Add LunarBirthPicker for bazi and combined forms, converting lunar input to solar for chart calculation.
Co-authored-by: Cursor <cursoragent@cursor.com>
Add liuyao/bazi/combined flows with shared calc and AI infrastructure, 64-gua learn routes, and update Ubuntu PM2 deployment docs for port 3130.
Co-authored-by: Cursor <cursoragent@cursor.com>