fix: cleanup

frontend/src/hooks/usePdfReader.ts

@@ -3,8 +3,8 @@
  */
 
 import { useCallback, useEffect, useRef, useState } from "react";
-import { booksApi } from "../api/books";
-import { getReadingProgress, updateReadingProgress } from "../api/reader";
+import { loadEbookWithProgress } from "../api/loadEbookWithProgress";
+import { updateReadingProgress } from "../api/reader";
 import type { ReadingProgress } from "../types/reader";
 import { parsePdfAnchor } from "../utils/pdfAnchor";
 import { pdfjs, type PdfDocumentProxy } from "../utils/pdfjsSetup";
@@ -175,10 +175,7 @@ export function usePdfReader(
       setIsLoading(true);
       setError(null);
       try {
-        const [progressData, blob] = await Promise.all([
-          getReadingProgress(bookId).catch(() => null),
-          booksApi.getEbookFile(bookId),
-        ]);
+        const { progressData, blob } = await loadEbookWithProgress(bookId);
         if (cancelled) return;
 
         const loadingTask = pdfjs.getDocument({ data: await blob.arrayBuffer() });