Refactor app.py to replace Google Sheets integration with MongoDB. Removed gspread and related credentials, added pymongo for database connection. Updated data retrieval methods to fetch data from MongoDB collections. Adjusted UI elements and cleaned up unused code.

Update app.py

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Update app.py

Update app.py

Update app.py

Update app.py

Update app.py

Update app.py

Update app.py

Update app.py

Update app.py

Update app.py

Update app.py

Update app.py

Create app.py