Refactor RDP proxy handling and update related tests

agents/rap-node-agent/cmd/mesh-live-smoke/main.go

@@ -28,6 +28,18 @@ type smokeNode struct {
 	server  *httptest.Server
 }
 
+type smokeSyntheticTransport struct {
+	peers map[string]string
+}
+
+func (t smokeSyntheticTransport) SendSynthetic(ctx context.Context, nextNodeID string, envelope mesh.SyntheticEnvelope) (mesh.SyntheticEnvelope, error) {
+	baseURL := t.peers[nextNodeID]
+	if baseURL == "" {
+		return mesh.SyntheticEnvelope{}, mesh.ErrSyntheticPeerUnavailable
+	}
+	return mesh.NewClient(baseURL).SendSynthetic(ctx, envelope)
+}
+
 type smokeReport struct {
 	Stage                   string         `json:"stage"`
 	ProductionForwarding    bool           `json:"production_forwarding"`
@@ -433,7 +445,7 @@ func writeSmokeScopedConfig(local mesh.PeerIdentity, peers map[string]string, ro
 func newSmokeNode(local mesh.PeerIdentity) *smokeNode {
 	node := &smokeNode{Local: local}
 	node.server = httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		mesh.Server{Local: node.Local, SyntheticRuntime: node.Runtime, FabricSessionEnabled: true}.Handler().ServeHTTP(w, r)
+		mesh.Server{Local: node.Local, SyntheticRuntime: node.Runtime, FabricSessionEnabled: true, FabricSessionWebSocketEnabled: true}.Handler().ServeHTTP(w, r)
 	}))
 	node.URL = node.server.URL
 	return node
@@ -454,7 +466,7 @@ func smokeRuntime(local mesh.PeerIdentity, routes []mesh.SyntheticRoute, peers m
 			mesh.SyntheticChannelFabricControl,
 			mesh.SyntheticChannelRouteControl,
 		},
-		Transport: mesh.NewHTTPPeerTransport(peers),
+		Transport: smokeSyntheticTransport{peers: peers},
 	})
 }