feat: persist station sync catalogs and status

src/radio/loadManagedStations.ts

@@ -1,6 +1,11 @@
 const MANAGED_CATALOG_CACHE_PREFIX = 'radioplayer-managed-catalog-';
 const MANAGED_CATALOG_SOURCE_HEADER = 'x-radioplayer-managed-source';
 
+import {
+  loadPersistedManagedStationCatalog,
+  persistManagedStationCatalog,
+} from '../storage/stationCatalogPersistence.js';
+
 export type ManagedCatalogSource = 'remote' | 'cached-remote' | 'bundled' | 'unknown';
 
 let lastManagedCatalogSource: ManagedCatalogSource = 'unknown';
@@ -44,10 +49,26 @@ function setLastManagedCatalogSource(source: ManagedCatalogSource) {
   lastManagedCatalogSource = source;
 }
 
+function normalizeManagedCatalogSource(source: unknown): ManagedCatalogSource {
+  return source === 'remote' || source === 'cached-remote' || source === 'bundled'
+    ? source
+    : 'unknown';
+}
+
 export function getLastManagedCatalogSource(): ManagedCatalogSource {
   return lastManagedCatalogSource;
 }
 
+export async function loadPersistedManagedStations(): Promise<unknown[] | null> {
+  const persisted = await loadPersistedManagedStationCatalog();
+  if (!persisted) {
+    return null;
+  }
+
+  setLastManagedCatalogSource(normalizeManagedCatalogSource(persisted.source));
+  return normalizeManagedStationsPayload(persisted.stations);
+}
+
 export async function loadManagedStations(): Promise<unknown[]> {
   const remoteCatalogUrl = `${import.meta.env.BASE_URL}api/managed-stations.json`;
   const bundledCatalogUrl = `${import.meta.env.BASE_URL}stations.json`;
@@ -92,6 +113,7 @@ export async function loadManagedStations(): Promise<unknown[]> {
     throw new Error(`Failed to load managed stations: ${response.status}`);
   }
 
-  const stations = await response.json();
-  return normalizeManagedStationsPayload(stations);
+  const stations = normalizeManagedStationsPayload(await response.json());
+  await persistManagedStationCatalog(stations, getLastManagedCatalogSource());
+  return stations;
 }