more world-writable warning improvements (#6389)

3 improvements:
1. show up to 3 actual paths that are world-writable
2. do the scan/warning for Read-Only mode too, because it also applies
there
3. remove the "Cancel" option since it doesn't always apply (like on
startup)

codex-rs/tui/src/app_event.rs

@@ -79,6 +79,12 @@ pub(crate) enum AppEvent {
     #[cfg_attr(not(target_os = "windows"), allow(dead_code))]
     OpenWorldWritableWarningConfirmation {
         preset: Option<ApprovalPreset>,
+        /// Up to 3 sample world-writable directories to display in the warning.
+        sample_paths: Vec<String>,
+        /// If there are more than `sample_paths`, this carries the remaining count.
+        extra_count: usize,
+        /// True when the scan failed (e.g. ACL query error) and protections could not be verified.
+        failed_scan: bool,
     },
 
     /// Show Windows Subsystem for Linux setup instructions for auto mode.