fix(ui): unify target-mode primary clicks

src/AcDream.App/UI/ItemInteractionController.cs

@@ -3,6 +3,14 @@ using AcDream.Core.Items;
 
 namespace AcDream.App.UI;
 
+/// <summary>Result of offering a primary click to active item-target mode.</summary>
+public enum ItemPrimaryClickResult
+{
+    NotActive,
+    ConsumedSuccess,
+    ConsumedRejected,
+}
+
 /// <summary>
 /// Shared retail item interaction orchestrator. UI widgets route item clicks,
 /// target acquisition, and drag-out drops here instead of duplicating
@@ -46,6 +54,7 @@ public sealed class ItemInteractionController : IDisposable
     };
 
     private const long RetailUseThrottleMs = 200;
+    private const long RetailDoubleClickMs = 500;
 
     private readonly ClientObjectTable _objects;
     private readonly Func<uint> _playerGuid;
@@ -66,6 +75,8 @@ public sealed class ItemInteractionController : IDisposable
     private readonly InteractionState _interactionState;
 
     private long _lastUseMs = long.MinValue / 2;
+    private uint _consumedPrimaryClickTarget;
+    private long _consumedPrimaryClickMs = long.MinValue / 2;
     private int _busyCount;
     private bool _disposed;
 
@@ -142,12 +153,41 @@ public sealed class ItemInteractionController : IDisposable
             && TargetCompatible(source, targetGuid);
     }
 
+    /// <summary>
+    /// The single target-mode interception point for world and retained item
+    /// clicks. A rejected target is still consumed and must never fall through
+    /// to selection, container opening, or ordinary item activation.
+    /// </summary>
+    public ItemPrimaryClickResult OfferPrimaryClick(uint targetGuid)
+    {
+        if (!IsTargetModeActive)
+        {
+            long now = _nowMs();
+            if (targetGuid != 0
+                && targetGuid == _consumedPrimaryClickTarget
+                && now - _consumedPrimaryClickMs <= RetailDoubleClickMs)
+                return ItemPrimaryClickResult.ConsumedRejected;
+            _consumedPrimaryClickTarget = 0;
+            return ItemPrimaryClickResult.NotActive;
+        }
+
+        bool accepted = AcquireTarget(targetGuid);
+        _consumedPrimaryClickTarget = targetGuid;
+        _consumedPrimaryClickMs = _nowMs();
+        return accepted
+            ? ItemPrimaryClickResult.ConsumedSuccess
+            : ItemPrimaryClickResult.ConsumedRejected;
+    }
+
+    public ItemPrimaryClickResult OfferSelfPrimaryClick()
+        => OfferPrimaryClick(_playerGuid());
+
     public bool ActivateItem(uint itemGuid)
     {
         if (itemGuid == 0) return false;
 
         if (IsTargetModeActive)
-            return AcquireTarget(itemGuid);
+            return OfferPrimaryClick(itemGuid) == ItemPrimaryClickResult.ConsumedSuccess;
 
         var item = _objects.Get(itemGuid);
         if (item is null) return false;
@@ -316,6 +356,7 @@ public sealed class ItemInteractionController : IDisposable
 
     private void EnterTargetMode(uint sourceGuid)
     {
+        _consumedPrimaryClickTarget = 0;
         _interactionState.EnterUseItemOnTarget(sourceGuid);
         var name = _objects.Get(sourceGuid)?.Name;
         if (!string.IsNullOrWhiteSpace(name))

src/AcDream.App/UI/Layout/InventoryController.cs

@@ -295,7 +295,8 @@ public sealed class InventoryController : IItemListDragHandler, IRetainedPanelCo
             main.DragAcceptSprite = 0x060011F7u; main.DragRejectSprite = 0x060011F8u;
             main.Clicked = () =>
             {
-                if (_itemInteraction?.AcquireSelfTarget() == true) return;
+                if (_itemInteraction?.OfferSelfPrimaryClick()
+                    is not null and not ItemPrimaryClickResult.NotActive) return;
                 OpenContainer(p);
             };
             main.DoubleClicked = () => _itemInteraction?.ActivateItem(p);
@@ -332,11 +333,26 @@ public sealed class InventoryController : IItemListDragHandler, IRetainedPanelCo
         cell.DragAcceptSprite = 0x060011F7u;                   // green insert arrow (export-confirmed)
         cell.DragRejectSprite = 0x060011F8u;                   // red circle
         cell.DoubleClicked = () => _itemInteraction?.ActivateItem(guid);
-        if (isContainer) { cell.Clicked = () => OpenContainer(guid); SetCapacityBar(cell, guid); }
-        else             cell.Clicked = () => SelectItem(guid);
+        if (isContainer)
+        {
+            cell.Clicked = () => HandlePrimaryClick(guid, () => OpenContainer(guid));
+            SetCapacityBar(cell, guid);
+        }
+        else
+        {
+            cell.Clicked = () => HandlePrimaryClick(guid, () => SelectItem(guid));
+        }
         list.AddItem(cell);
     }
 
+    private void HandlePrimaryClick(uint guid, Action fallback)
+    {
+        if (_itemInteraction?.OfferPrimaryClick(guid)
+            is not null and not ItemPrimaryClickResult.NotActive)
+            return;
+        fallback();
+    }
+
     private static void AddEmptyCell(UiItemList list)
     {
         var cell = new UiItemSlot { SpriteResolve = list.SpriteResolve, SlotIndex = list.GetNumUIItems() };

src/AcDream.App/UI/Layout/PaperdollController.cs

@@ -106,13 +106,12 @@ public sealed class PaperdollController : IItemListDragHandler, IRetainedPanelCo
             list.Cell.EmptySprite = emptySlotSprite; // visible empty-slot frame so every position is seen + usable. The live
             list.Cell.Clicked = () =>
             {
-                if (_itemInteraction?.IsTargetModeActive == true)
-                {
-                    _itemInteraction.AcquireSelfTarget();
+                uint itemId = list.Cell.ItemId;
+                if (itemId != 0 && _itemInteraction?.OfferPrimaryClick(itemId)
+                    is not null and not ItemPrimaryClickResult.NotActive)
                     return;
-                }
-                if (list.Cell.ItemId != 0)
-                    _selection.Select(list.Cell.ItemId, SelectionChangeSource.Paperdoll);
+                if (itemId != 0)
+                    _selection.Select(itemId, SelectionChangeSource.Paperdoll);
             };
             list.Cell.DoubleClicked = () =>
             {
@@ -144,7 +143,7 @@ public sealed class PaperdollController : IItemListDragHandler, IRetainedPanelCo
         // four-arrows — retail resolves target cursors off the SmartBox world
         // object only; UI hover is always pending. 2026-07-03 visual gate.)
         if (_dollViewport is UiViewport doll)
-            doll.Clicked = () => { _itemInteraction?.AcquireSelfTarget(); };
+            doll.Clicked = () => { _itemInteraction?.OfferSelfPrimaryClick(); };
 
         var slotsBtnEl = layout.FindElement(0x100005BEu);
         if (slotsBtnEl is UiButton slotsBtn)

src/AcDream.App/UI/RetailUiRuntime.cs

@@ -257,7 +257,13 @@ public sealed class RetailUiRuntime : IDisposable
         RadarController controller = RadarController.Bind(
             layout,
             _bindings.Radar.Snapshot,
-            guid => _bindings.Radar.Selection.Select(guid, SelectionChangeSource.Radar),
+            guid =>
+            {
+                if (_bindings.Toolbar.ItemInteraction.OfferPrimaryClick(guid)
+                    != ItemPrimaryClickResult.NotActive)
+                    return;
+                _bindings.Radar.Selection.Select(guid, SelectionChangeSource.Radar);
+            },
             setUiLocked: _bindings.Radar.SetUiLocked,
             datFont: _bindings.Assets.DefaultFont);
         RetailWindowFrame.Mount(Host.Root, radarRoot, _bindings.Assets.ResolveSprite,