Each account row in the Account pool card has a pencil: tick the users
whose sessions run on it (one moves off any other account, unticking sends
one back to the balancer). PUT /api/accounts/:name/users saves the set in one
transaction, audits each change and switches a Claude login into each added
user's home at once. The card-level switch button and pinned list are gone.
PUT /api/accounts/pins (and agenthub accounts pin) now writes a pinned
Claude login into the user's home right away (claude-pool.switchHome):
every home's newer pair is copied back first, the member's own login is
never written over, and no pane is restarted — running sessions take the
new pair at their next credentials read. A live home stays on the login it
holds, so unpinning does not flip it back. The Users page calls it
"Switch a user's account" and says what happened.
An admin pins a server-mode user to one pool account per tool
(account_pins; PUT /api/accounts/pins with the password step-up and audit,
the Users page's Pin a user, agenthub accounts pin|unpin). The workspace
owner's pin wins over the balancer whenever the pane may use the account;
a pinned login still waits while another pool login holds the home.