fix: 修复构建错误并清理未使用导入

src/hid/otg.rs

@@ -6,13 +6,15 @@
 use async_trait::async_trait;
 use parking_lot::Mutex;
 use std::fs::{self, File, OpenOptions};
-use std::io::{Read, Write};
+use std::io::Read;
+use std::os::fd::AsFd;
 use std::os::unix::fs::OpenOptionsExt;
 use std::path::PathBuf;
 use std::sync::atomic::{AtomicBool, AtomicU8, Ordering};
 use std::sync::Arc;
 use std::thread;
 use std::time::Duration;
+use nix::poll::{poll, PollFd, PollFlags, PollTimeout};
 use tokio::sync::watch;
 use tracing::{debug, info, trace, warn};