fix: SMTP shouldn't be configurable without IMAP enabled (#4428)

* fix: Configure SMTP only if IMAP is enabled

app/javascript/dashboard/routes/dashboard/settings/inbox/ImapSettings.vue

@@ -3,6 +3,7 @@
     <settings-section
       :title="$t('INBOX_MGMT.IMAP.TITLE')"
       :sub-title="$t('INBOX_MGMT.IMAP.SUBTITLE')"
+      :note="$t('INBOX_MGMT.IMAP.NOTE_TEXT')"
     >
       <form @submit.prevent="updateInbox">
         <label for="toggle-imap-enable">
@@ -132,7 +133,7 @@ export default {
     async updateInbox() {
       try {
         this.loading = true;
-        const payload = {
+        let payload = {
           id: this.inbox.id,
           formData: false,
           channel: {
@@ -147,6 +148,11 @@ export default {
               : undefined,
           },
         };
+
+        if (!this.isIMAPEnabled) {
+          payload.channel.smtp_enabled = false;
+        }
+
         await this.$store.dispatch('inboxes/updateInboxIMAP', payload);
         this.showAlert(this.$t('INBOX_MGMT.IMAP.EDIT.SUCCESS_MESSAGE'));
       } catch (error) {

app/javascript/dashboard/routes/dashboard/settings/inbox/Settings.vue

@@ -422,7 +422,7 @@
           </settings-section>
         </div>
         <imap-settings :inbox="inbox" />
-        <smtp-settings :inbox="inbox" />
+        <smtp-settings v-if="inbox.imap_enabled" :inbox="inbox" />
       </div>
     </div>
     <div v-if="selectedTabKey === 'preChatForm'">