[web] Add the Back to School group sale banner to the plans page (#36956)

* [web] Add the Back to School group sale banner to the plans page

Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>
GitOrigin-RevId: 596b23006fce7504fcdfd6341cf93429c08acc8b

services/web/app/views/_mixins/notification.pug

@@ -12,7 +12,7 @@ mixin notificationIcon(type)
 		+material-symbol('warning')
 
 mixin notification(options)
-	- var {ariaLive, id, type, title, content, disclaimer, className, dismissId, dismissCookiePaths} = options ?? {}
+	- var {ariaLive, id, type, title, content, action, disclaimer, className, dismissId, dismissCookiePaths, isActionBelowContent} = options ?? {}
 	- var classNames = `notification notification-type-${type} ${className ? className : ''} ${isActionBelowContent ? 'notification-cta-below-content' : ''}`
 
 	if dismissId && dismissedNotifications.includes(dismissId)
@@ -35,9 +35,8 @@ mixin notification(options)
 							b #{title}
 					| !{content}
 					block
-				//- TODO: handle action
-				//- if action
-				//- 	.notification-cta
+				if action
+					.notification-cta !{action}
 				if disclaimer
 					.notification-disclaimer #{disclaimer}
 			if dismissId

services/web/locales/en.json

@@ -272,6 +272,7 @@
   "back_to_log_in": "Back to log in",
   "back_to_my_projects": "Back to my projects",
   "back_to_pdf": "Back to PDF",
+  "back_to_school_group_sale_plans_page_banner": "<0>Back to School sale:</0> Groups at degree-granting institutions can save an additional 20% on new Standard and Pro subscriptions of 20+ users. Get in touch with our sales team by <1>October 15</1>.",
   "back_to_subscription": "Back to subscription",
   "back_to_your_projects": "Back to your projects",
   "basic": "Basic",