refactor: 将 lazy_static 和 atty 替换为标准库实现以减少依赖

src/utils/mod.rs

@@ -62,7 +62,7 @@ pub fn password_input(prompt: &str) -> Result<String> {
 
 /// Check if running in a terminal
 pub fn is_terminal() -> bool {
-    atty::is(atty::Stream::Stdout)
+    std::io::IsTerminal::is_terminal(&io::stdout())
 }
 
 /// Format duration in human-readable format