Kartik-Doye/CPIL-Data_dashboard ? reverse-engineered prompt

Build me a GO Gas executive dashboard that shows live sales, station, team, and forecast history from PostgreSQL. I want it to feel like a clean internal reporting app, with charts and summary views that make it easy to see what is happening across the business at a glance.

The important part is that it should only use PostgreSQL data, if the database is down or the required tables do not have data, the app should show a clear error instead of falling back to any spreadsheet or fake data. Please include a simple way to verify the database connection and schema before the dashboard loads, and a way to load the sales spreadsheet into PostgreSQL when needed.

Make it work as a local app that I can run easily with a dev command, and include sensible setup steps for environment settings. If you need to check current docs or best practices while building it, go ahead and look them up online.