Whatsapp Business support

cmd/server/routes.go

@@ -32,6 +32,9 @@ func (s *Server) setupRoutes() *http.ServeMux {
 	// Serve media files (with auth)
 	mux.HandleFunc("/api/media/", s.handleServeMedia)
 
+	// Business API webhooks (no auth - Meta validates via verify_token)
+	mux.HandleFunc("/webhooks/whatsapp/", s.handleBusinessAPIWebhook)
+
 	return mux
 }