Fix fork-wide argument-comment lint failures in TUI files

[dzianisv]

Summary

The fork's rust-ci workflow is failing the Argument comment lint job on PRs that do not touch the affected files. This is blocking otherwise-clean feature branches such as #42 and #48.

Evidence

• PR fix: retry repeated transient stream disconnects #42 failed Argument comment lint in rust-ci
• PR fix: preserve reasoning lineage across interrupted retries #48 failed Argument comment lint in rust-ci
• The reported failures are in untouched TUI files such as codex-rs/tui/src/app.rs and codex-rs/tui/src/chatwidget.rs

Why this matters

This is fork-wide CI debt, not branch-local behavior, so it obscures whether active feature branches are actually merge-ready.

Acceptance criteria

• Argument comment lint passes on main
• PR fix: retry repeated transient stream disconnects #42 and PR fix: preserve reasoning lineage across interrupted retries #48 no longer fail due to unrelated argument-comment lint findings
• Any required /*param_name*/ comments are added or the relevant callsites are refactored to be self-documenting