test: make Windows CI fixtures drive-independent

Co-authored-by: Codex noreply@openai.com

codex-rs/app-server/tests/common/rollout.rs

@@ -9,6 +9,7 @@ use codex_protocol::protocol::SessionSource;
 use codex_protocol::protocol::TokenCountEvent;
 use codex_protocol::protocol::TokenUsage;
 use codex_protocol::protocol::TokenUsageInfo;
+use core_test_support::test_path_buf;
 use serde_json::json;
 use std::fs;
 use std::fs::FileTimes;
@@ -189,7 +190,7 @@ fn create_fake_rollout_with_source_and_parent_thread_id(
         forked_from_id: None,
         parent_thread_id,
         timestamp: meta_rfc3339.to_string(),
-        cwd: PathBuf::from("/"),
+        cwd: test_path_buf("/"),
         originator: "codex".to_string(),
         cli_version: "0.0.0".to_string(),
         source,
@@ -279,7 +280,7 @@ pub fn create_fake_rollout_with_text_elements(
         forked_from_id: None,
         parent_thread_id: None,
         timestamp: meta_rfc3339.to_string(),
-        cwd: PathBuf::from("/"),
+        cwd: test_path_buf("/"),
         originator: "codex".to_string(),
         cli_version: "0.0.0".to_string(),
         source: SessionSource::Cli,

codex-rs/external-agent-sessions/src/detect.rs

@@ -404,6 +404,10 @@ mod tests {
             ]),
         )
         .expect("update session");
+        set_modified_at(
+            &session_path,
+            SystemTime::now() + Duration::from_secs(/*secs*/ 1),
+        );
 
         let sessions = detect_recent_sessions(&external_agent_home, root.path()).expect("detect");
         assert_eq!(