settings: Fix email notification permission.

Added `message_content_in_email_notifications` to the
`disabled_notification_settings` object to keep track of the setting.
Also added a tooltip message to display when the checkbox is disabled,
indicating that the setting is controlled by the organization.

Fixes: #27262.

web/src/settings_config.ts

@@ -862,6 +862,7 @@ export type AllNotifications = {
     disabled_notification_settings: {
         push_notifications: boolean;
         enable_online_push_notifications: boolean;
+        message_content_in_email_notifications: boolean;
     };
 };
 
@@ -898,6 +899,8 @@ export const all_notifications = (settings_object: Settings): AllNotifications =
     disabled_notification_settings: {
         push_notifications: !realm.realm_push_notifications_enabled,
         enable_online_push_notifications: !realm.realm_push_notifications_enabled,
+        message_content_in_email_notifications:
+            !realm.realm_message_content_allowed_in_email_notifications,
     },
 });
 

web/src/tippyjs.ts

@@ -531,6 +531,24 @@ export function initialize(): void {
         },
     });
 
+    tippy.delegate("body", {
+        target: "#user_message_content_in_email_notifications_label",
+        onShow(instance) {
+            if ($("#user_message_content_in_email_notifications").prop("disabled")) {
+                instance.setContent(
+                    $t({
+                        defaultMessage:
+                            "Including message content in message notification emails is not allowed in this organization.",
+                    }),
+                );
+                return undefined;
+            }
+            instance.destroy();
+            return false;
+        },
+        appendTo: () => document.body,
+    });
+
     tippy.delegate("body", {
         target: ".views-tooltip-target",
         onShow(instance) {

web/templates/settings/notification_settings.hbs

@@ -212,6 +212,7 @@
               setting_name=this
               is_checked=(lookup ../settings_object this)
               label=(lookup ../settings_label this)
+              is_disabled=(lookup ../disabled_notification_settings this)
               prefix=../prefix}}
         {{/each}}
     </div>