fix: script save issue

notebook_lm_kokoro.py

@@ -222,7 +222,10 @@ def generate_podcast_script(
     Set provider="openrouter" to use OpenRouter, otherwise uses OpenAI.
     """
     pdf_basename = os.path.splitext(os.path.basename(pdf_path))[0]
-    folder = os.path.join(os.getcwd(), pdf_basename)
+    
+    # Use /tmp if writable, else fallback to current working directory
+    base_dir = "/tmp" if os.access("/tmp", os.W_OK) else os.getcwd()
+    folder = os.path.join(base_dir, pdf_basename)
     os.makedirs(folder, exist_ok=True)
 
     destination_pdf = os.path.join(folder, os.path.basename(pdf_path))