Added shared projects

LiteCharms.Features/Customers/Queries/GetCustomerOrdersQuery.cs

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+using LiteCharms.Models;
+
+namespace LiteCharms.Features.Customers.Queries;
+
+public class GetCustomerOrdersQuery : IRequest<Result<Order[]>>
+{
+    public Guid CustomerId { get; }
+
+    private GetCustomerOrdersQuery(Guid customerId) => CustomerId = customerId;
+
+    public static GetCustomerOrdersQuery Create(Guid customerId)
+    {
+        if (customerId == Guid.Empty)
+            throw new ArgumentException("CustomerId is required.", nameof(customerId));
+
+        return new(customerId);
+    }
+}

LiteCharms.Features/Customers/Queries/GetCustomerRefundsQuery.cs

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+using LiteCharms.Models;
+
+namespace LiteCharms.Features.Customers.Queries;
+
+public class GetCustomerRefundsQuery : IRequest<Result<OrderRefund[]>>
+{
+    public Guid CustomerId { get; set; }
+
+    private GetCustomerRefundsQuery(Guid customerId) => CustomerId = customerId;
+
+    public static GetCustomerRefundsQuery Create(Guid customerId)
+    {
+        if (customerId == Guid.Empty)
+            throw new ArgumentException("CustomerId is required.", nameof(customerId));
+
+        return new(customerId);
+    }
+}

LiteCharms.Features/Customers/Queries/GetCustomersQuery.cs

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+using LiteCharms.Models;
+
+namespace LiteCharms.Features.Customers.Queries;
+
+public class GetCustomersQuery : IRequest<Result<Customer[]>>
+{
+    public DateOnly From { get; set; }
+
+    public DateOnly To { get; set; }
+
+    private GetCustomersQuery(DateOnly from, DateOnly to)
+    {
+        From = from;
+        To = to;
+    }
+
+    public static GetCustomersQuery Create(DateOnly from, DateOnly to)
+    {
+        if (from > to)
+            throw new ArgumentException("From date cannot be greater than To date.");
+
+        return new(from, to);
+    }
+}

LiteCharms.Features/Customers/Queries/Handlers/GetCustomerOrdersQueryHandler.cs

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+using LiteCharms.Extensions;
+using LiteCharms.Infrastructure.Database;
+using LiteCharms.Models;
+
+namespace LiteCharms.Features.Customers.Queries.Handlers;
+
+public class GetCustomerOrdersQueryHandler(IDbContextFactory<LeadGeneratorDbContext> contextFactory) : IRequestHandler<GetCustomerOrdersQuery, Result<Order[]>>
+{
+    public async ValueTask<Result<Order[]>> Handle(GetCustomerOrdersQuery request, CancellationToken cancellationToken)
+    {
+		try
+		{
+            using var context = await contextFactory.CreateDbContextAsync(cancellationToken);
+
+            var orders = await context.Orders.AsNoTracking()
+                .OrderByDescending(o => o.CreatedAt)
+                .Where(o => o.CustomerId == request.CustomerId)
+                .ToArrayAsync(cancellationToken);
+
+            return orders?.Length > 0
+                ? Result.Ok(orders.Select(o => o.ToModel()).ToArray())
+                : Result.Fail<Order[]>(new Error($"No orders found for customer with Id {request.CustomerId}."));
+        }
+		catch (Exception ex)
+		{
+            return Result.Fail<Order[]>(new Error(ex.Message).CausedBy(ex));
+        }
+    }
+}

LiteCharms.Features/Customers/Queries/Handlers/GetCustomerRefundsQueryHandler.cs

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+using LiteCharms.Extensions;
+using LiteCharms.Infrastructure.Database;
+using LiteCharms.Models;
+
+namespace LiteCharms.Features.Customers.Queries.Handlers;
+
+public class GetCustomerRefundsQueryHandler(IDbContextFactory<LeadGeneratorDbContext> contextFactory) : IRequestHandler<GetCustomerRefundsQuery, Result<OrderRefund[]>>
+{
+    public async ValueTask<Result<OrderRefund[]>> Handle(GetCustomerRefundsQuery request, CancellationToken cancellationToken)
+    {
+		try
+		{
+            using var context = await contextFactory.CreateDbContextAsync(cancellationToken);
+
+            if(!await context.Customers.AnyAsync(c => c.Id == request.CustomerId, cancellationToken))
+                return Result.Fail<OrderRefund[]>(new Error($"Customer with Id {request.CustomerId} does not exist."));
+
+            var refunds = await context.OrderRefunds.AsNoTracking().AsSplitQuery()
+                .OrderByDescending(o => o.CreatedAt)
+                .Where(r => r.Order!.CustomerId == request.CustomerId).ToArrayAsync(cancellationToken);
+
+            return refunds?.Length > 0 
+                ? Result.Ok(refunds.Select(r => r.ToModel()).ToArray()) 
+                : Result.Fail<OrderRefund[]>(new Error($"No refunds found for customer with Id {request.CustomerId}."));
+        }
+		catch (Exception ex)
+		{
+            return Result.Fail<OrderRefund[]>(new Error(ex.Message).CausedBy(ex));
+        }
+    }
+}

LiteCharms.Features/Customers/Queries/Handlers/GetCustomersQueryHandler.cs

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+using LiteCharms.Extensions;
+using LiteCharms.Infrastructure.Database;
+using LiteCharms.Models;
+
+namespace LiteCharms.Features.Customers.Queries.Handlers;
+
+public class GetCustomersQueryHandler(IDbContextFactory<LeadGeneratorDbContext> contextFactory) : IRequestHandler<GetCustomersQuery, Result<Customer[]>>
+{
+    public async ValueTask<Result<Customer[]>> Handle(GetCustomersQuery request, CancellationToken cancellationToken)
+    {
+		try
+		{
+            var fromDate = request.From.ToDateTime(TimeOnly.MinValue);
+            var toDate = request.To.ToDateTime(TimeOnly.MaxValue);
+
+            using var context = await contextFactory.CreateDbContextAsync(cancellationToken);
+
+            var customers = await context.Customers.AsNoTracking()
+                .OrderByDescending(o => o.CreatedAt)
+                .Where(c => c.CreatedAt >= fromDate && c.CreatedAt <= toDate)
+                .ToArrayAsync(cancellationToken);
+
+            return customers?.Length > 0
+                ? Result.Ok(customers.Select(c => c.ToModel()).ToArray())
+                : Result.Fail<Customer[]>(new Error("No customers found in the specified date range."));
+        }
+		catch (Exception ex)
+		{
+            return Result.Fail<Customer[]>(new Error(ex.Message).CausedBy(ex));
+        }
+    }
+}