codex

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Eric Traut 7fa0007ea8 tui: split remaining composer draft and footer state (#22656 )

## Why

[#22581](https://github.com/openai/codex/pull/22581) started separating
the chat composer’s responsibilities, but `ChatComposer` still owned the
remaining editable draft state alongside footer/status presentation
state. This follow-up makes those ownership lines explicit so future
composer changes have a smaller blast radius and `BottomPane` does not
need to keep exposing scattered draft getters.

This is just a refactor. No functional or behavioral changes are
intended.

## What changed

- Move the remaining editable composer state into
`bottom_pane/chat_composer/draft_state.rs`.
- Move footer and status-row presentation state into
`bottom_pane/chat_composer/footer_state.rs`.
- Add an internal `ComposerDraftSnapshot` for restore flows, replacing
several ad hoc `BottomPane` pass-through reads.
- Rewire the related history-search and thread-input restore paths to
use the extracted state.

## Verification

- `RUST_MIN_STACK=8388608 cargo test -p codex-tui`
- `cargo insta pending-snapshots`

2026-05-15 09:12:52 -07:00