Interface CourseAnalyticsSummary

interface CourseAnalyticsSummary {
    courseId: string;
    keyMetrics: {
        activeStudents: number;
        averageProgress: number;
        averageTimeSpent: string;
        certificatesIssued: number;
        completionRate: number;
        totalEnrollments: number;
    };
    period: { from: string; to: string };
    trends: {
        completionTrend: string;
        engagementTrend: string;
        enrollmentGrowth: string;
    };
}