add notification immediately after setting up subscription, and tweak messaging

src/App.vue

@@ -291,6 +291,7 @@ interface VapidResponse {
 import { DEFAULT_PUSH_SERVER } from "@/constants/app";
 import { db } from "@/db/index";
 import { MASTER_SETTINGS_KEY } from "@/db/tables/settings";
+import { sendTestThroughPushServer } from "@/libs/util";
 
 interface Notification {
   group: string;
@@ -447,23 +448,34 @@ export default class App extends Vue {
           .then((registration) => {
             return registration.pushManager.getSubscription();
           })
-          .then((subscription) => {
+          .then(async (subscription) => {
             if (subscription) {
-              return this.sendSubscriptionToServer(subscription);
+              await this.$notify(
+                {
+                  group: "alert",
+                  type: "info",
+                  title: "Notification Setup Underway",
+                  text: "Setting up notifications for interesting activity, which takes about 10 seconds. If you don't see a final confirmation, check the 'Troubleshoot' page.",
+                },
+                -1,
+              );
+              this.sendSubscriptionToServer(subscription);
+              return subscription;
             } else {
               throw new Error("Subscription object is not available.");
             }
           })
-          .then(() => {
+          .then(async (subscription) => {
             console.log(
               "Subscription data sent to server and all finished successfully.",
             );
+            await sendTestThroughPushServer(subscription, true);
             this.$notify(
               {
                 group: "alert",
                 type: "success",
                 title: "Notifications Turned On",
-                text: "Notifications are on. You should see one on your device; if not, see the 'Troubleshoot' page.",
+                text: "Notifications are on. You should see at least one on your device; if not, check the 'Troubleshoot' page.",
               },
               -1,
             );