The Control UI sessions roster now leads with operator telemetry: overview
tiles (sessions / live / unread / tokens), per-kind row avatars with a live-run
dot, compact token values with context-usage meters (ok/warn/danger at
65%/85%), initial-load skeleton rows, and icon-led empty states. Stale token
snapshots render as ~approximations with a neutral meter and never drive
warning tones, matching the chat composer convention; the overview token sum
counts only known snapshots (~ when partial, n/a when none). Label chips
ellipsize instead of overflowing sticky columns; <=500px drops the avatar to
preserve the key column budget.
Closes#102517
5c3c5c0ee4
