feat(fnb-engine): add shopId and status filters to kitchen tickets

Add shopId and status query params to GET /api/v1/kitchen/tickets.
Joins through Session to resolve shopId since KitchenTicket only
has SessionId. Backward-compatible: without shopId falls back to
existing pending-by-station behavior.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

services/fnb-engine-net/src/FnbEngine.API/Application/Queries/GetTicketsByShopQuery.cs

@@ -0,0 +1,11 @@
+// EN: Query to get kitchen tickets by shop with optional status filter.
+// VI: Query lấy phiếu bếp theo shop với bộ lọc trạng thái tùy chọn.
+
+using MediatR;
+
+namespace FnbEngine.API.Application.Queries;
+
+public record GetTicketsByShopQuery(
+    Guid ShopId,
+    string? Status = null
+) : IRequest<IEnumerable<KitchenTicketDto>>;

services/fnb-engine-net/src/FnbEngine.API/Application/Queries/GetTicketsByShopQueryHandler.cs

@@ -0,0 +1,33 @@
+// EN: Handler for GetTicketsByShopQuery.
+// VI: Handler cho GetTicketsByShopQuery.
+
+using MediatR;
+using FnbEngine.Domain.AggregatesModel.KitchenAggregate;
+
+namespace FnbEngine.API.Application.Queries;
+
+public class GetTicketsByShopQueryHandler : IRequestHandler<GetTicketsByShopQuery, IEnumerable<KitchenTicketDto>>
+{
+    private readonly IKitchenTicketRepository _repository;
+
+    public GetTicketsByShopQueryHandler(IKitchenTicketRepository repository)
+    {
+        _repository = repository ?? throw new ArgumentNullException(nameof(repository));
+    }
+
+    public async Task<IEnumerable<KitchenTicketDto>> Handle(GetTicketsByShopQuery request, CancellationToken cancellationToken)
+    {
+        var tickets = await _repository.GetByShopAsync(request.ShopId, request.Status, cancellationToken);
+
+        return tickets.Select(t => new KitchenTicketDto(
+            t.Id,
+            t.SessionId,
+            t.OrderItemId,
+            t.ItemName,
+            t.Station,
+            t.Priority,
+            t.Status,
+            t.CreatedAt
+        ));
+    }
+}

services/fnb-engine-net/src/FnbEngine.API/Controllers/KitchenController.cs

@@ -22,16 +22,28 @@ public class KitchenController : ControllerBase
     }
 
     /// <summary>
-    /// EN: Get pending kitchen tickets.
-    /// VI: Lấy danh sách phiếu bếp chờ.
+    /// EN: Get kitchen tickets. Filter by shopId+status or by station (pending only).
+    /// VI: Lấy phiếu bếp. Lọc theo shopId+status hoặc theo station (chỉ pending).
     /// </summary>
     [HttpGet("tickets")]
     [ProducesResponseType(typeof(ApiResponse<IEnumerable<KitchenTicketDto>>), 200)]
-    public async Task<ActionResult<ApiResponse<IEnumerable<KitchenTicketDto>>>> GetPendingTickets(
+    public async Task<ActionResult<ApiResponse<IEnumerable<KitchenTicketDto>>>> GetTickets(
+        [FromQuery] Guid? shopId = null,
+        [FromQuery] string? status = null,
         [FromQuery] string? station = null,
         CancellationToken ct = default)
     {
-        var result = await _mediator.Send(new GetPendingTicketsQuery(station), ct);
+        IEnumerable<KitchenTicketDto> result;
+
+        if (shopId.HasValue && shopId.Value != Guid.Empty)
+        {
+            result = await _mediator.Send(new GetTicketsByShopQuery(shopId.Value, status), ct);
+        }
+        else
+        {
+            result = await _mediator.Send(new GetPendingTicketsQuery(station), ct);
+        }
+
         return Ok(new ApiResponse<IEnumerable<KitchenTicketDto>> { Success = true, Data = result });
     }
 

services/fnb-engine-net/src/FnbEngine.Domain/AggregatesModel/KitchenAggregate/IKitchenTicketRepository.cs

@@ -40,4 +40,10 @@ public interface IKitchenTicketRepository : IRepository<KitchenTicket>
     /// VI: Lấy danh sách phiếu theo session ID.
     /// </summary>
     Task<IEnumerable<KitchenTicket>> GetBySessionAsync(Guid sessionId, CancellationToken cancellationToken = default);
+
+    /// <summary>
+    /// EN: Get tickets by shop ID with optional status filter.
+    /// VI: Lấy danh sách phiếu theo shop ID với bộ lọc trạng thái tùy chọn.
+    /// </summary>
+    Task<IEnumerable<KitchenTicket>> GetByShopAsync(Guid shopId, string? status = null, CancellationToken cancellationToken = default);
 }

services/fnb-engine-net/src/FnbEngine.Infrastructure/Repositories/KitchenTicketRepository.cs

@@ -61,4 +61,23 @@ public class KitchenTicketRepository : IKitchenTicketRepository
             .OrderBy(kt => kt.CreatedAt)
             .ToListAsync(cancellationToken);
     }
+
+    public async Task<IEnumerable<KitchenTicket>> GetByShopAsync(Guid shopId, string? status = null, CancellationToken cancellationToken = default)
+    {
+        var sessionIds = await _context.Sessions
+            .Where(s => s.ShopId == shopId)
+            .Select(s => s.Id)
+            .ToListAsync(cancellationToken);
+
+        var query = _context.KitchenTickets
+            .Where(kt => sessionIds.Contains(kt.SessionId));
+
+        if (!string.IsNullOrWhiteSpace(status))
+            query = query.Where(kt => kt.Status == status);
+
+        return await query
+            .OrderByDescending(kt => kt.Priority)
+            .ThenBy(kt => kt.CreatedAt)
+            .ToListAsync(cancellationToken);
+    }
 }