Collapse home paths in AGENTS.md status summaries (#40502)

## What changed

- Render AGENTS.md paths under the home directory with `~` in `/status`.
- Preserve project-relative paths for instruction files inside or above the current working directory.

## Testing

- Add coverage for home-relative, parent, current-directory, and nested AGENTS.md paths.

GitOrigin-RevId: 6dd1ddf481d95dda9d16f7c03a7431d1297f87ec

codex-rs/tui/src/status/helpers.rs

@@ -11,7 +11,7 @@ use codex_utils_path_uri::PathUri;
 use std::path::Path;
 
 fn normalize_agents_display_path(path: &Path) -> String {
-    dunce::simplified(path).display().to_string()
+    format_directory_display(dunce::simplified(path), /*max_width*/ None)
 }
 
 pub(crate) fn compose_model_display(
@@ -276,6 +276,32 @@ mod tests {
         );
     }
 
+    #[tokio::test]
+    async fn compose_agents_summary_collapses_home_and_preserves_project_relative_paths() {
+        let Some(home) = dirs::home_dir() else {
+            return;
+        };
+        let codex_home = TempDir::new().expect("temp codex home");
+        let cwd = TempDir::new().expect("temp cwd");
+        let mut config = test_config(&codex_home, &cwd).await;
+        config.cwd = home.join("workspace").join("project").abs();
+
+        let paths = [
+            home.join(".codex").join("AGENTS.md"),
+            home.join("workspace").join("AGENTS.md"),
+            config.cwd.join("AGENTS.md").to_path_buf(),
+            config.cwd.join("nested").join("AGENTS.md").to_path_buf(),
+        ]
+        .map(|path| PathUri::from_abs_path(&path.abs()));
+
+        let summary = compose_agents_summary(&config, &paths);
+
+        insta::assert_snapshot!(
+            summary.replace('\\', "/"),
+            @"~/.codex/AGENTS.md, ../AGENTS.md, AGENTS.md, nested/AGENTS.md"
+        );
+    }
+
     #[tokio::test]
     async fn compose_agents_summary_names_global_agents_override() {
         let codex_home = TempDir::new().expect("temp codex home");