The roster menu gated "New Group Chat" on `activeSourceRoster.length < 2`
(local-source rows only) while the dialog it opens seats the FULL
multi-source roster (`selectableRoster = roster.filter(bot => !bot.ghost)`,
`canCreate = selected.length >= 2`). With one local bot and any number of
remote-connection bots the door stayed shut on a room the dialog would
happily create; users added a throwaway local bot just to click through.
The gate now counts the same selectable set as the dialog.
Live repro (real Electron + a real second `hermes serve` registered as a
remote connection): e2e/group-create-gate-remote-roster — base: menu entry
`aria-disabled="true"` with 1 local + 2 remote rows in the roster; head:
enabled, dialog seats Hermes + the remote Inbox, "Create Group (2)" enabled.
Co-authored-by: FalconOrtiz <falcon.ortiz11@gmail.com>
Co-authored-by: neil771 <neil@lannscapital.com>
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