export interface Campaign {
    id: string;
    name: string;
    title: string;
    body: string;
    image_url?: string | null;
    status: string;
    created_at: string;
    scheduled_at?: string | null;
    target_criteria: any;
    updated_at: string;
    additional_data: any;
    sent_count: number;
    total_count: number;
    impression_count: number;
    click_count: number;
    open_count: number;
    published_by?: string | null;
}