export interface Filament {
  id?: string;
  tip: string;
  finish: string;
  boja: string;
  boja_hex?: string;  // Using snake_case to match database
  refill: number;     // Changed to number for consistency
  spulna: number;     // Changed to number for consistency
  kolicina: number;   // Already changed to match database
  cena: string;
  status?: string;
  created_at?: string;  // Using snake_case to match database
  updated_at?: string;  // Using snake_case to match database
  sale_percentage?: number;
  sale_active?: boolean;
  sale_start_date?: string;
  sale_end_date?: string;
}