feat(settings): add the Add OTP, Add code and Manage entry forms with a PIN queue for locked entries

The full phone settings form (README 10.2) and its processing (10.3) as one
resumable job: Import, Add OTP, Add code, Manage, then the About fields.
Forms are applied only when their switch is on, cleared afterwards (secret
first; only the secret after a problem), deduplicated by keyed hash, and
report into their Result field and the results screen.

- Add OTP validates per README 10.4; Add code runs the real encoder
  (CodeCheck, a job for 2D codes) and caches 2D codes on the way in.
- Manage entry: edit, move, require/drop PIN, replace, counter, delete.
  Changes to locked entries are sealed under "q" and applied only after
  the PIN is entered under "Phone changes" in the menu.
- About: catalog (800 characters max), version, storage use.
- "Encrypt names" now applies to new and existing entries.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

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