fix(notifications): send deviceId on refresh to match backend contract

The /notifications/refresh endpoint now requires deviceId or fcmToken.
Reuse the stable device ID from registration so refresh no longer returns 400.

src/services/notifications/NativeNotificationService.ts

@@ -14,6 +14,7 @@
 import { Capacitor } from "@capacitor/core";
 import type { PushNotificationSchema } from "@capacitor/push-notifications";
 import { DailyNotification } from "@/plugins/DailyNotificationPlugin";
+import { getOrCreateDeviceId } from "./deviceId";
 import { REMINDER_ID_DAILY_REMINDER } from "./reminderIds";
 import { configureNativeFetcherIfReady } from "./nativeFetcherConfig";
 import {
@@ -601,11 +602,22 @@ export async function refreshNotificationsWithDiagnostics(options?: {
       };
     }
 
+    let deviceId: string | undefined;
+    try {
+      deviceId = await getOrCreateDeviceId();
+    } catch (err) {
+      logger.warn(
+        "[NativeNotificationService] Could not obtain deviceId; refresh proceeding without deviceId",
+        err,
+      );
+    }
+
     const baseUrl = getNotificationApiBaseUrl();
     const res = await fetch(`${baseUrl}/notifications/refresh`, {
       method: "POST",
       headers: auth.headers,
       body: JSON.stringify({
+        deviceId,
         platform: Capacitor.getPlatform(),
         testMode: getTestMode(),
       }),