Make connection status detail reachable and quieter to announce

Reload carries the detail as its tooltip and description, and touch
phones write it under the label. The phone status row overlays the
document instead of pushing it down. The live region speaks only the
label, stays silent on load, and says Reconnected once after an outage.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>