preserve legacy names in thread list

codex-rs/rollout/src/recorder.rs

@@ -1809,12 +1809,20 @@ fn thread_item_from_state_list_item(item: codex_state::ThreadListItem) -> Thread
     let source = serde_json::from_str(item.source.as_str())
         .or_else(|_| serde_json::from_value(Value::String(item.source)))
         .unwrap_or(SessionSource::Unknown);
+    let name = item
+        .name
+        .filter(|name| !name.trim().is_empty())
+        .or_else(|| {
+            let title = item.title.trim();
+            (!title.is_empty() && item.first_user_message.as_deref().map(str::trim) != Some(title))
+                .then(|| item.title.clone())
+        });
     ThreadItem {
         path: item.rollout_path,
         thread_id: Some(item.id),
         first_user_message: item.first_user_message,
         preview: item.preview,
-        name: item.name,
+        name,
         cwd: Some(item.cwd),
         git_branch: item.git_branch,
         git_sha: item.git_sha,