[iamnbutler]

Fixes the fix-queue item "Team setup and offline section names" (map ^120, ^104; #604, #607, #631).

• Team setup (^120): when a teammate's host is already in a team (or a directory is offered), the first choice reads "Set up a separate directory / Your tailnet already has a team…" instead of "You're the first on this tailnet".
• Team setup from Settings (^120): Settings → Team → Set up… now returns to Settings → Team when Team setup closes (✕, Done, Just me for now). Before, ✕ closed Settings too. Opening from the sidebar still closes cleanly.
• Offline teammate sections (^104): in All Projects, a teammate section's owner is its own part of the header, so the project name is shortened first and the owner and · Offline stay visible. The header's title shows the full name on hover.
• No re-sorting (^104): projects are added in channel creation order rather than the host's listing order. While a peer is offline, its listings move behind the directory's, and that used to re-sort projects known only through its channels.

Smoke-tested on an isolated bun ace serve from this lane (own ACE_HOME, config and keychain, port 5170), driven with headless Playwright:

• With a teammate peer injected into team-peers, the fork shows the new copy with Join your team pre-selected. Closing it after opening from Settings → Team leaves exactly one dialog, Settings on Team. Opening from the sidebar and closing leaves none.
• With an offline teammate channel injected into the listing, the header in a narrow sidebar reads a… · samechocolixir · Offline, and its title/aria-label carry the full name.
• With the listing order flipped, this build keeps the same section order. The old projects.ts, rebuilt and run on the same flipped input, swaps them.

I first tried stacking Team setup over Settings. Base UI then mounted extra Settings dialogs behind it, so I switched to returning to the section instead.

Built in Ace

No. A Claude Code fix-train worker (fixw17) built this from a terminal, and headless Playwright drove an isolated bun ace serve. Ace has no way yet to run this queue's parallel agents or browser automation against a separate host instance (#5).