docs(phase-12): complete phase execution
Phase 12 (Offer Editor: Tier A/B/C, Tag & Prezzo Pubblico) fully executed
and verified. All 5 plans complete, build gate passed, 5/5 requirements
confirmed in codebase (OFFER-11, OFFER-15, OFFER-16, OFFER-17, OFFER-18).
- 12-REVIEW.md: 0 critical, 6 warnings, 4 info (advisory, non-blocking)
- 12-VERIFICATION.md: all requirements PASS
- REQUIREMENTS.md: OFFER-11/15/16/17/18 → Complete
- STATE.md: advanced to Phase 13 as next
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
simone
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