优化修改sshd客户端的welcome界面提示

sshd/client/client.go

@@ -286,9 +286,9 @@ func printWelcome(pingState *atomic.Bool) {
 	fmt.Printf("客户端ID: %s\n", coupler.machineID)
 	state := ""
 	if pingState.Load() {
-		state = "已连接 ✅"
+		state = "√ 已连接"
 	} else {
-		state = "未连接 ❌"
+		state = "x 未连接"
 	}
 	fmt.Printf("设备状态: %s\n\n", state)
 }