Add mcp route command for managing mc-proxy routes

New top-level command with list, add, remove subcommands. Supports
-n/--node to target a specific node. Adds AddProxyRoute and
RemoveProxyRoute RPCs to the agent. Moves route listing from
mcp node routes to mcp route list.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

internal/agent/proxy_rpc.go

@@ -4,7 +4,10 @@ import (
 	"context"
 	"fmt"
 
+	"git.wntrmute.dev/mc/mc-proxy/client/mcproxy"
 	mcpv1 "git.wntrmute.dev/mc/mcp/gen/mcp/v1"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
 	"google.golang.org/protobuf/types/known/timestamppb"
 )
 
@@ -44,3 +47,65 @@ func (a *Agent) ListProxyRoutes(ctx context.Context, _ *mcpv1.ListProxyRoutesReq
 
 	return resp, nil
 }
+
+// AddProxyRoute adds a route to mc-proxy.
+func (a *Agent) AddProxyRoute(ctx context.Context, req *mcpv1.AddProxyRouteRequest) (*mcpv1.AddProxyRouteResponse, error) {
+	if req.GetListenerAddr() == "" {
+		return nil, status.Error(codes.InvalidArgument, "listener_addr is required")
+	}
+	if req.GetHostname() == "" {
+		return nil, status.Error(codes.InvalidArgument, "hostname is required")
+	}
+	if req.GetBackend() == "" {
+		return nil, status.Error(codes.InvalidArgument, "backend is required")
+	}
+
+	if a.Proxy == nil {
+		return nil, status.Error(codes.FailedPrecondition, "mc-proxy not configured")
+	}
+
+	route := mcproxy.Route{
+		Hostname:   req.GetHostname(),
+		Backend:    req.GetBackend(),
+		Mode:       req.GetMode(),
+		BackendTLS: req.GetBackendTls(),
+	}
+
+	if err := a.Proxy.AddRoute(ctx, req.GetListenerAddr(), route); err != nil {
+		return nil, fmt.Errorf("add route: %w", err)
+	}
+
+	a.Logger.Info("route added",
+		"listener", req.GetListenerAddr(),
+		"hostname", req.GetHostname(),
+		"backend", req.GetBackend(),
+		"mode", req.GetMode(),
+	)
+
+	return &mcpv1.AddProxyRouteResponse{}, nil
+}
+
+// RemoveProxyRoute removes a route from mc-proxy.
+func (a *Agent) RemoveProxyRoute(ctx context.Context, req *mcpv1.RemoveProxyRouteRequest) (*mcpv1.RemoveProxyRouteResponse, error) {
+	if req.GetListenerAddr() == "" {
+		return nil, status.Error(codes.InvalidArgument, "listener_addr is required")
+	}
+	if req.GetHostname() == "" {
+		return nil, status.Error(codes.InvalidArgument, "hostname is required")
+	}
+
+	if a.Proxy == nil {
+		return nil, status.Error(codes.FailedPrecondition, "mc-proxy not configured")
+	}
+
+	if err := a.Proxy.RemoveRoute(ctx, req.GetListenerAddr(), req.GetHostname()); err != nil {
+		return nil, fmt.Errorf("remove route: %w", err)
+	}
+
+	a.Logger.Info("route removed",
+		"listener", req.GetListenerAddr(),
+		"hostname", req.GetHostname(),
+	)
+
+	return &mcpv1.RemoveProxyRouteResponse{}, nil
+}