shelf-nu/shelf.nu ? reverse-engineered prompt

Build me an open source asset tracking app for teams, where I can keep tabs on equipment, tools, devices, vehicles, and other physical items in one place.

I want users to be able to add assets, print QR codes for them, scan a code with a phone, check items out and back in, reserve equipment on a calendar, and see who currently has what. It should also support locations like buildings, rooms, and shelves, plus custom fields for things like serial numbers, warranty dates, condition, and purchase info.

Please include team roles with different access levels, categories and tags, kits made from multiple assets, search and filters, CSV import and export, reminders for maintenance or expiry dates, and a simple activity log for each item. It should feel polished, work well on mobile, and be set up so multiple organizations can use separate workspaces. If you need to look up current docs online for any libraries or setup details, go ahead.