fix(mail): include guest list in RSVP emails

server/internal/api/handlers.go

@@ -105,7 +105,11 @@ func (s *Server) handleRSVP(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	if err := s.mailer.SendRSVP(rsvp); err != nil {
+	allGuests, err := s.store.ListGuests()
+	if err != nil {
+		log.Printf("rsvp: list guests failed: %v", err)
+	}
+	if err := s.mailer.SendRSVP(rsvp, allGuests); err != nil {
 		log.Printf("rsvp: email failed: %v", err)
 	}
 	if err := s.webhook.SendRSVP(rsvp); err != nil {

server/internal/mail/mail.go

@@ -58,7 +58,7 @@ func (m *Mailer) send(subject, body string) error {
 	return smtp.SendMail(addr, auth, m.cfg.From, recipients, []byte(msg))
 }
 
-func (m *Mailer) SendRSVP(r store.RSVP) error {
+func (m *Mailer) SendRSVP(r store.RSVP, allGuests []store.Guest) error {
 	names := make([]string, len(r.Guests))
 	adults, children := 0, 0
 	for i, g := range r.Guests {
@@ -77,6 +77,22 @@ func (m *Mailer) SendRSVP(r store.RSVP) error {
 	if r.Message != "" {
 		fmt.Fprintf(&b, "\nMessage:\n%s\n", r.Message)
 	}
+
+	if len(allGuests) > 0 {
+		totalAdults, totalChildren := 0, 0
+		fmt.Fprintf(&b, "\nRSVPs so far (%d guest(s)):\n", len(allGuests))
+		for _, g := range allGuests {
+			if g.IsChild {
+				totalChildren++
+				fmt.Fprintf(&b, "- %s (child)\n", g.Name)
+			} else {
+				totalAdults++
+				fmt.Fprintf(&b, "- %s\n", g.Name)
+			}
+		}
+		fmt.Fprintf(&b, "\n%d adult(s), %d child(ren) total\n", totalAdults, totalChildren)
+	}
+
 	return m.send(fmt.Sprintf("RSVP from %s", joined), b.String())
 }