AdminDashboardStatsResponseDto

{
    "generatedAt": "2026-02-14T08:21:20.120Z",
    "months": 6,
    "overview": {
        "users": {
            "total": 1500,
            "admins": 15,
            "registrationCompleted": 1280,
            "completionRate": 85.33,
            "newLast30Days": 54,
            "monthlyGrowthRate": 8.2
        },
        "courses": {
            "total": 42
        },
        "tests": {
            "totalTests": 28,
            "totalSubmissions": 2048,
            "averageScore": 71.2,
            "submissionsLast30Days": 176,
            "monthlyGrowthRate": 6.5
        },
        "contacts": {
            "total": 340,
            "pending": 58,
            "replied": 282,
            "replyRate": 82.94,
            "newLast30Days": 23
        },
        "materials": {
            "total": 60,
            "assignments": 812,
            "assignedUsers": 403,
            "avgAssignmentsPerUser": 2.01,
            "assignmentsLast30Days": 91
        }
    },
    "trends": [
        {
            "month": "2026-02",
            "label": "Feb 2026",
            "users": 120,
            "testSubmissions": 87,
            "contacts": 16,
            "materialAssignments": 43
        }
    ],
    "distributions": {
        "roles": [
            {
                "key": "user",
                "label": "User",
                "count": 42,
                "percentage": 66.67
            }
        ],
        "contactsByStatus": [
            {
                "key": "user",
                "label": "User",
                "count": 42,
                "percentage": 66.67
            }
        ],
        "levels": [
            {
                "key": "user",
                "label": "User",
                "count": 42,
                "percentage": 66.67,
                "averageScore": 72.5
            }
        ],
        "languages": [
            {
                "key": "en",
                "label": "EN",
                "submissions": 124,
                "averageScore": 69.2
            }
        ]
    },
    "recentActivity": {
        "contacts": [
            {
                "id": "67aeef90b2c7d32d4f6f4f11",
                "fullName": "John Doe",
                "email": "john@example.com",
                "status": "PENDING",
                "createdAt": "2026-02-14T08:21:20.120Z",
                "repliedAt": "2026-02-14T08:45:10.903Z",
                "source": "instagram"
            }
        ],
        "testResults": [
            {
                "id": "67aeef90b2c7d32d4f6f4f12",
                "userName": "John Doe",
                "userEmail": "john@example.com",
                "level": "B2",
                "totalScore": 78,
                "targetLanguage": "en",
                "testTitle": "English Placement Test",
                "completedAt": "2026-02-14T08:21:20.120Z"
            }
        ]
    }
}