Improve application help

tests/tui_workflow.rs

@@ -171,7 +171,7 @@ fn terminal_pty_smoke() {
         let app = wireguard_admin::app::Application::open(fixture.store, states)
             .expect("synthetic application opens");
         let resize = thread::spawn(|| {
-            thread::sleep(Duration::from_millis(40));
+            thread::sleep(Duration::from_millis(230));
             assert!(
                 Command::new("stty")
                     .args(["cols", "40", "rows", "8"])
@@ -219,14 +219,28 @@ fn terminal_pty_smoke() {
         .expect("start isolated pseudo-terminal");
     use std::io::Write as _;
     let mut input = child.stdin.take().expect("script stdin");
-    let exit_key = thread::spawn(move || {
+    let help_workflow = thread::spawn(move || {
         thread::sleep(Duration::from_millis(180));
+        for key in [
+            b"?".as_slice(),
+            b"\x1b[B",
+            b"\x1b[6~",
+            b"\x1b[A",
+            b"\x1b[5~",
+            b"?",
+            b"\x1b",
+        ] {
+            input.write_all(key).expect("send Help navigation key");
+            input.flush().expect("flush Help navigation key");
+            thread::sleep(Duration::from_millis(35));
+        }
+        thread::sleep(Duration::from_millis(70));
         input
             .write_all(b"\x03")
-            .expect("send handled Ctrl-C interruption to synthetic TUI");
+            .expect("send handled Ctrl-C exit to synthetic TUI");
     });
     let output = child.wait_with_output().expect("collect PTY result");
-    exit_key.join().expect("exit input completes");
+    help_workflow.join().expect("Help input completes");
     assert!(
         output.status.success(),
         "synthetic PTY child exits successfully"
@@ -248,6 +262,14 @@ fn terminal_pty_smoke() {
         transcript.contains("\u{1b}[?25h"),
         "cursor restored after TUI"
     );
+    assert!(
+        transcript.contains("Help "),
+        "synthetic PTY entered the Help panel"
+    );
+    assert!(
+        transcript.contains("PgUp/PgDn"),
+        "Help footer advertised page navigation"
+    );
 }
 
 fn shell_quote(value: &str) -> String {