feat(notifications): refresh on mount and resume with debounce

Trigger refreshNotifications on composable mount and document resume, using a
debounced/in-flight guarded wrapper to avoid rapid duplicate refresh calls.
Expose the debounced refresh function from useNotifications.

src/composables/useNotifications.ts

@@ -1,7 +1,8 @@
 /* eslint-disable @typescript-eslint/no-unused-vars */
-import { inject } from "vue";
+import { inject, onBeforeUnmount, onMounted } from "vue";
 import { NotificationIface } from "../constants/app";
 import { registerToken } from "@/services/notifications/NotificationService";
+import { refreshNotifications } from "@/services/notifications/NativeNotificationService";
 
 /**
  * Vue 3 composable for notifications
@@ -30,6 +31,38 @@ export function useNotifications() {
     );
   }
 
+  let refreshTimer: number | undefined = undefined;
+  let refreshInFlight: Promise<void> | null = null;
+
+  async function refreshNotificationsDebounced(): Promise<void> {
+    if (refreshTimer != null) {
+      window.clearTimeout(refreshTimer);
+    }
+    refreshTimer = window.setTimeout(() => {
+      if (!refreshInFlight) {
+        refreshInFlight = refreshNotifications().finally(() => {
+          refreshInFlight = null;
+        });
+      }
+    }, 300);
+  }
+
+  const onResume = () => {
+    void refreshNotificationsDebounced();
+  };
+
+  onMounted(() => {
+    void refreshNotificationsDebounced();
+    document.addEventListener("resume", onResume);
+  });
+
+  onBeforeUnmount(() => {
+    document.removeEventListener("resume", onResume);
+    if (refreshTimer != null) {
+      window.clearTimeout(refreshTimer);
+    }
+  });
+
   // eslint-disable-next-line @typescript-eslint/no-unused-vars
   function success(_notification: NotificationIface, _timeout?: number) {}
   // eslint-disable-next-line @typescript-eslint/no-unused-vars
@@ -96,5 +129,6 @@ export function useNotifications() {
     downloadStarted,
     /** POST FCM token to `/notifications/register` (same as startup native hook). */
     registerFcmToken: registerToken,
+    refreshNotifications: refreshNotificationsDebounced,
   };
 }