refactor(ssh): 优化公共密钥类型引用及代理客户端连接返回类型

- 将 check_server_key 函数中 server_public_key 参数类型统一为 PublicKey
- 调整 connect_agent_client 函数返回类型为 agent::client::AgentClient
- 保持异步连接逻辑并改进错误信息处理

Author: feigeCode

crates/ssh/src/ssh.rs

@@ -144,7 +144,7 @@ impl client::Handler for RusshHandler {
 
     async fn check_server_key(
         &mut self,
-        _server_public_key: &ssh_key::PublicKey,
+        _server_public_key: &PublicKey,
     ) -> Result<bool, Self::Error> {
         Ok(true)
     }
@@ -295,7 +295,7 @@ where
 #[cfg(unix)]
 async fn connect_agent_client(
     messages: &AuthFailureMessages,
-) -> Result<russh::keys::agent::client::AgentClient<tokio::net::UnixStream>> {
+) -> Result<agent::client::AgentClient<tokio::net::UnixStream>> {
     russh::keys::agent::client::AgentClient::connect_env()
         .await
         .map_err(|e| anyhow::anyhow!("{}: {}", messages.agent_connect_failed, e))