first commit

DTOs/Stats/ClientStatSummaryDto.cs

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+namespace Fitness_core_BE.DTOs.Stats
+{
+    public class ClientStatSummaryDto
+    {
+        public int TotalCustomerCount { get; set; }
+        public int ThisMonthCustomerCount { get; set; }
+        public int LastMonthCustomerCount { get; set; }
+        public decimal CustomerGrowthPercentage { get; set; }
+        public decimal ThisMonthRevenue { get; set; }
+        public decimal LastMonthRevenue { get; set; }
+        public decimal RevenueGrowthPercentage { get; set; }
+        public decimal TotalRevenue { get; set; }
+        public int OverdueCount { get; set; }
+        public int ExpiringWithin7DaysCount { get; set; }
+        public int TodayPaymentsCount { get; set; }
+        public decimal TodayPaymentsTotal { get; set; }
+        // Muscle Beast-only pilot feature (their explicit request) -- gated server-side so the
+        // frontend never needs to know any gym's ClientId to decide whether to show it.
+        public bool ShowTodayPayments { get; set; }
+    }
+}

DTOs/Stats/MonthlyRevenueStat.cs

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+namespace Fitness_core_BE.DTOs.Stats
+{
+    public class MonthlyRevenueStat
+    {
+        public int Year { get; set; }
+        public int Month { get; set; }
+        public string MonthLabel { get; set; }
+        public decimal Revenue { get; set; }
+        public int NewMemberCount { get; set; }
+    }
+}