Fix JavaScript string literal syntax error in array join

- Change '\\n' to '\n' in allTexts.join() call
- This was causing 'missing ) after argument list' error in page.evaluate
- JavaScript string literals need single backslash, not double backslash
- Resolves the remaining JavaScript syntax error in JSON response detection

olproxy.py

@@ -605,7 +605,7 @@ async def detect_json_response_with_id(page, container_selector, request_id, pro
                         // Try different text combinations
                         const combinations = [
                             allTexts.join(' '),
-                            allTexts.join('\\n'),
+                            allTexts.join('\n'),
                             allTexts.join(''),
                             ...allTexts  // Individual texts
                         ];