From a Simple Rust Gym Log to an Offline-First Gym OS

This is a submission for the GitHub Finish-Up-A-Thon Challenge What I Built I built brawnbuild: an offline-first Gym OS designed for people who want to train with consistency, track progression, and not depend on internet or noisy social features. Before Copilot helped me evolve this project, the idea was very simple: Build an app for my own gym sessions. Log workouts. Track evolution by muscle and exercise. Use Rust in the backend. That was the original scope. During this challenge, it grew into a polished product demo with: A Rust backend (Axum + SQLite) serving a local exercise catalog. A local-first data pipeline that consolidates heterogeneous exercise datasets into one unified source. Deterministic local import flow so demos are reproducible and resilient. Stronger web product narrative and presentation. Security and quality engineering upgrades (tests, CI checks, and coverage gates). Demo Repository: https://github.com/lucasrafaldini/brawnbuild