Fix js build

client/ssh/server/session_handlers_js.go

@@ -0,0 +1,22 @@
+//go:build js
+
+package server
+
+import (
+	"fmt"
+
+	"github.com/gliderlabs/ssh"
+	log "github.com/sirupsen/logrus"
+)
+
+// handlePty is not supported on JS/WASM
+func (s *Server) handlePty(logger *log.Entry, session ssh.Session, _ PrivilegeCheckResult, _ ssh.Pty, _ <-chan ssh.Window) bool {
+	errorMsg := "PTY sessions are not supported on WASM/JS platform\n"
+	if _, err := fmt.Fprint(session.Stderr(), errorMsg); err != nil {
+		logger.Debugf(errWriteSession, err)
+	}
+	if err := session.Exit(1); err != nil {
+		logger.Debugf(errExitSession, err)
+	}
+	return false
+}