Fix uplink item spawning.

Actually spawns for the person who USES the uplink, not who owns it. Can't believe that was an actual bug.

Also puts it in your active hand if possible.

Content.Server/Interfaces/PDA/IPDAUplinkManager.cs

@@ -1,11 +1,15 @@
+#nullable enable
 using System.Collections.Generic;
+using System.Diagnostics.CodeAnalysis;
 using Content.Shared.GameObjects.Components.PDA;
+using Robust.Shared.Interfaces.GameObjects;
+using Robust.Shared.Map;
 
 namespace Content.Server.Interfaces.PDA
 {
     public interface IPDAUplinkManager
     {
-        public IReadOnlyDictionary<string, UplinkListingData> FetchListings => null;
+        public IReadOnlyDictionary<string, UplinkListingData> FetchListings { get; }
 
         void Initialize();
 
@@ -13,7 +17,11 @@ namespace Content.Server.Interfaces.PDA
 
         public bool ChangeBalance(UplinkAccount acc, int amt);
 
-        public bool TryPurchaseItem(UplinkAccount acc, string itemId);
+        public bool TryPurchaseItem(
+            UplinkAccount? acc,
+            string itemId,
+            EntityCoordinates spawnCoords,
+            [NotNullWhen(true)] out IEntity? purchasedItem);
 
     }
 }