- QrService: generates QR PNG from appointment data, cached in-memory
- GET /api/messaging/qr/:appointmentId serves the image (Gupshup needs URL)
- sendImage added to MessagingProvider + GupshupProvider
- send_appointment_qr tool registered in ToolRegistry
- Flow JSON updated: QR sent after booking confirmation
- Variable interpolation now supports dot notation ({{result.field}})
- SIDECAR_PUBLIC_URL env var for the QR image URL
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
scheduledAt was passed as raw "slot:{id}:{datetime}" — platform rejected
it. Added extract_datetime expression to pull the ISO datetime from the
third segment. Updated flow JSON with SetVariableBlock after slot input.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Groups + Blocks execution model adapted from Typebot:
- FlowExecutionService: walks through groups/blocks, pauses at InputBlocks
- FlowSessionService: Redis-backed session state (24h TTL)
- FlowStoreService: loads flow definitions from data/flows/ JSON files
- FlowVariableService: {{variable}} interpolation + expressions
- ToolRegistry: registered tool handlers (departments, doctors, slots, booking)
- Default appointment-booking.json flow seeded on first run
MessagingService delegates to flow engine when published flows exist,
falls back to hardcoded AI chat otherwise (backward compatible).
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
