- Add INVOICE_SERVICE token to DI container
- Register InvoiceService in base module with proper lifecycle
- Update market store to use dependency injection instead of singleton
- Remove exported singleton from InvoiceService class
- Add comprehensive migration documentation with examples
- Maintain type safety with proper TypeScript interfaces
This migration eliminates the legacy singleton pattern and improves:
- Testability through service injection
- Modular architecture with clear boundaries
- Single source of truth for service instances
- Consistent dependency injection patterns
🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>
