- Move people badge + panel from fixed position to inline in .rstack-tab-row
- Badge sits right of the layer toggle icon with a subtle separator
- Panel drops down from badge position instead of floating fixed
- Online/Offline toggle replaces Solo/Multi labels for clarity
- Badge shows "Offline" with gray dot when in offline mode
- Mobile: hide text label, show dots only
- Tab bar gets flex:1 + min-width:0 to share row space
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>