`quak files` with a collection ID used to wait for a full refresh, which
on an empty cache fetched the files of every collection in the account.
It now reads the collection list, then that one collection's files
through the new `Library.freshFiles()`, and stores nothing. The files
print in the server's order, and no refresh progress lines appear. Each
file prints once, as the latest copy the server sent. `quak files`
without a collection ID still waits for a refresh.
Some tests ran `quak files` with a collection ID to fill the cache, to
show a refresh's progress or to show what `-q` hides. They now run a
command that still refreshes.
Model: opus-5-5
sneak