Feature request: Filter and paginate Codex tasks in the thread list API

Problem

The thread-list API mixes ordinary ChatGPT conversations and Codex tasks under one shared maximum of 50 non-pinned results. Users with hundreds of regular chats may receive only a small subset of their Codex tasks, preventing a task organizer from reliably covering all Codex work.

Client-side filtering or sorting is insufficient because it occurs after the 50-item truncation.

Requested improvements

1. Server-side filtering by thread kind, for example Codex tasks only.
2. Pagination or cursor-based retrieval for the thread list.
3. Optionally, a Codex-task-first ordering mode.

This would let task-management workflows reliably enumerate and organize Codex tasks without requiring users to archive large numbers of unrelated ChatGPT conversations.