot -->
+                    <div
+                      class="dot absolute left-1 top-1 bg-slate-400 w-6 h-6 rounded-full transition"
+                    ></div>
+                  </div>
+                </label>
+
                 <button
-                  @click="close(notification.id)"
+                  @click="
+                    notification.onCancel
+                      ? notification.onCancel(stopAsking)
+                      : null;
+                    close(notification.id);
+                    stopAsking = false; // reset value
+                  "
                   class="block w-full text-center text-md font-bold uppercase bg-slate-600 text-white px-2 py-2 rounded-md"
                 >
                   {{ notification.onYes ? "Cancel" : "Close" }}
@@ -373,6 +412,7 @@ import { sendTestThroughPushServer } from "@/libs/util";
 export default class App extends Vue {
   $notify!: (notification: NotificationIface, timeout?: number) => void;
 
+  stopAsking = false;
   b64 = "";
   hourAm = true;
   hourInput = "8";