Keep the agents overview open when there is no chat to return to (#60271)

## What changed

Only allow the cancel action to dismiss the agents overview when a chat is displayed or a startup thread is pending. Hide the `esc back` footer hint when there is no chat to return to, while retaining back hints for help and metadata editing.

## Testing

Add coverage for returning to a chat that is still starting and for pressing Escape in the overview after cancelling folder trust. Update snapshots and test setup to reflect whether a chat is available.

GitOrigin-RevId: af259330eb2a743fde449bbbd47c7f0eb6fa937e

codex-rs/cli/tests/daemon_startup.rs

@@ -32,12 +32,6 @@ async fn agents_defers_launch_directory_trust_until_starting_a_task() -> Result<
     daemon_startup("agents-untrusted").await
 }
 
-#[tokio::test]
-#[cfg(unix)]
-async fn agents_checks_trust_when_starting_after_dismissing_overview() -> Result<()> {
-    daemon_startup("agents-untrusted-new").await
-}
-
 #[tokio::test]
 #[cfg(unix)]
 async fn discovered_managed_daemon_can_restart_with_auto_start_disabled() -> Result<()> {
@@ -202,7 +196,7 @@ async fn daemon_startup(command: &str) -> Result<()> {
                 ""
             },
             serde_json::to_string(&workspace_path)?,
-            if command.starts_with("agents-untrusted") {
+            if command == "agents-untrusted" {
                 "untrusted"
             } else {
                 "trusted"
@@ -246,7 +240,6 @@ async fn daemon_startup(command: &str) -> Result<()> {
             | "agents"
             | "agents-no-daemon"
             | "agents-untrusted"
-            | "agents-untrusted-new"
             | "discovered"
             | "bedrock"
             | "bedrock-running"
@@ -316,18 +309,13 @@ async fn daemon_startup(command: &str) -> Result<()> {
             "Notconnectedtothelocalbackgroundserver"
         } else if command == "agents" {
             args.push("agents".into());
-            steps.push_back(("Notasksyet", b"\x1b"));
+            steps.push_back(("Notasksyet", b"n"));
             steps.push_back(("GPT-5.6-Terra", b"/daemon\r"));
             steps.push_back(("Restartbackgroundserver", b"\x1b[F\r"));
             "Restartbackgroundserver?"
-        } else if command.starts_with("agents-untrusted") {
+        } else if command == "agents-untrusted" {
             args.push("agents".into());
-            if command == "agents-untrusted-new" {
-                steps.push_back(("Notasksyet", b"\x1b"));
-                steps.push_back(("GPT-5.6-Terra", b"/new\r"));
-            } else {
-                steps.push_back(("Notasksyet", b"n"));
-            }
+            steps.push_back(("Notasksyet", b"n"));
             "entercontinue·escback"
         } else if command == "discovered" {
             args.extend(["--disable".into(), "daemon_auto_start".into()]);

codex-rs/cli/tests/snapshots/daemon_startup__agents_overview_before_folder_consent.snap

@@ -41,7 +41,7 @@ expression: transition
                                                                               │
                                                                               │
                                                                               │
-  ? help  esc back  ↑/↓ move  enter open  n new
+  ? help  ↑/↓ move  enter open  n new
 
 --- Start a task ---