[SAAS-018/020] feat: Complete Sales and Commissions modules implementation
Sprint 2 - Sales Frontend:
- Add frontend services, hooks, and pages for Sales module
- Update router with Sales routes
Sprint 3 - Commissions Backend:
- Add Commissions module with entities, DTOs, services, controllers
- Add DDL schema for commissions tables
- Register CommissionsModule in AppModule
Sprint 4 - Commissions Frontend:
- Add frontend services, hooks, and pages for Commissions module
- Add dashboard, schemes, entries, periods, and my-earnings pages
- Update router with Commissions routes
Update submodule references: backend, database, frontend
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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