Add PDF upload with text extraction

src/App.tsx

@@ -13,6 +13,7 @@ import { InfoModal } from "./components/modals/InfoModal";
 import { SettingsModal } from "./components/modals/SettingsModal";
 import { ShortcutsModal } from "./components/modals/ShortcutsModal";
 import { parseEpub, fetchMetadataFromOpenLibrary } from "./lib/epub";
+import { parsePdf } from "./lib/pdf";
 import { formatReadingTime, getORPIndex, getWordDelay } from "./lib/reading";
 import {
   IOS_BANNER_DISMISSED_KEY,
@@ -148,12 +149,16 @@ export default function App() {
             }
           }
           setBookMetadata(metadata);
+        } else if (file.name.endsWith(".pdf")) {
+          const extractedText = await parsePdf(file);
+          setText(extractedText);
+          setBookMetadata({ title: file.name, author: null, cover: null });
         } else if (file.name.endsWith(".txt")) {
           const textContent = await file.text();
           setText(textContent);
           setBookMetadata(null);
         } else {
-          alert("Please upload an EPUB or TXT file");
+          alert("Please upload an EPUB, PDF, or TXT file");
         }
       } catch (err) {
         console.error("Error loading file:", err);
@@ -387,7 +392,7 @@ export default function App() {
         onToggleTextInput={() => setShowTextInput((prev) => !prev)}
         fileInputRef={fileInputRef}
         onFileUpload={handleFileUpload}
-        fileAccept=".epub,.txt"
+        fileAccept=".epub,.pdf,.txt"
         isLoadingFile={isLoadingFile}
         fullscreenSupported={isFullscreenSupported()}
         isFullscreen={isFullscreen}