The app can keep any number of named libraries and switch between them
from the top bar or Info → Libraries. Each can sync to the account's other
devices or stay on this one (a scratch library to try things in).
The sync server now keeps several libraries per user under
/api/libraries; a migration makes each existing library the user's default
"Main", which /api/library keeps serving for older app builds. Every sync
lines the device's libraries up with the account's: new ones elsewhere are
downloaded, new ones here created on the server, ones deleted elsewhere
flagged rather than thrown away. The existing library keeps its files and
merge base, so upgrading asks nothing.
Garrett Mills
81b1df8c9f