- Add function declarations for all 6 Phase 3 message handlers in VC2022 style
- Add message detection logic without emoji indicators (VC2022 convention):
- PaymentServiceSelectionReq/Res: Payment method selection
- ChargingStatusReq/Res: AC charging status monitoring
- SessionStopReq/Res: Session termination control
- Implement comprehensive helper functions with traditional formatting:
- Payment option analysis (Contract vs External payment)
- Service list parsing and enumeration
- AC charging status with detailed meter information
- Session termination with ChargingSession enum handling
- Maintain VC2022 coding style: no emojis, traditional printf formatting
- All Phase 3 messages now implemented in both C and VC2022
- Ready for final .NET implementation
🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>
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