refactor: centralize world and imagery requests in Axios services

src/services/worldService.js

@@ -0,0 +1,26 @@
+import { apiClient } from './apiClient.js';
+
+const WORLD_FILES = { buildings: './data/buildings.bin', imagery: './imagery/index.json' };
+
+/** Loads optional world assets without preventing the OSM fallback on network failure.
+ * @param {AbortSignal} signal - Cancels startup when the game unmounts.
+ * @returns {Promise<Array>} Binary buildings and imagery index, or null fallbacks.
+ */
+export async function loadWorldFiles(signal) {
+  const requests = [
+    apiClient.get(WORLD_FILES.buildings, { responseType: 'arraybuffer', signal }),
+    apiClient.get(WORLD_FILES.imagery, { signal }),
+  ];
+  const results = await Promise.allSettled(requests);
+  return results.map((result) => (result.status === 'fulfilled' ? result.value.data : null));
+}
+
+/** Loads a tile through the common client; the caller owns the returned object URL.
+ * @param {string} path - Local imagery path.
+ * @param {AbortSignal} signal - Request cancellation.
+ * @returns {Promise<string>} Temporary URL, to revoke after image decoding.
+ */
+export async function loadTileUrl(path, signal) {
+  const response = await apiClient.get(path, { responseType: 'blob', signal });
+  return URL.createObjectURL(response.data);
+}