borffomensah/LoadOptimizeAI ? reverse-engineered prompt

Build me a simple workload forecasting app that predicts future workload from historical weekly data. I want it to take in a time series, clean and prepare the data, show some basic trend and seasonality charts, then compare a couple of forecasting approaches like ARIMA and Prophet and tell me which one performs best using MAE, MSE, and RMSE.

Please make the experience easy to use in a browser with a clean Streamlit interface, where someone can upload or load data, run the forecast, and see the predicted workload for future weeks along with the actual history on a chart. If you need to, look up current docs online for any library details.

It should feel like a practical tool for resource planning and capacity management, not a research demo. If there is already a saved model file in the project, use that when possible, and make sure the app can run smoothly from the main entry point.