- Remove DatabaseService abstraction layer from API routes
- Implement FastAPI dependency injection for repositories
- Create leggen/api/dependencies.py with factory functions
- Update routes to use AccountRepo, BalanceRepo, TransactionRepo directly
- Refactor SyncService to use repositories instead of DatabaseService
- Deprecate DatabaseService with warnings for backward compatibility
- Update all tests to use FastAPI dependency overrides pattern
- Fix mypy type errors in routes
Benefits:
- Simpler architecture with one less abstraction layer
- More explicit dependencies via function signatures
- Better testability with FastAPI's app.dependency_overrides
- Clearer separation of concerns
All 114 tests passing, mypy clean.
