impl Trait(can run)

src/main.rs

@@ -0,0 +1,13 @@
+use std::io;
+
+use app::App;
+
+mod app;
+mod view;
+
+fn main() -> io::Result<()> {
+    let mut terminal = ratatui::init();
+    let app_result = App::default().run(&mut terminal);
+    ratatui::restore();
+    app_result
+}