feat: add Go mock WhatsApp server and chat simulator for testing
sashank1989
7fa810f
- Replace broken Python mock server with Go implementation (fixes HTTP/1.1 EOF errors)
- WhatsApp chat simulator UI at /wa_chat.html with quick-tap buttons
- Vite proxy for mock server at /mock-wa
- Full conversation flow tested: hi → menu → order → done → address → confirm
feat: add per-item comments in POS cart with notes in cumulative KDS view
