JASJKASDCKSAQDKS/hackathon-project ? reverse-engineered prompt

Build me a Python app called Jarvis for bar owners that can set up a tenant, migrate existing tenant databases safely, and generate a repeatable demo SQL export I can review and apply to MariaDB. I want a simple dashboard experience that shows when a business has no data yet, guides the user through onboarding, and clearly handles imports, success messages, empty states, and errors without feeling broken.

Please include the phase 1 setup flow from the README, with a command that creates a deterministic sample dataset for about 90 days of bar activity, products, refunds, voids, low stock, and daily summaries. Make sure re running the demo SQL updates the same rows instead of duplicating them.

If there is anything unclear, look up current docs online if you need to, but keep the build focused on this phase 1 scope and do not add the later dashboard or live POS syncing features yet.