remove \n and replace them by one space in web extraction

app.py

@@ -182,7 +182,7 @@ def analyze_pdf_novelty(patent_background, pdf_url):
                 return {"error": "PDF has no pages"}
                 
             first_page = pdf_document.load_page(0)
-            text = first_page.get_text()
+            text = re.sub(r'\n+', ' ', first_page.get_text())
             
             # Return the extracted text for frontend analysis with OpenAI
             # We're not doing the analysis here as it will be done in the frontend