plymouth is a core component (COMPONENTS checklist), not an optional app.
Moving plymouth.sh to apps/ left the core dispatch pointing at the deleted
path; also incorrectly added it to modules.conf, duplicating it in the
optional apps checklist.
- Fix core dispatch: $MODULES/optional-Modules/plymouth.sh → $APPS/plymouth.sh
- Remove plymouth from modules.conf (plymouth-custom remains as optional app)
- Regenerate all sentinel regions; conflict block now only has plymouth-custom
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>