fix(ui): stabilize theme colors and calendar end time

server/internal/api/handlers.go

@@ -58,6 +58,7 @@ func (s *Server) handleConfig(w http.ResponseWriter, r *http.Request) {
 	writeJSON(w, http.StatusOK, map[string]string{
 		"siteUrl":      s.cfg.Site.URL,
 		"weddingDate":  s.cfg.Wedding.Date.Format(time.RFC3339),
+		"eventEnd":     s.cfg.Wedding.EventEnd.Format(time.RFC3339),
 		"ceremonyTime": s.cfg.Wedding.CeremonyTime,
 		"rsvpByDate":   s.cfg.Wedding.RSVPBy.Format(time.RFC3339),
 		"venueName":    s.cfg.Wedding.VenueName,

server/internal/config/config.go

@@ -35,6 +35,7 @@ type SiteConfig struct {
 
 type WeddingConfig struct {
 	Date         time.Time `yaml:"date"`
+	EventEnd     time.Time `yaml:"event_end"`
 	CeremonyTime string    `yaml:"ceremony_time"`
 	RSVPBy       time.Time `yaml:"rsvp_by"`
 	VenueName    string    `yaml:"venue_name"`
@@ -112,6 +113,9 @@ func Load(path string) (*Config, error) {
 	if cfg.Wedding.RSVPBy.IsZero() {
 		return nil, fmt.Errorf("wedding.rsvp_by is required in %s", path)
 	}
+	if cfg.Wedding.EventEnd.IsZero() {
+		return nil, fmt.Errorf("wedding.event_end is required in %s", path)
+	}
 
 	return &cfg, nil
 }