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-core/src/main/java/com/cameleer3/server/core/agent/CommandType.java

@@ -8,5 +8,6 @@ public enum CommandType {
     DEEP_TRACE,
     REPLAY,
     SET_TRACED_PROCESSORS,
-    TEST_EXPRESSION
+    TEST_EXPRESSION,
+    ROUTE_CONTROL
 }