- Add plugin bank sync providers to CreateAccountModal alongside existing providers
- Extend SelectLinkedAccountsModal to handle plugin accounts with unified interface
- Implement backend API handlers: bank-sync-providers-list, bank-sync-accounts, bank-sync-accounts-link
- Add linkAccountPlugin action for Redux state management
- Maintain full backward compatibility with existing GoCardless, SimpleFIN, Pluggy.ai providers
- Type-safe integration with proper TypeScript definitions
- Placeholder implementations ready for real plugin functionality
This enables the plugin architecture for bank sync while preserving existing functionality, ready for feature flag control.
