🔧 Refactor authentication to use global variables for Drive service and folders

🔧 Update authentication flow to enforce manual redirect URI for OAuth

🔧 Refactor authentication to support manual authorization for Hugging Face integration

🔧 Add error handling for authentication process in app.py

🔧 Update authentication flow to support local server and authorization prompt in Spaces

🔧 Improve error handling in Google Drive connection and PDF processing

🔧 Change authentication flow to run in console mode

🚀 Clean push without large files