refactor: extract terminal guard

src/terminal.rs

@@ -0,0 +1,22 @@
+use crossterm::{
+  ExecutableCommand,
+  terminal::{EnterAlternateScreen, LeaveAlternateScreen, disable_raw_mode, enable_raw_mode},
+};
+use std::io::{self, stdout};
+
+pub struct TerminalGuard;
+
+impl TerminalGuard {
+  pub fn new() -> Result<Self, io::Error> {
+    enable_raw_mode()?;
+    stdout().execute(EnterAlternateScreen)?;
+    Ok(TerminalGuard)
+  }
+}
+
+impl Drop for TerminalGuard {
+  fn drop(&mut self) {
+    let _ = disable_raw_mode();
+    let _ = stdout().execute(LeaveAlternateScreen);
+  }
+}