Bug 1926708 - Show success notifications at each step in account hub. r=vineet

Differential Revision: https://phabricator.services.mozilla.com/D227203

Depends on D228112

--HG--
extra : rebase_source : 6e0de5d33b8c06e2d931ccc5484544dd8933ec91
extra : amend_source : 6ed2c66dc1ec2483af480278e85010c4e20f0511

mail/components/accountcreation/views/email.mjs

@@ -444,6 +444,7 @@ class AccountHubEmail extends HTMLElement {
    * @param {Object} stateData - The current state data of the email flow.
    */
   async #handleForwardAction(currentState, stateData) {
+    const notificationBox = this.#states[currentState].subview;
     switch (currentState) {
       case "autoConfigSubview":
         try {
@@ -482,12 +483,28 @@ class AccountHubEmail extends HTMLElement {
       case "outgoingConfigSubview":
         break;
       case "emailConfigFoundSubview":
+        notificationBox.showNotification({
+          fluentTitleId: "account-hub-config-success",
+          type: "success",
+        });
         break;
       case "emailPasswordSubview":
+        notificationBox.showNotification({
+          fluentTitleId: "account-hub-password-info",
+          type: "info",
+        });
         break;
       case "emailSyncAccountsSubview":
+        notificationBox.showNotification({
+          fluentTitleId: "account-hub-sync-success",
+          type: "success",
+        });
         break;
       case "emailAddedSubview":
+        notificationBox.showNotification({
+          fluentTitleId: "account-hub-email-added-success",
+          type: "success",
+        });
         break;
       default:
         break;

mail/locales/en-US/messenger/accountcreation/accountHub.ftl

@@ -165,3 +165,11 @@ account-hub-result-ews-text = Server
 account-hub-result-recommended-label = Recommended
 
 account-hub-edit-configuration = Edit configuration
+
+account-hub-config-success = Configuration found in Mozilla ISPDB
+
+account-hub-password-info = Your credentials will only be stored locally on your computer
+
+account-hub-sync-success = Thunderbird found some connected services
+
+account-hub-email-added-success = Email account connected successfully