Apply zh-cn to zh-tw conversion on generated titles

- Add s2tw_converter.convert() call to title generation
- Ensures titles are converted from Simplified to Traditional Chinese
- Maintains consistency with summary text conversion

src/summarization.py

@@ -253,6 +253,8 @@ def generate_title(transcript: str, selected_gguf_model: str) -> str:
         title = response['choices'][0]['message']['content'].strip()
         # Clean up the title (remove quotes, extra whitespace)
         title = title.strip('"\'').strip()
+        # Apply zh-cn to zh-tw conversion
+        title = s2tw_converter.convert(title)
         return title if title else "Untitled Document"
 
     except Exception as e: