## Why
When the TUI upgrade flow moves a user to a newer model, the accepted
migration should also persist the target model's default reasoning
effort. That keeps the upgraded model and reasoning setting aligned
instead of carrying forward a stale previously saved effort from the old
model.
## What changed
- The accepted model migration path now updates in-memory config, TUI
state, and persisted model selection with the target preset's
`default_reasoning_effort`.
- The upgrade destructuring keeps `reasoning_effort_mapping` explicitly
unused because mappings are no longer consulted on accepted migrations.
- Added a catalog test that starts with a pre-existing saved reasoning
effort and verifies the accepted upgrade overwrites it with the target
model default and emits the expected persistence events.
- Rebasing onto current `main` also updates a TUI thread-session test
helper for the latest `permission_profile` field and
`ApprovalsReviewer::AutoReview` rename so CI compiles on the new base.
## Verification
- `cargo test -p codex-tui model_catalog`
- `cargo test -p codex-tui
permission_settings_sync_updates_active_snapshot_without_rewriting_side_thread`
Fixes stale test fixtures left after the active bundled model catalog
updates in #18586 and #18388. Those changes made `gpt-5.4` the current
default and removed several older hardcoded slugs, which left Windows
Bazel shards failing TUI and config tests.
What changed:
- Refresh TUI model migration, availability NUX, plan-mode, status, and
snapshot fixtures to use active bundled model slugs.
- Update the config edit test expectation for the TOML-quoted
`"gpt-5.2"` migration key.
- Move the model catalog tests into
`codex-rs/tui/src/app/tests/model_catalog.rs` so touching them does not
trip the blob-size policy for `app.rs`.
Verification:
- CI Bazel/lint checks are expected to cover the affected test shards.