8b0d473fcd
Add ROUTE_CONTROL command type and route-control mapping in
AgentCommandController. New RouteControlBar component in the exchange
header shows Start/Stop/Suspend/Resume actions (grouped pill bar) and
a Replay button, gated by agent capabilities and OPERATOR/ADMIN role.
Fix useReplayExchange hook to match protocol section 16: payload now
uses { routeId, exchange: { body, headers }, originalExchangeId, nonce }
instead of the flat { headers, body } format.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>