feat: add Firebase auth/farms backend alongside existing frontend

fix(soybean): correct state→disease map + guard model/label-map class mismatch

feat(compare): continuous health score so field-change detects more

fix(hf): drop red-circle emoji in alerts; cursor renders above modals

feat(hf): deploy the full redesigned frontend (keep in-process inference)

CropIntel — HF Space deploy (all-in-one app)