Refine player layout and station data

src/radio/loadManagedStations.ts

@@ -0,0 +1,10 @@
+export async function loadManagedStations(): Promise<unknown[]> {
+  const response = await fetch('/stations.json');
+
+  if (!response.ok) {
+    throw new Error(`Failed to load managed stations: ${response.status}`);
+  }
+
+  const stations = await response.json();
+  return Array.isArray(stations) ? stations : [];
+}