web: add firebase push token registration and sync

web/src/api/notifications.ts

@@ -12,3 +12,18 @@ export async function getNotifications(limit = 30): Promise<NotificationItem[]>
   const { data } = await http.get<NotificationItem[]>("/notifications", { params: { limit } });
   return data;
 }
+
+interface PushTokenPayload {
+  platform: "android" | "web" | "ios";
+  token: string;
+  device_id?: string;
+  app_version?: string;
+}
+
+export async function upsertPushToken(payload: PushTokenPayload): Promise<void> {
+  await http.post("/notifications/push-token", payload);
+}
+
+export async function deletePushToken(payload: Pick<PushTokenPayload, "platform" | "token">): Promise<void> {
+  await http.delete("/notifications/push-token", { data: payload });
+}