what is keychain-public fr?

Keychain is a mobile app that lets building managers and employees unlock doors at commercial properties using their phone instead of physical keys. It works on both iPhone and Android, so a facility manager could open the front entrance, server room, or conference space with a swipe gesture on their device rather than fumbling with a keycard or key. The core experience is simple: users see a list of doors they have access to, swipe across one to unlock it, and get immediate visual feedback, a green progress bar fills as they swipe, and the door clicks when it unlocks. Beyond unlocking, the app tracks every door opening like a security log. It records who opened which door and when, so managers can search through a history of access events and see exactly who entered the building and when. You can filter by person, door, or date the same way you'd use filters in a spreadsheet. This was a professional project built for Oldcastle Building Envelope, a commercial real estate company. The app was created by a team of engineers from Fullstack Academy, with the developer of this repo contributing specific features like the swipe-to-unlock interaction and the event log page. Companies use tools like this to improve security (no lost keys to replace) and simplify access management across multiple locations and employees. The README doesn't go into detail about how the app connects to actual smart-lock hardware or the backend system that tracks and stores door events, but the focus is clearly on building a smooth, intuitive user experience for the unlock action and providing transparency through access logs.