New rules added:
- Two LLM work modes: Execution (fazer) vs Review (conferir)
- HTMX-first frontend: minimize JS at maximum
- Local assets only: no CDN references
- Server returns HTML fragments, not JSON
- No dead code: implement real code, never use _ prefix
- cargo audit must pass with 0 warnings
- Documentation rules: Rust code only in architecture docs
- Added HTMX patterns and examples
