feat: Enhance booking functionality with invoice management and dashboard summary

- Added customerId to guest booking requests for better identification.
- Implemented new endpoints for managing booking invoices and dashboard summaries.
- Created BookingInvoice and BookingDashboardSummary DTOs to support new features.
- Updated Booking and BookingInvoice models to include payment method and timestamps.
- Enhanced BookingService to handle invoice creation upon payment confirmation.
- Modified BookingRepository to support CRUD operations for BookingInvoice.
- Updated TenantDbContext to include BookingInvoice DbSet and relevant configurations.
- Improved error handling and validation for booking completion and payment processes.

Interfaces/Services/IBookingService.cs

@@ -43,8 +43,10 @@ namespace Fitness_core_BE.Interfaces.Services
         /// <summary>Staff manually flags a Confirmed, never-arrived booking.</summary>
         Task<object> MarkNoShow(object payload, HttpContext httpContext);
 
-        /// <summary>Staff manually ends a CheckedIn booking early (before the lazy sweep would
-        /// catch it), releasing its RFID tag if any.</summary>
+        /// <summary>Staff checks out a CheckedIn booking, releasing its RFID tag if any. A guest
+        /// booking still Unpaid must confirm payment in this same call -- see
+        /// BookingService.CompleteBooking. Also lazily sweeps this client's overdue Confirmed
+        /// bookings to NoShow first, same as CheckInBooking.</summary>
         Task<object> CompleteBooking(object payload, HttpContext httpContext);
 
         Task<object> GetMyBookings(object payload, HttpContext httpContext);
@@ -52,5 +54,16 @@ namespace Fitness_core_BE.Interfaces.Services
 
         /// <summary>Unified roster covering both booking modes.</summary>
         Task<object> GetBookings(object payload, HttpContext httpContext);
+
+        /// <summary>Receipts generated whenever a booking's payment is recorded -- their own
+        /// "Invoices" tab, separate from the membership-based Customer Payments view.</summary>
+        Task<object> GetBookingInvoices(object payload, HttpContext httpContext);
+
+        /// <summary>Renders the public, unauthenticated receipt page a BookingInvoice's ShareUrl
+        /// points to. Returns null if not found.</summary>
+        Task<object?> GetBookingInvoiceView(object payload);
+
+        /// <summary>Stat-card summary for the Bookings page's Dashboard tab.</summary>
+        Task<object> GetBookingDashboardSummary(object payload, HttpContext httpContext);
     }
 }