Fix navigating to Collab URLs not working when not connected (#59652)

# Objective

- Fix collab channel links opened from URL actions or the CLI when Zed
is signed in but not currently connected to the collab server.

## Solution

- Connect to collab before handling channel joins or channel notes
links.
- Keep downstream errors visible if connecting or opening still fails.

## Self-Review Checklist:

- [x] I've reviewed my own diff for quality, security, and reliability
- [x] Unsafe blocks (if any) have justifying comments
- [x] The content adheres to Zed's UI standards
([UX/UI](https://github.com/zed-industries/zed/blob/main/CONTRIBUTING.md#uiux-checklist)
and
[icon](https://github.com/zed-industries/zed/blob/main/crates/icons/README.md)
guidelines)
- [ ] Tests cover the new/changed behavior
- [x] Performance impact has been considered and is acceptable

---

Release Notes:

- Fixed opening collab links when Zed is not already connected to the
collaboration server.
f36a008905Ben Kunkle committed on 6/25/2026, 8:05:56 PM· committed by GitHubparentec7c11c
1 file changedLine totals unavailable