export interface PerformanceReview {
  id: string;
  employee_id: string;
  reviewer_id: string;
  period_start: string;
  period_end: string;
  status: string;
  overall_rating: number | null;
  strengths: string | null;
  improvements: string | null;
  goals_next: string | null;
  created_at: string;
  employee_name: string;
  reviewer_name: string;
}