- Header h2 inside the Active group now says "Active" (matches
the renamed tab) instead of "Running".
- Both context-menu Reconnect entries (the normal one and the
recover-from-vanished-process fix) say "Reconnect tmux" so the
user knows what the action actually does.
- Sibling cookbook-server-section-* blocks inside the Active group
get a top divider + 14px gap so transitions between server
groups (local / remote-host / etc) read clearly.