Restore codex-tui resume hint on exit (#17415)

Addresses #17303

Problem: The standalone codex-tui entrypoint only printed token usage on
exit, so resumable sessions could omit the codex resume footer even when
thread metadata was available.

Solution: Format codex-tui exit output from AppExitInfo so it includes
the same resume hint as the main CLI and reports fatal exits
consistently.

codex-rs/tui/src/main.rs

@@ -2,9 +2,37 @@ use clap::Parser;
 use codex_app_server_client::legacy_core;
 use codex_arg0::Arg0DispatchPaths;
 use codex_arg0::arg0_dispatch_or_else;
+use codex_tui::AppExitInfo;
 use codex_tui::Cli;
+use codex_tui::ExitReason;
 use codex_tui::run_main;
 use codex_utils_cli::CliConfigOverrides;
+use supports_color::Stream;
+
+fn format_exit_messages(exit_info: AppExitInfo, color_enabled: bool) -> Vec<String> {
+    let AppExitInfo {
+        token_usage,
+        thread_id,
+        thread_name,
+        ..
+    } = exit_info;
+
+    let mut lines = Vec::new();
+    if !token_usage.is_zero() {
+        lines.push(codex_protocol::protocol::FinalOutput::from(token_usage).to_string());
+    }
+
+    if let Some(resume_cmd) = legacy_core::util::resume_command(thread_name.as_deref(), thread_id) {
+        let command = if color_enabled {
+            format!("\u{1b}[36m{resume_cmd}\u{1b}[39m")
+        } else {
+            resume_cmd
+        };
+        lines.push(format!("To continue this session, run {command}"));
+    }
+
+    lines
+}
 
 #[derive(Parser, Debug)]
 struct TopCli {
@@ -31,12 +59,17 @@ fn main() -> anyhow::Result<()> {
             /*remote_auth_token*/ None,
         )
         .await?;
-        let token_usage = exit_info.token_usage;
-        if !token_usage.is_zero() {
-            println!(
-                "{}",
-                codex_protocol::protocol::FinalOutput::from(token_usage),
-            );
+        match exit_info.exit_reason {
+            ExitReason::Fatal(message) => {
+                eprintln!("ERROR: {message}");
+                std::process::exit(1);
+            }
+            ExitReason::UserRequested => {}
+        }
+
+        let color_enabled = supports_color::on(Stream::Stdout).is_some();
+        for line in format_exit_messages(exit_info, color_enabled) {
+            println!("{line}");
         }
         Ok(())
     })