Architectural Overview

4.1 High-level architecture

React Mobile-First Frontend
        |
        v
Fiber HTTP API
        |
        v
Application Layer / Use Cases
        |
        v
Domain Modules
  - Auth
  - People
  - Collaborators
  - Reference Data
  - Work Period Planning
  - Mine Production
  - Gold Pricing
  - Price List
  - Expenses
  - Earnings
  - Current Account Ledger
  - Journey Closure
  - Reports
        |
        v
GORM Repositories
        |
        v
SQLite

4.2 Recommended module boundaries

1. auth
2. people
3. collaborators
4. reference_data
5. work_periods
6. planning
7. mine_production
8. gold_prices
9. price_list
10. expenses
11. earnings
12. ledger
13. journey_closure
14. reports
15. audit