refactor(interaction): add selection interaction owner

Introduce a tested controller for selection mutations, target-mode interception, outbound ordering, Use/PickUp lifetime, and live-incarnation cleanup, plus narrow movement and WorldSession transport adapters.

src/AcDream.App/Interaction/SelectionInteractionTransport.cs

@@ -0,0 +1,62 @@
+using AcDream.Core.Net;
+using AcDream.Core.Net.Messages;
+
+namespace AcDream.App.Interaction;
+
+internal interface ISelectionInteractionTransport
+{
+    bool IsInWorld { get; }
+    bool TrySendUse(uint serverGuid, out uint sequence);
+    bool TrySendPickup(
+        uint itemGuid,
+        uint destinationContainerId,
+        int placement,
+        out uint sequence);
+}
+
+internal sealed class WorldSessionSelectionInteractionTransport(
+    Func<WorldSession?> session)
+    : ISelectionInteractionTransport
+{
+    private readonly Func<WorldSession?> _session = session
+        ?? throw new ArgumentNullException(nameof(session));
+
+    public bool IsInWorld =>
+        _session()?.CurrentState == WorldSession.State.InWorld;
+
+    public bool TrySendUse(uint serverGuid, out uint sequence)
+    {
+        WorldSession? live = _session();
+        if (live?.CurrentState != WorldSession.State.InWorld)
+        {
+            sequence = 0u;
+            return false;
+        }
+
+        sequence = live.NextGameActionSequence();
+        live.SendGameAction(InteractRequests.BuildUse(sequence, serverGuid));
+        return true;
+    }
+
+    public bool TrySendPickup(
+        uint itemGuid,
+        uint destinationContainerId,
+        int placement,
+        out uint sequence)
+    {
+        WorldSession? live = _session();
+        if (live?.CurrentState != WorldSession.State.InWorld)
+        {
+            sequence = 0u;
+            return false;
+        }
+
+        sequence = live.NextGameActionSequence();
+        live.SendGameAction(InteractRequests.BuildPickUp(
+            sequence,
+            itemGuid,
+            destinationContainerId,
+            placement));
+        return true;
+    }
+}