I need a production-ready Flutter Android application backed by Firebase (Firestore + Auth) that functions as a compact CRM for tracking enquiries and disciplined follow-ups. Core features: • Enquiry form with dependent dropdown logic (e.g., category → model) • Conditional fields (exchange toggle reveals model & value) • Expected purchase date and next follow-up date logic • Status workflow: Interested, Follow-up Needed, Purchased, Competition, Not Interested • Next follow-up date mandatory for Interested and Follow-up Needed • Priority tag (Hot/Casual) • Auto timestamp, source, and owner tracking All enquiries stored in Cloud Firestore. Follow-up dashboard must support filters: • Today • Overdue • Upcoming • Custom date range Authentication: • Phone OTP via Firebase Auth • Role-based Firestore security rules Admin: full access Staff: access only to their own enquiries Android-only build. Tapping phone number must launch native dialer and return to app. Deliverables: • Well-commented Flutter source code • Firebase configuration • Firestore security rules • Signed release APK • README (setup, build, role configuration) • 60–90 days bug-fix support Expected timeline: 15–20 days. I will test by running flutter run, installing the APK, validating OTP login, verifying role restrictions, confirming dropdown dependencies, and checking date-based filtering.