refactor(web): the add environment dialog owns its form state

Typing in the dialog's fields re-rendered the whole connections page; the
fields, SSH host discovery, and submit handlers now live in
AddEnvironmentDialog.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
bd8e39916cJulius Marminge committed on 10/21/2026, 6:12:45 PMparent9179178

Checks

All checks passed
2 files changedLine totals unavailable