feat(throttling): add global rate limit lockout flow

src/context/NotificationsContext.tsx

@@ -23,6 +23,7 @@ import {
 } from "../api/notifications"
 import { useTranslation } from "../hooks/useTranslation"
 import { presentNotification } from "../lib/notificationPresenter"
+import { isRateLimitActive } from "../lib/rateLimit"
 import {
   getAccessToken,
   SESSION_CHANGED_EVENT,
@@ -171,7 +172,7 @@ export function NotificationsProvider({ children }: { children: ReactNode }) {
   )
 
   const refreshNotifications = useCallback(async () => {
-    if (!getAccessToken()) {
+    if (!getAccessToken() || isRateLimitActive()) {
       setNotifications([])
       setUnreadCount(0)
       setTotalCount(0)
@@ -279,7 +280,7 @@ export function NotificationsProvider({ children }: { children: ReactNode }) {
   }, [markAsSeen, openNotificationTarget, t.notifications])
 
   const connectToStream = useCallback(async () => {
-    if (!getAccessToken()) {
+    if (!getAccessToken() || isRateLimitActive()) {
       closeEventSource()
       setConnectionStatus("idle")
       return
@@ -413,7 +414,7 @@ export function NotificationsProvider({ children }: { children: ReactNode }) {
 
   useEffect(() => {
     const startNotifications = async () => {
-      if (!getAccessToken()) {
+      if (!getAccessToken() || isRateLimitActive()) {
         closeEventSource()
         setNotifications([])
         setUnreadCount(0)