feat: add route control bar and fix replay protocol compliance

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>

cameleer3-server-app/src/main/java/com/cameleer3/server/app/controller/AgentCommandController.java

@@ -191,8 +191,9 @@ public class AgentCommandController {
             case "replay" -> CommandType.REPLAY;
             case "set-traced-processors" -> CommandType.SET_TRACED_PROCESSORS;
             case "test-expression" -> CommandType.TEST_EXPRESSION;
+            case "route-control" -> CommandType.ROUTE_CONTROL;
             default -> throw new ResponseStatusException(HttpStatus.BAD_REQUEST,
-                    "Invalid command type: " + typeStr + ". Valid: config-update, deep-trace, replay, set-traced-processors, test-expression");
+                    "Invalid command type: " + typeStr + ". Valid: config-update, deep-trace, replay, set-traced-processors, test-expression, route-control");
         };
     }
 }