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## Why `chatwidget.rs` is still carrying too many unrelated responsibilities in one file. #22269 started a five-phase cleanup to move coherent behavior domains into focused modules while keeping `chatwidget.rs` as the composition layer. #22407 completed phase 2 by extracting input and submission flow, and #22433 completed phase 3 by extracting protocol, replay, streaming, and tool lifecycle handling. This PR is phase 4. It keeps moving high-churn UI coordination out of the central widget by extracting settings, popups, and status surfaces without changing the visible behavior those flows already provide. This is once again a mechanical movement of existing functions. No functional changes. ## What Changed - Added focused modules for runtime settings/model coordination, model/reasoning/collaboration popups, settings/personality/theme/audio/experimental popups, permission prompts, status setup/output controls, and Windows sandbox prompt flows. - Moved the remaining rate-limit nudge/status helpers and connectors popup/loading/update helpers into their existing focused modules. - Preserved the existing picker flows, approval behavior, status/title setup previews, rate-limit notices, and connectors/app list behavior while shrinking `chatwidget.rs` back toward orchestration. - Left `codex-rs/tui/src/chatwidget.rs` as the registration and composition surface for these extracted behaviors. ## Cleanup Phases The five-phase cleanup plan from #22269 is: 1. Phase 1: mechanical helper and state moves. Completed in #22269. 2. Phase 2: extract input and submission flow, including queued user messages, shell prompt submission, pending steer restoration, and thread input snapshot/restore behavior. Completed in #22407. 3. Phase 3: extract protocol, replay, streaming, and tool lifecycle handling, while preserving active-cell grouping, transcript invalidation, interrupt deferral, and final-message separator behavior. Completed in #22433. 4. Phase 4: extract settings, popups, and status surfaces, including model/reasoning/collaboration/personality popups, permission prompts, rate-limit UI, and connectors helpers. This PR. 5. Phase 5: clean up the remaining constructor and orchestration code once the larger behavior domains have moved out, leaving `chatwidget.rs` as the composition layer. ## Verification - `cargo check -p codex-tui` - `cargo test -p codex-tui chatwidget::tests::permissions` - `cargo test -p codex-tui chatwidget::tests::status_surface_previews` - `cargo test -p codex-tui chatwidget::tests::popups_and_settings` - `cargo test -p codex-tui chatwidget::tests::status_and_layout` `cargo test -p codex-tui` also compiles and begins running, but aborts in the unchanged app-side test `app::tests::discard_side_thread_keeps_local_state_when_server_close_fails` with a reproducible stack overflow.