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- CLAUDE.md: add Code Standards section with backend and frontend shared module maps, component architecture rules, duplication checklist, and no-dead-code enforcement rule - SECURITY.md: Phase 02 + 03 security audit results (all threats CLOSED) - .planning: update milestone audit, config, and add plan/UAT files for phases 01, 02-06, and 06.2-05 Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>