fix: cleanup

frontend/src/api/loadEbookWithProgress.ts

@@ -0,0 +1,14 @@
+import { booksApi } from "@/api/books";
+import { getReadingProgress } from "@/api/reader";
+import type { ReadingProgress } from "@/types/reader";
+
+export async function loadEbookWithProgress(bookId: number): Promise<{
+  progressData: ReadingProgress | null;
+  blob: Blob;
+}> {
+  const [progressData, blob] = await Promise.all([
+    getReadingProgress(bookId).catch(() => null),
+    booksApi.getEbookFile(bookId),
+  ]);
+  return { progressData, blob };
+}