- Trim prompt 22% (118K->92K chars): condensed thao mai, urgency, merged examples
- Add khach sop section (mua nhieu/don lon)
- Add trend/viral phrases (Gen Z, tu do sang tao)
- Fix product_mapping: add 'vay lien than','dam lien','vay dam' synonyms for Vay lien
- Add CÂM PHAN BODY rule in thao mai section