fix(interaction): close selection lifecycle review gaps

Bind queued actions and pending inventory requests to exact live incarnations, separate optimistic placement from authoritative responses, and serialize retail-style inventory ownership across UI surfaces.

Co-authored-by: OpenAI Codex <codex@openai.com>

tests/AcDream.App.Tests/UI/Layout/ToolbarControllerTests.cs

@@ -301,6 +301,97 @@ public class ToolbarControllerTests
         Assert.Equal(new[] { (item, player, 0) }, puts);
     }
 
+    [Fact]
+    public void InventoryButton_unownedGroundDropUsesDirectAttemptWithoutDestinationProjection()
+    {
+        const uint player = 0x5000u;
+        const uint item = 0x70005001u;
+        var (layout, _, _) = FakeToolbar();
+        var repo = new ClientObjectTable();
+        repo.AddOrUpdate(new ClientObject { ObjectId = item, Name = "Loot", Type = ItemType.Misc });
+        var placements = new List<(uint Item, uint Container, int Placement)>();
+        var directPuts = new List<(uint Item, uint Container, int Placement)>();
+        using var interaction = new ItemInteractionController(
+            repo,
+            playerGuid: () => player,
+            sendUse: null,
+            sendUseWithTarget: null,
+            sendWield: null,
+            sendDrop: null,
+            placeInBackpack: (i, c, p) => placements.Add((i, c, p)));
+        ToolbarController.Bind(
+            layout,
+            repo,
+            () => Array.Empty<ShortcutEntry>(),
+            iconIds: static (_, _, _, _, _) => 0u,
+            useItem: static _ => { },
+            itemInteraction: interaction,
+            playerGuid: () => player,
+            sendPutItemInContainer: (i, c, p) => directPuts.Add((i, c, p)));
+        var button = (UiButton)layout.FindElement(InventoryButtonId)!;
+        var payload = new ItemDragPayload(item, ItemDragSource.Ground, 0, new UiItemSlot());
+
+        Assert.True(button.OnEvent(new UiEvent(0u, button, UiEventType.DragEnter, Payload: payload)));
+        Assert.True(button.OnEvent(new UiEvent(0u, button, UiEventType.DropReleased, Payload: payload)));
+
+        Assert.Empty(placements);
+        Assert.Equal(new[] { (item, player, 0) }, directPuts);
+        Assert.False(interaction.TryGetPendingBackpackPlacement(item, out _));
+        Assert.True(interaction.TryGetPendingInventoryRequest(out var request));
+        Assert.Equal(item, request.ItemId);
+    }
+
+    [Fact]
+    public void InventoryButton_ownedDropPublishesDestinationAndGloballyRejectsSecondRequest()
+    {
+        const uint player = 0x5000u;
+        const uint first = 0x70005002u;
+        const uint second = 0x70005003u;
+        var (layout, _, _) = FakeToolbar();
+        var repo = new ClientObjectTable();
+        const uint pack = 0x5004u;
+        repo.AddOrUpdate(new ClientObject { ObjectId = player, Name = "Player", Type = ItemType.Creature });
+        repo.AddOrUpdate(new ClientObject { ObjectId = pack, Name = "Pack", Type = ItemType.Container });
+        repo.MoveItem(pack, player, 0);
+        repo.AddOrUpdate(new ClientObject { ObjectId = first, Name = "First Loot", Type = ItemType.Misc });
+        repo.AddOrUpdate(new ClientObject { ObjectId = second, Name = "Second Loot", Type = ItemType.Misc });
+        repo.MoveItem(first, pack, 0);
+        repo.MoveItem(second, pack, 1);
+        var puts = new List<(uint Item, uint Container, int Placement)>();
+        var messages = new List<string>();
+        using var interaction = new ItemInteractionController(
+            repo,
+            playerGuid: () => player,
+            sendUse: null,
+            sendUseWithTarget: null,
+            sendWield: null,
+            sendDrop: null,
+            systemMessage: messages.Add);
+        ToolbarController.Bind(
+            layout,
+            repo,
+            () => Array.Empty<ShortcutEntry>(),
+            iconIds: static (_, _, _, _, _) => 0u,
+            useItem: static _ => { },
+            itemInteraction: interaction,
+            playerGuid: () => player,
+            sendPutItemInContainer: (i, c, p) => puts.Add((i, c, p)));
+        var button = (UiButton)layout.FindElement(InventoryButtonId)!;
+
+        foreach (uint item in new[] { first, second })
+        {
+            var payload = new ItemDragPayload(item, ItemDragSource.Inventory, 0, new UiItemSlot());
+            button.OnEvent(new UiEvent(0u, button, UiEventType.DragEnter, Payload: payload));
+            button.OnEvent(new UiEvent(0u, button, UiEventType.DropReleased, Payload: payload));
+        }
+
+        Assert.Equal(new[] { (first, player, 0) }, puts);
+        Assert.True(interaction.TryGetPendingBackpackPlacement(first, out _));
+        Assert.True(interaction.TryGetPendingInventoryRequest(out var request));
+        Assert.Equal(first, request.ItemId);
+        Assert.Equal(new[] { ItemInteractionController.InventoryRequestBusyMessage }, messages);
+    }
+
     [Fact]
     public void InventoryButton_shortcutAliasDrop_staysNeutralAndDoesNotMovePhysicalItem()
     {