first commit

DTOs/Customer/CreateCustomerRequest.cs

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+namespace Fitness_core_BE.DTOs.Customer
+{
+    public class CreateCustomerRequest
+    {
+        // Customer details
+        public string CusName { get; set; } = string.Empty;
+        
+        // User details
+        public string UserName { get; set; } = string.Empty;
+        public string Email { get; set; } = string.Empty;
+        public string PhoneNumber { get; set; } = string.Empty;
+        public bool IsActive { get; set; } = true;
+    }
+}

DTOs/Customer/CustomerDto.cs

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+namespace Fitness_core_BE.DTOs.Customer
+{
+    public class CustomerDto
+    {
+        public Guid CusId { get; set; }
+        public string CusName { get; set; } = string.Empty;
+        public Guid FKUserId { get; set; }
+        public string? UserName { get; set; }
+        public string? UserEmail { get; set; }
+    }
+}

DTOs/Customer/FollowedPlanDto.cs

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+namespace Fitness_core_BE.DTOs.Customer
+{
+    public record FollowedPlanDto(Guid PlanId, string? Name, bool IsFollowing, DateTime? CompletedDate);
+}

DTOs/Customer/MemberListRowDto.cs

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+using Fitness_core_BE.Models;
+
+namespace Fitness_core_BE.DTOs.Customer
+{
+    /// <summary>
+    /// One row per gym member for GET api/client/customers. Deliberate superset of
+    /// the previous CustomerSubscription row shape so the frontend change is additive:
+    /// group members each get their own row pointing at the shared subscription.
+    /// </summary>
+    public class MemberListRowDto
+    {
+        public Guid SubscriptionId { get; set; }
+        public Guid FKCustomerPlanId { get; set; }
+        public Guid FKCustomerId { get; set; }
+        public DateTime OnboardDate { get; set; }
+        public DateTime? ExpiryDate { get; set; }
+        public DateTime? RenewalDate { get; set; }
+        public bool IsActive { get; set; }
+        public DateTime CreatedAt { get; set; }
+        public Models.Customer? Customer { get; set; }
+
+        public bool IsPrimary { get; set; }
+        /// <summary>False when the member has been unassigned from their plan but is still a member of the gym.</summary>
+        public bool IsPlanAssigned { get; set; } = true;
+        public string? PlanName { get; set; }
+        public string PlanScope { get; set; } = "Individual";
+        public int MemberCount { get; set; } = 1;
+        public int MemberLimit { get; set; } = 1;
+        public decimal InvoiceAmount { get; set; }
+        public decimal PaidAmount { get; set; }
+        public decimal Balance { get; set; }
+        public string PaymentStatus { get; set; } = "Pending";
+        public bool AllowSplitPayments { get; set; }
+
+        // Linked fingerprint/device-access enrollment, if any (name may be null when the
+        // device didn't report one at enrollment time).
+        public int? FingerprintId { get; set; }
+        public string? FingerprintName { get; set; }
+        public long? AccessProfileId { get; set; }
+        public string? AccessNumber { get; set; }
+        public string AccessProvisionStatus { get; set; } = "NotConfigured";
+        public string ActualAccessState { get; set; } = "Unknown";
+        public string DesiredAccessState { get; set; } = "Enabled";
+        public int FingerprintCount { get; set; }
+        public string? AccessLastError { get; set; }
+
+        public bool IsLocked { get; set; }
+        public string? LockReason { get; set; }
+
+        /// <summary>Face-photo enrolment on the gym's access terminals.</summary>
+        public bool HasFacePhoto { get; set; }
+        /// <summary>"None" | "Pending" | "Synced" | "Failed".</summary>
+        public string FacePhotoStatus { get; set; } = "None";
+        public string? FacePhotoError { get; set; }
+    }
+}

DTOs/Customer/UpdateCustomerRequest.cs

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+namespace Fitness_core_BE.DTOs.Customer
+{
+    public class UpdateCustomerRequest
+    {
+        // Customer details
+        public string? CusName { get; set; }
+        
+        // User details
+        public string? UserName { get; set; }
+        public string? Email { get; set; }
+        public string? PhoneNumber { get; set; }
+        public bool? IsActive { get; set; }
+    }
+}