Fixes EPUB output fix

app.py

@@ -34,8 +34,9 @@ def process_pdf_to_epub(pdf_file, title, author):
         text = page.get("decoded", {}).get("natural_text", "")
         if not text.strip():
             continue
+        safe_text = text.replace("\n", "<br/>")
         chapter = epub.EpubHtml(title=f"Page {i+1}", file_name=f"page_{i+1}.xhtml", lang="en")
-        chapter.content = f"<h1>Page {i+1}</h1><p>{text.replace('\n', '<br/>')}</p>"
+        chapter.content = f"<h1>Page {i+1}</h1><p>{safe_text}</p>"
         book.add_item(chapter)
         chapters.append(chapter)