## Summary
🤖 Generated with [Nori](https://noriagentic.com/)

- Adds `[tui].custom_working_message_list` to home Nori config so users
can supply their own array of working messages, overriding the builtin
whimsical pool while keeping the existing `custom_working_messages`
on/off toggle from #464.
- Consolidates status-header selection through a single
`pick_status_message(bool, &[String])` helper, fixing a regression where
`on_task_started` ignored the toggle for any task after the first.
- `/config` menu still only edits the boolean; the user list is
TOML-only. The menu entry's description now advertises when a custom
list is active so toggling does not surprise the user.

## Behavior
- `custom_working_messages = false` → plain `Working` (existing).
- `custom_working_messages = true` (default), no list → builtin
whimsical rotation (existing).
- `custom_working_messages = true`, `custom_working_message_list =
["foo", "bar"]` → samples from user list (new).
- `custom_working_messages = false`, list set → still plain `Working`
(bool wins).

## Test Plan
- [x] `cargo test -p codex-core --lib custom_working_message` (5 passed)
- [x] `cargo test -p nori-acp --lib test_nori_config` (7 passed)
- [x] All 1219 nori-tui lib tests pass; new tests for widget,
on_task_started bug fix, and picker description verified GREEN.
- [x] `just fix -p codex-core -p nori-acp -p nori-tui` clean.
- [x] `cargo fmt`.
- [ ] Reviewer: confirm `cargo build --bin nori` and `cargo test -p
tui-pty-e2e` pass in CI.

Share Nori with your team: https://www.npmjs.com/package/nori-skillsets

Co-authored-by: Cliff <clifford@tilework.tech>
Co-authored-by: Nori <contact@tilework.tech>