refactor(interaction): cut GameWindow over to controller

Route selection input, frame-ordered dispatch, movement completion, hidden/delete cleanup, and session reset through SelectionInteractionController. Keep ItemInteractionController backend-independent by constructing it outside the retained-UI gate.

src/AcDream.App/Rendering/GameWindow.cs

@@ -45,6 +45,7 @@ public sealed class GameWindow : IDisposable
     private AcDream.App.Rendering.Wb.WbDrawDispatcher? _wbDrawDispatcher;
     private AcDream.App.Rendering.Selection.RetailSelectionScene? _retailSelectionScene;
     private AcDream.App.Interaction.WorldSelectionQuery? _worldSelectionQuery;
+    private AcDream.App.Interaction.SelectionInteractionController? _selectionInteractions;
     /// <summary>Phase N.5: ARB_bindless_texture + ARB_shader_draw_parameters
     /// support. Required at startup — missing bindless throws
     /// <see cref="NotSupportedException"/> in <c>OnLoad</c>.</summary>
@@ -183,7 +184,6 @@ public sealed class GameWindow : IDisposable
     private readonly LiveEntityAnimationScheduler _liveAnimationScheduler;
     private readonly AcDream.App.Input.LocalPlayerProjectionController _localPlayerProjection;
     private readonly AcDream.App.Input.LocalPlayerOutboundController _localPlayerOutbound;
-    private readonly AcDream.App.Input.OutboundInteractionQueue _outboundInteractions = new();
     private readonly AcDream.App.Input.RetailLocalPlayerFrameController _localPlayerFrame;
     private readonly AcDream.App.World.RetailLiveFrameCoordinator _liveFrameCoordinator;
     private AcDream.App.Physics.RemoteTeleportController? _remoteTeleportController;
@@ -1162,20 +1162,6 @@ public sealed class GameWindow : IDisposable
     /// </summary>
     private IReadOnlyDictionary<uint, AcDream.Core.Net.WorldSession.EntitySpawn> LastSpawns =>
         _liveEntities?.Snapshots ?? EmptyLiveSpawnMap;
-    // B.6/B.7 (2026-05-16): pending close-range action that will be fired
-    // once the local auto-walk overlay reports arrival (body has finished
-    // rotating to face the target). Only set for close-range Use/PickUp;
-    // far-range sends fire the wire packet immediately at SendUse/SendPickUp
-    // time. Cleared before the deferred send fires — single-fire, no retry.
-    private PendingPostArrivalAction? _pendingPostArrivalAction;
-
-    private readonly record struct PendingPostArrivalAction(
-        uint Guid,
-        uint LocalEntityId,
-        bool IsPickup,
-        uint DestinationContainerId = 0u,
-        int Placement = 0);
-
     // R5-V2: the local player's CPhysicsObj stand-in — owns the player's
     // TargetManager voyeur system, registered in _physicsHosts so remote
     // entities chasing the player resolve it. Replaces the AP-79
@@ -2114,12 +2100,6 @@ public sealed class GameWindow : IDisposable
             Objects,
             guid => _liveSession?.SendNoLongerViewingContents(guid));
 
-        // Phase D.2b retail-look retained UI (ACDREAM_RETAIL_UI=1).
-        if (_options.RetailUi)
-        {
-            _vitalsVm ??= new AcDream.UI.Abstractions.Panels.Vitals.VitalsVM(Combat, LocalPlayer);
-            _uiHost = new AcDream.App.UI.UiHost(_gl, shadersDir, _debugFont);
-            _uiHost.Root.UiLocked = _persistedGameplay.LockUI;
         AcDream.App.Spells.MagicCatalog magicCatalog = _magicCatalog!;
         _itemInteractionController = new AcDream.App.UI.ItemInteractionController(
             Objects,
@@ -2171,6 +2151,13 @@ public sealed class GameWindow : IDisposable
                 _liveSession?.SendStackableSplitToContainer(
                     item, container, placement, amount),
             requestExternalContainer: guid => _externalContainers.RequestOpen(guid));
+
+        // Phase D.2b retail-look retained UI (ACDREAM_RETAIL_UI=1).
+        if (_options.RetailUi)
+        {
+            _vitalsVm ??= new AcDream.UI.Abstractions.Panels.Vitals.VitalsVM(Combat, LocalPlayer);
+            _uiHost = new AcDream.App.UI.UiHost(_gl, shadersDir, _debugFont);
+            _uiHost.Root.UiLocked = _persistedGameplay.LockUI;
             var cursorFeedbackController = new AcDream.App.UI.CursorFeedbackController(
                 _itemInteractionController,
                 // Retail UpdateCursorState (0x00564630) keys target-mode
@@ -2780,6 +2767,18 @@ public sealed class GameWindow : IDisposable
                         return (sphere.Origin, sphere.Radius);
                     }
                 });
+            if (_itemInteractionController is { } itemInteractions)
+            {
+                _selectionInteractions ??= new AcDream.App.Interaction.SelectionInteractionController(
+                    _selection,
+                    _worldSelectionQuery,
+                    itemInteractions,
+                    new AcDream.App.Interaction.WorldSessionSelectionInteractionTransport(
+                        () => _liveSession),
+                    new AcDream.App.Interaction.PlayerInteractionMovementSink(
+                        () => _playerController),
+                    text => _debugVm?.AddToast(text));
+            }
             // A.5 T22.5: apply A2C gate from quality preset.
             _wbDrawDispatcher.AlphaToCoverage = _resolvedQuality.AlphaToCoverage;
 
@@ -3020,10 +3019,13 @@ public sealed class GameWindow : IDisposable
         Objects.Clear();
         SpellBook.Clear();
         _magicRuntime?.Reset();
+        if (_selectionInteractions is { } interactions)
+            interactions.ResetSession();
+        else
+        {
             _itemInteractionController?.ResetSession();
             _selection.Reset();
-        _outboundInteractions.Clear();
+        }
-        _pendingPostArrivalAction = null;
         _retailSelectionScene?.Reset();
         _particleVisibility.Reset();
         try
@@ -5493,16 +5495,12 @@ public sealed class GameWindow : IDisposable
 
     private void ClearTargetForHiddenEntity(uint serverGuid)
     {
-        if (_pendingPostArrivalAction is { Guid: var pendingGuid }
+        if (_selectionInteractions is { } interactions)
-            && pendingGuid == serverGuid)
+            interactions.OnEntityHidden(serverGuid);
-            _pendingPostArrivalAction = null;
+        else if (_selection.SelectedObjectId == serverGuid)
-
-        if (_selection.SelectedObjectId == serverGuid)
-        {
             _selection.Clear(
                 AcDream.Core.Selection.SelectionChangeSource.System,
                 AcDream.Core.Selection.SelectionChangeReason.Cleared);
-        }
 
         if (_physicsHosts.TryGetValue(serverGuid, out var hiddenHost)
             && hiddenHost is EntityPhysicsHost hiddenEntityHost)
@@ -5531,11 +5529,18 @@ public sealed class GameWindow : IDisposable
             () => _remoteTeleportController?.Forget(record),
             () =>
             {
-                if (_pendingPostArrivalAction is { Guid: var pendingGuid }
+                bool replacementExists =
-                    && pendingGuid == serverGuid
+                    _liveEntities?.TryGetRecord(serverGuid, out LiveEntityRecord current) == true
-                    && _pendingPostArrivalAction.Value.LocalEntityId == record.LocalEntityId)
+                    && !ReferenceEquals(current, record);
+                if (_selectionInteractions is { } interactions)
                 {
-                    _pendingPostArrivalAction = null;
+                    interactions.OnEntityRemoved(record, replacementExists);
+                }
+                else if (!replacementExists && _selection.SelectedObjectId == serverGuid)
+                {
+                    _selection.Clear(
+                        AcDream.Core.Selection.SelectionChangeSource.System,
+                        AcDream.Core.Selection.SelectionChangeReason.SelectedObjectRemoved);
                 }
             },
         };
@@ -5599,16 +5604,6 @@ public sealed class GameWindow : IDisposable
         // incarnation.
         cleanups.Add(() => incarnation.RunIfNoReplacement(
             () => _remoteLastMove.Remove(serverGuid)));
-        cleanups.Add(() => incarnation.RunIfNoReplacement(() =>
-        {
-            if (_selection.SelectedObjectId == serverGuid)
-            {
-                _selection.Clear(
-                    AcDream.Core.Selection.SelectionChangeSource.System,
-                    AcDream.Core.Selection.SelectionChangeReason.SelectedObjectRemoved);
-            }
-        }));
-
         cleanups.Add(() => _translucencyFades.ClearEntity(existingEntity.Id)); // #188
         cleanups.Add(() => LeaveWorldLiveEntityRuntimeComponents(record));
         // Logical teardown ends the retained shadow payload too. The weaker
@@ -5948,7 +5943,7 @@ public sealed class GameWindow : IDisposable
 
         // Per-Door UM dispatch trail; grep [door-cycle] in launch.log to verify door animation.
         if (AcDream.Core.Physics.PhysicsDiagnostics.ProbeBuildingEnabled
-            && IsDoorName(LiveName(update.Guid)))
+            && IsDoorName(Objects.Get(update.Guid)?.Name))
         {
             Console.WriteLine(System.FormattableString.Invariant(
                 $"[door-cycle] guid=0x{update.Guid:X8} stance=0x{stance:X4} cmd=0x{(command ?? 0u):X4}"));
@@ -11495,7 +11490,7 @@ public sealed class GameWindow : IDisposable
         // active server MoveTo chain when it receives MoveToState, so sending
         // Use directly from Silk's key callback inverted that order and left
         // the client walking to a corpse whose server callback was cancelled.
-        _outboundInteractions.Drain();
+        _selectionInteractions?.DrainOutbound();
         _scriptRunner?.PublishTime(_physicsScriptGameTime);
         System.Numerics.Vector3? playerPosition =
             _entitiesByServerGuid.TryGetValue(
@@ -13503,6 +13498,9 @@ public sealed class GameWindow : IDisposable
         if (_retailUiRuntime?.HandleInputAction(action) == true)
             return;
 
+        if (_selectionInteractions?.HandleInputAction(action) == true)
+            return;
+
         // K-fix1 (2026-04-26): Q is autorun TOGGLE, not hold-to-run. Press
         // Q to start, press Q again to stop. Pressing Backup / Stop /
         // StrafeLeft / StrafeRight while autorun is active also cancels it
@@ -13599,38 +13597,10 @@ public sealed class GameWindow : IDisposable
                     _settingsPanel.IsVisible = !_settingsPanel.IsVisible;
                 break;
 
-            case AcDream.UI.Abstractions.Input.InputAction.SelectionClosestMonster:
-                SelectClosestCombatTarget(showToast: true);
-                break;
-
-            case AcDream.UI.Abstractions.Input.InputAction.SelectionPreviousSelection:
-                _selection.SelectPrevious();
-                break;
-
             case AcDream.UI.Abstractions.Input.InputAction.CombatToggleCombat:
                 ToggleLiveCombatMode();
                 break;
 
-            case AcDream.UI.Abstractions.Input.InputAction.SelectLeft:
-                PickAndStoreSelection(useImmediately: false);
-                break;
-
-            case AcDream.UI.Abstractions.Input.InputAction.SelectDblLeft:
-                PickAndStoreSelection(useImmediately: true);
-                break;
-
-            case AcDream.UI.Abstractions.Input.InputAction.UseSelected:
-                UseCurrentSelection();
-                break;
-
-            case AcDream.UI.Abstractions.Input.InputAction.SelectionPickUp:
-                if (_selection.SelectedObjectId is uint pickupTarget)
-                    _outboundInteractions.Enqueue(() =>
-                        _itemInteractionController?.PlaceWorldItemInBackpack(pickupTarget));
-                else
-                    _debugVm?.AddToast("Nothing selected");
-                break;
-
             case AcDream.UI.Abstractions.Input.InputAction.EscapeKey:
                 if (_itemInteractionController?.IsAnyTargetModeActive == true)
                     _itemInteractionController.CancelTargetMode();
@@ -13757,15 +13727,8 @@ public sealed class GameWindow : IDisposable
             result);
 
     private uint? GetSelectedOrClosestCombatTarget()
-    {
+        => _selectionInteractions?.GetSelectedOrClosestCombatTarget(
-        if (_selection.SelectedObjectId is { } selected && IsLiveHostileMonsterTarget(selected))
+            _persistedGameplay.AutoTarget);
-            return selected;
-
-        if (!_persistedGameplay.AutoTarget)
-            return null;
-
-        return SelectClosestCombatTarget(showToast: false);
-    }
 
     /// <summary>
     /// Resolves retail's combat-camera target. ClientCombatSystem::
@@ -13798,450 +13761,44 @@ public sealed class GameWindow : IDisposable
     /// pick the local player while plain selection excludes it.
     /// </summary>
     private uint? PickWorldGuidAtCursor(bool includeSelf)
-        => _worldSelectionQuery?.PickAtCursor(includeSelf);
+        => _selectionInteractions?.PickAtCursor(includeSelf)
+            ?? _worldSelectionQuery?.PickAtCursor(includeSelf);
 
     private uint? PickWorldGuidAt(float mouseX, float mouseY, bool includeSelf)
-        => _worldSelectionQuery?.PickAt(mouseX, mouseY, includeSelf);
+        => _selectionInteractions?.PickAt(mouseX, mouseY, includeSelf)
+            ?? _worldSelectionQuery?.PickAt(mouseX, mouseY, includeSelf);
 
     private void BeginSelectionLightingPulse(uint serverGuid)
         => _worldSelectionQuery?.BeginLightingPulse(serverGuid);
 
-    private void PickAndStoreSelection(bool useImmediately)
+    // Contained/toolbar activation is not a world-selection interaction: it
-    {
+    // sends directly without speculative TurnToObject/MoveToObject.
-        if (_cameraController is null || _window is null) return;
-
-        // Target-use mode picks WITH self (retail: kit-heal yourself by
-        // clicking your own toon); plain selection keeps the self-exclusion.
-        var picked = PickWorldGuidAtCursor(
-            includeSelf: _itemInteractionController?.IsAnyTargetModeActive == true);
-
-        if (picked is uint guid)
-        {
-            // Retail UIElement_SmartBoxWrapper::RecvNotice_SmartBoxObjectFound
-            // @ 0x004E5AD0 pulses every successfully found click before it
-            // branches into select/use/targeted-use behavior.
-            BeginSelectionLightingPulse(guid);
-
-            if (_itemInteractionController?.OfferPrimaryClick(guid)
-                is not null and not AcDream.App.UI.ItemPrimaryClickResult.NotActive)
-                return;
-
-            _selection.Select(guid, AcDream.Core.Selection.SelectionChangeSource.World);
-            string label = DescribeLiveEntity(guid);
-            Console.WriteLine($"[B.4b] pick guid=0x{guid:X8} name={label}");
-            // B.7 (2026-05-15): one-shot per-pick diagnostic so we can
-            // see exactly which ItemType + PWD bitfield bits + resolved
-            // RadarBlipColor are produced for the just-picked entity.
-            // Helps verify whether a "green NPC" really is flagged as
-            // Vendor server-side or whether our lookup is wrong.
-            uint rawItemType = (uint)LiveItemType(guid);
-            uint pwdBits = 0;
-            uint? pickUseability = null;
-            float? pickUseRadius = null;
-            float pickScale = 1f;
-            uint? pickSetupId = null;
-            if (LastSpawns.TryGetValue(guid, out var spawn))
-            {
-                if (spawn.ObjectDescriptionFlags is { } odf) pwdBits = odf;
-                pickUseability = spawn.Useability;
-                pickUseRadius  = spawn.UseRadius;
-                pickScale      = spawn.ObjScale ?? 1f;
-                pickSetupId    = spawn.SetupTableId;
-            }
-            var col = AcDream.Core.Ui.RadarBlipColors.For(rawItemType, pwdBits);
-            string useStr   = pickUseability.HasValue ? $"0x{pickUseability.Value:X4}" : "null";
-            string radStr   = pickUseRadius.HasValue  ? pickUseRadius.Value.ToString("F2", System.Globalization.CultureInfo.InvariantCulture) : "null";
-            string setupStr = pickSetupId.HasValue    ? $"0x{pickSetupId.Value:X8}"    : "null";
-            Console.WriteLine(System.FormattableString.Invariant(
-                $"[B.7] pick-info guid=0x{guid:X8} itemType=0x{rawItemType:X8} pwd=0x{pwdBits:X8} use={useStr} useRadius={radStr} scale={pickScale:F2} setup={setupStr} color=({col.R},{col.G},{col.B})"));
-            _debugVm?.AddToast($"Selected: {label}");
-            if (useImmediately)
-            {
-                // Route world double-click through the same retail
-                // ItemHolder policy as keyboard Use. This both establishes
-                // ClientUISystem::groundObject for containers and preserves
-                // movement-release-before-Use wire ordering.
-                _outboundInteractions.Enqueue(() =>
-                    _itemInteractionController?.ActivateItem(guid));
-            }
-        }
-        else
-        {
-            if (_itemInteractionController?.IsAnyTargetModeActive == true)
-                return;
-            _debugVm?.AddToast("Nothing to select");
-        }
-    }
-
-    private void UseCurrentSelection()
-    {
-        if (_selection.SelectedObjectId is not uint sel)
-        {
-            _debugVm?.AddToast("Nothing selected");
-            return;
-        }
-
-        // Retail sends keyboard Use through ItemHolder::UseObject @ 0x00588A80,
-        // the same policy owner used by the toolbar. Keeping a second classifier here
-        // made BF_CORPSE containers look pickupable and sent PutItemInContainer,
-        // which ACE correctly rejected as Stuck (0x0029).
-        uint selected = sel;
-        _outboundInteractions.Enqueue(() =>
-            _itemInteractionController?.UseSelectedOrEnterMode(selected));
-    }
-
-    private void SendUse(uint guid)
-    {
-        if (_liveSession is null
-            || _liveSession.CurrentState != AcDream.Core.Net.WorldSession.State.InWorld)
-        {
-            _debugVm?.AddToast("Not in world");
-            return;
-        }
-
-        // Retail-faithful useability gate (acclient_2013_pseudo_c.txt:256455
-        // ItemUses::IsUseable). Signs / banners with useability=0 silently
-        // ignore Use.
-        if (!IsUseableTarget(guid))
-        {
-            if (AcDream.Core.Physics.PhysicsDiagnostics.ProbeAutoWalkEnabled)
-                Console.WriteLine($"[B.4b] SendUse ignored — not useable guid=0x{guid:X8}");
-            return;
-        }
-
-        // B.6/R4-V5: install a speculative local TurnToObject/MoveToObject
-        // through the player's MoveToManager so close-range Use rotates the
-        // body to face before the action fires. For FAR targets, ACE's
-        // CreateMoveToChain (Player_Move.cs:37-179) takes over via inbound
-        // MovementType=6, whose PerformMovement re-targets with ACE's
-        // wire-supplied radius.
-        //
-        // Close-range deferral fires the wire packet ONCE on
-        // MoveToComplete(None) (turn-first done), not a retry of an
-        // earlier failed send. No re-send path.
-        if (_worldSelectionQuery?.TryGetInteractionTarget(
-                guid,
-                out AcDream.App.Interaction.WorldInteractionTarget useTarget) != true)
-        {
-            return;
-        }
-
-        bool closeRange = IsCloseRangeTarget(guid);
-        InstallSpeculativeTurnToTarget(guid);
-
-        if (closeRange)
-        {
-            // Defer the wire packet — OnAutoWalkArrivedSendDeferredAction
-            // will fire it after rotation completes.
-            _pendingPostArrivalAction = new PendingPostArrivalAction(
-                guid,
-                useTarget.LocalEntityId,
-                IsPickup: false);
-            if (AcDream.Core.Physics.PhysicsDiagnostics.ProbeAutoWalkEnabled)
-                Console.WriteLine($"[B.4b] use deferred (close-range, turn-first) guid=0x{guid:X8}");
-            return;
-        }
-
-        // Far range: send Use ONCE. ACE's CreateMoveToChain
-        // (Player_Use.cs:205) holds a callback (TryUseItem) and fires
-        // it server-side when WithinUseRadius passes during the
-        // MoveToChain poll (Player_Move.cs:150). No client-side retry
-        // needed — the Phase B.6 MoveToState-suppression fix
-        // (GameWindow.cs:6410) keeps ACE's chain alive during the
-        // walk.
-        var seq  = _liveSession.NextGameActionSequence();
-        var body = AcDream.Core.Net.Messages.InteractRequests.BuildUse(seq, guid);
-        _liveSession.SendGameAction(body);
-        Console.WriteLine($"[B.4b] use guid=0x{guid:X8} seq={seq}");
-        if (AcDream.Core.Physics.PhysicsDiagnostics.ProbeAutoWalkEnabled)
-        {
-            string label = DescribeLiveEntity(guid);
-            Console.WriteLine(System.FormattableString.Invariant(
-                $"[autowalk-out] op=use target=0x{guid:X8} name=\"{label}\" seq={seq}"));
-        }
-    }
-
-    // Phase D.5.1 — direct use-by-guid for toolbar shortcut clicks.
-    // Mirrors the B.4b far-range send path; no proximity / auto-walk needed
-    // for items already in the player's inventory.
     private void UseItemByGuid(uint guid)
     {
         if (_liveSession is null
             || _liveSession.CurrentState != AcDream.Core.Net.WorldSession.State.InWorld)
             return;
-        var seq  = _liveSession.NextGameActionSequence();
+        uint sequence = _liveSession.NextGameActionSequence();
-        var body = AcDream.Core.Net.Messages.InteractRequests.BuildUse(seq, guid);
+        _liveSession.SendGameAction(
-        _liveSession.SendGameAction(body);
+            AcDream.Core.Net.Messages.InteractRequests.BuildUse(sequence, guid));
-        Console.WriteLine($"[D.5.1] toolbar use-item guid=0x{guid:X8} seq={seq}");
+        Console.WriteLine($"[D.5.1] toolbar use-item guid=0x{guid:X8} seq={sequence}");
     }
 
-    private void SendPickUp(uint itemGuid, uint destinationContainerId, int placement)
-    {
-        if (_liveSession is null
-            || _liveSession.CurrentState != AcDream.Core.Net.WorldSession.State.InWorld)
-        {
-            _debugVm?.AddToast("Not in world");
-            return;
-        }
-
-        // Creature-pickup block (with retail toast). Comes BEFORE the
-        // generic IsPickupableTarget gate so creatures get the specific
-        // "cannot pick up creatures!" message instead of the generic
-        // "can't be picked up!".
-        // Retail string acclient_2013_pseudo_c.txt:401642 (data_7e22b4).
-        if (IsLiveCreatureTarget(itemGuid))
-        {
-            _debugVm?.AddToast(AcDream.Core.Ui.RetailMessages.CannotPickUpCreatures);
-            if (AcDream.Core.Physics.PhysicsDiagnostics.ProbeAutoWalkEnabled)
-                Console.WriteLine($"[B.5] SendPickUp ignored — creature item=0x{itemGuid:X8}");
-            return;
-        }
-
-        // Generic non-pickupable gate (signs, banners, decorative scenery).
-        // Retail string acclient_2013_pseudo_c.txt:401589 (sprintf
-        // "The %s can't be picked up!").
-        if (!IsPickupableTarget(itemGuid))
-        {
-            string label = DescribeLiveEntity(itemGuid);
-            _debugVm?.AddToast(AcDream.Core.Ui.RetailMessages.CantBePickedUp(label));
-            if (AcDream.Core.Physics.PhysicsDiagnostics.ProbeAutoWalkEnabled)
-                Console.WriteLine($"[B.5] SendPickUp ignored — not pickupable item=0x{itemGuid:X8}");
-            return;
-        }
-
-        // B.6 (2026-05-15): same speculative turn-to-target + deferral as
-        // SendUse — close-range pickup rotates locally to face the
-        // item first, then the wire packet fires when the local
-        // overlay reports arrival.
-        //
-        // 2026-05-16: simplified — FIRST send on arrival, not a retry.
-        if (_worldSelectionQuery?.TryGetInteractionTarget(
-                itemGuid,
-                out AcDream.App.Interaction.WorldInteractionTarget pickupTarget) != true)
-        {
-            return;
-        }
-
-        bool closeRange = IsCloseRangeTarget(itemGuid);
-        InstallSpeculativeTurnToTarget(itemGuid);
-
-        if (closeRange)
-        {
-            _pendingPostArrivalAction = new PendingPostArrivalAction(
-                itemGuid,
-                pickupTarget.LocalEntityId,
-                IsPickup: true,
-                destinationContainerId,
-                placement);
-            if (AcDream.Core.Physics.PhysicsDiagnostics.ProbeAutoWalkEnabled)
-                Console.WriteLine($"[B.5] pickup deferred (close-range, turn-first) item=0x{itemGuid:X8}");
-            return;
-        }
-
-        // Far range: send PickUp ONCE. Same auto-fire-via-MoveToChain
-        // callback pattern as SendUse — ACE's chain fires
-        // PutItemInContainer/Move server-side when in range. No
-        // client-side retry; Phase B.6 MoveToState suppression keeps
-        // ACE's chain alive.
-        var seq  = _liveSession.NextGameActionSequence();
-        var body = AcDream.Core.Net.Messages.InteractRequests.BuildPickUp(
-            seq, itemGuid, destinationContainerId, placement);
-        _liveSession.SendGameAction(body);
-        Console.WriteLine($"[B.5] pickup item=0x{itemGuid:X8} container=0x{destinationContainerId:X8} placement={placement} seq={seq}");
-        if (AcDream.Core.Physics.PhysicsDiagnostics.ProbeAutoWalkEnabled)
-        {
-            string label = DescribeLiveEntity(itemGuid);
-            Console.WriteLine(System.FormattableString.Invariant(
-                $"[autowalk-out] op=pickup target=0x{itemGuid:X8} name=\"{label}\" seq={seq}"));
-        }
-    }
-
-    /// <summary>
-    /// 2026-05-16 / R4-V5. Fires the deferred close-range Use/PickUp action
-    /// once the player's moveto completes naturally (the MoveToManager's
-    /// <c>MoveToComplete(None)</c> client seam — the body has finished
-    /// rotating to face / walking to the target; a user-input cancel never
-    /// fires it). This is a FIRST send — not a retry of an earlier failed
-    /// send. Far-range Use/PickUp paths fire the wire packet immediately at
-    /// <see cref="SendUse"/>/<see cref="SendPickUp"/> time and never touch
-    /// <c>_pendingPostArrivalAction</c>.
-    /// </summary>
-    private void OnAutoWalkArrivedSendDeferredAction()
-    {
-        if (_pendingPostArrivalAction is not { } pending)
-            return;
-        _pendingPostArrivalAction = null;
-
-        if (_liveSession is null
-            || _liveSession.CurrentState != AcDream.Core.Net.WorldSession.State.InWorld)
-            return;
-        if (_worldSelectionQuery?.IsCurrent(
-                pending.Guid,
-                pending.LocalEntityId) != true)
-        {
-            return;
-        }
-
-        var seq = _liveSession.NextGameActionSequence();
-        if (pending.IsPickup)
-        {
-            var body = AcDream.Core.Net.Messages.InteractRequests.BuildPickUp(
-                seq,
-                pending.Guid,
-                pending.DestinationContainerId,
-                pending.Placement);
-            _liveSession.SendGameAction(body);
-            Console.WriteLine($"[B.5] pickup-deferred item=0x{pending.Guid:X8} container=0x{pending.DestinationContainerId:X8} placement={pending.Placement} seq={seq}");
-        }
-        else
-        {
-            var body = AcDream.Core.Net.Messages.InteractRequests.BuildUse(seq, pending.Guid);
-            _liveSession.SendGameAction(body);
-            Console.WriteLine($"[B.4b] use-deferred guid=0x{pending.Guid:X8} seq={seq}");
-        }
-    }
-
-    /// <summary>
-    /// B.6 (2026-05-15). Install a local auto-walk overlay against the
-    /// given target entity at Use / PickUp send time. ACE's response
-    /// branches by distance:
-    /// <list type="bullet">
-    ///   <item>Far target → ACE broadcasts a <c>MovementType=6</c>
-    ///     MoveToObject which arrives shortly after and overwrites
-    ///     our speculative state with ACE's wire-supplied use-radius
-    ///     and origin. No conflict; same target either way.</item>
-    ///   <item>Close target → ACE skips MoveToChain (WithinUseRadius
-    ///     shortcut at <c>Player_Move.cs:66</c>) and rotates the body
-    ///     server-side via <c>Rotate(target)</c>. ACE doesn't broadcast
-    ///     anything actionable to us, so our pre-installed overlay
-    ///     handles the local rotation — body turns to face the target
-    ///     in place, then ends.</item>
-    /// </list>
-    /// <para>
-    /// Per-type use radius mirrors the picker's radius heuristic:
-    /// 3 m for creatures, 2 m for doors / lifestones / portals,
-    /// 0.6 m for everything else (ground items).
-    /// </para>
-    /// </summary>
-    /// <summary>
-    /// B.6 (2026-05-15). True if the local player is already inside the
-    /// target's use radius right now — i.e. ACE will NOT auto-walk us
-    /// when we send the action. Used to gate the close-range deferral
-    /// in SendUse / SendPickUp: when close, we hold the wire packet
-    /// until our local rotation overlay reports alignment, then fire.
-    /// </summary>
-    private bool IsCloseRangeTarget(uint targetGuid)
-        => _worldSelectionQuery?.TryGetApproach(targetGuid, out var approach) == true
-            && approach.IsCloseRange;
-
     private bool IsWithinExternalContainerUseRange(uint targetGuid)
         => _worldSelectionQuery?.IsWithinExternalContainerUseRange(targetGuid) ?? true;
 
-    private void InstallSpeculativeTurnToTarget(uint targetGuid)
+    private void SendUse(uint guid)
-    {
+        => _selectionInteractions?.SendUse(guid);
-        if (_playerController is not { } pc
-            || pc.MoveTo is null
-            || _worldSelectionQuery?.TryGetApproach(
-                targetGuid,
-                out AcDream.App.Interaction.InteractionApproach approach) != true)
-            return;
 
-        // Issue #77 fix (2026-05-18) — predict ACE's CanCharge bit
+    private void SendPickUp(uint itemGuid, uint destinationContainerId, int placement)
-        // from local distance so the speculative moveto uses the
+        => _selectionInteractions?.SendPickup(itemGuid, destinationContainerId, placement);
-        // same walk/run as the wire-triggered overwrite that arrives
+
-        // moments later. ACE's Creature.SetWalkRunThreshold sets
+    private void OnAutoWalkArrivedSendDeferredAction()
-        // CanCharge when player→target distance >= WalkRunThreshold /
+        => _selectionInteractions?.OnNaturalMoveToComplete();
-        // 2 = 7.5 m (the 15 m wire default halved). Match exactly so
-        // the speculative install doesn't flip walk↔run when ACE's
-        // MoveToObject broadcast overwrites it (PerformMovement
-        // cancels + restarts — retail-consistent re-target).
-        // R4-V5: retail's client-initiated use flow issues TurnToObject /
-        // MoveToObject through the SAME manager the wire path uses (decomp
-        // §9a/§9b callers) — in-range targets get a pure turn-to-face;
-        // out-of-range targets get the local moveto that ACE's mt-6
-        // broadcast will re-target moments later. MovementParameters ctor
-        // defaults (0x1EE0F: MoveTowards, UseSpheres, threshold 15,
-        // MinDistance 0) match the old BeginServerAutoWalk install's
-        // semantics; only the AP-23 radius + the #77 CanCharge prediction
-        // are non-default.
-        var p = new AcDream.Core.Physics.Motion.MovementParameters
-        {
-            DistanceToObject = approach.UseRadius,
-            CanCharge = approach.CanCharge,
-        };
-        var ms = new AcDream.Core.Physics.MovementStruct
-        {
-            ObjectId = targetGuid,
-            TopLevelId = targetGuid,
-            Pos = new AcDream.Core.Physics.Position(
-                approach.Player.CellId, approach.Target.Entity.Position,
-                System.Numerics.Quaternion.Identity),
-            Params = p,
-            Type = approach.IsCloseRange
-                ? AcDream.Core.Physics.MovementType.TurnToObject
-                : AcDream.Core.Physics.MovementType.MoveToObject,
-        };
-        // R5-V3 (#171, diff-review find): retail resolves the TARGET's
-        // PartArray radius/height at EVERY MoveToObject call site — the
-        // client-initiated use flow included (CPhysicsObj::MoveToObject
-        // 0x005128e9/0x00512903), not just the wire mt-6 route. Without
-        // this, the player's now-real own radius made the UseSpheres
-        // arrival hybrid (centerDist − playerRadius ≤ useRadius) — the
-        // auto-walk stopped ~one player-radius farther out than the AP-23
-        // constants intended, and the two MoveToObject sites disagreed.
-        (ms.Radius, ms.Height) = (approach.TargetRadius, approach.TargetHeight);
-        // Part of this install's AP-23 adaptation: store the autonomy flag
-        // exactly as the wire mt-6 this install anticipates would (the P1
-        // unpack store, IsAutonomous=false) — without it the per-tick
-        // pump's A3 dispatch stays on the raw branch (the user's last input
-        // set it autonomous) and clobbers this moveto's dispatched motions
-        // with the idle raw state.
-        _playerController.SetLastMoveWasAutonomous(false);
-        // R5-V5: through the facade (MovementManager::PerformMovement
-        // 0x005240d0) — retail's client-initiated use flow reaches the same
-        // manager the wire path uses.
-        pc.Movement.PerformMovement(ms);
-    }
 
     private uint? SelectClosestCombatTarget(bool showToast)
-    {
+        => _selectionInteractions?.SelectClosestCombatTarget(showToast);
-        AcDream.App.Interaction.ClosestCombatTarget? closest =
-            _worldSelectionQuery?.FindClosestHostileMonster();
-        uint? bestGuid = closest?.ServerGuid;
 
-        if (bestGuid is { } selection)
-            _selection.Select(selection, AcDream.Core.Selection.SelectionChangeSource.Keyboard);
-        else
-            _selection.Clear(AcDream.Core.Selection.SelectionChangeSource.Keyboard);
-        if (bestGuid is { } selected)
-        {
-            string label = DescribeLiveEntity(selected);
-            float distance = MathF.Sqrt(closest!.Value.DistanceSquared);
-            Console.WriteLine($"combat: selected target 0x{selected:X8} {label} dist={distance:F1}");
-            if (showToast)
-                _debugVm?.AddToast($"Target {label}");
-        }
-        else if (showToast)
-        {
-            _debugVm?.AddToast("No monster target");
-            Console.WriteLine("combat: no creature target found");
-        }
-
-        return bestGuid;
-    }
-
-    private bool IsLiveCreatureTarget(uint guid)
-        => _worldSelectionQuery?.IsCreature(guid) == true;
-
-    private bool IsLiveHostileMonsterTarget(uint guid)
-        => _worldSelectionQuery?.IsHostileMonster(guid) == true;
-
-    /// <summary>
-    /// True if the selected-object strip should show a Health meter for <paramref name="guid"/>.
-    /// Exact projection of retail's <c>IsPlayer() || pet_owner ||
-    /// ClientCombatSystem::ObjectIsAttackable()</c> gate from
-    /// <c>gmToolbarUI::HandleSelectionChanged @ 0x004BF380</c>.
-    /// </summary>
     private bool IsHealthBarTarget(uint guid)
         => _worldSelectionQuery?.ShouldShowHealth(guid) == true;
 
@@ -14288,91 +13845,6 @@ public sealed class GameWindow : IDisposable
     /// why our previous mesh-AABB indicator was smaller than retail's.
     /// </para>
     /// </summary>
-    private bool TryGetEntitySelectionSphere(uint guid,
-                                              out System.Numerics.Vector3 worldCenter,
-                                              out float worldRadius)
-    {
-        if (_worldSelectionQuery is { } query)
-            return query.TryGetSelectionSphere(guid, out worldCenter, out worldRadius);
-        worldCenter = default;
-        worldRadius = 0f;
-        return false;
-    }
-
-    /// <summary>
-    /// 2026-05-15. Retail-faithful gate for R-key Use / F-key PickUp.
-    /// Returns true when the entity is interactable from the world per
-    /// the server-supplied <c>ITEM_USEABLE _useability</c> field
-    /// (acclient.h:6478) — specifically when the <c>USEABLE_REMOTE
-    /// (0x20)</c> bit is set OR a composite form containing it
-    /// (<c>USEABLE_REMOTE_NEVER_WALK = 0x60</c>, the
-    /// <c>SOURCE_X_TARGET_REMOTE</c> variants in the 0x200000+ range).
-    ///
-    /// <para>
-    /// Retail behaviour for non-useable entities (signs, banners,
-    /// decorative scenery): the R-key does nothing — no walk, no Use
-    /// packet, no toast. The retail client checks useability before
-    /// any action and silently ignores the press. We honor that with
-    /// a silent early return at the call site.
-    /// </para>
-    ///
-    /// <para>
-    /// <b>Fallback when useability is unknown.</b> The wire's
-    /// <c>weenieFlags &amp; 0x10</c> bit gates whether ACE serializes
-    /// useability at all. If absent, <see cref="CreateObject.Parsed.Useability"/>
-    /// is null. Conservatively we permit Use for entities we've
-    /// historically been able to interact with — creatures, doors,
-    /// lifestones, portals, corpses — to avoid regressing the existing
-    /// M1 flows. Pure-scenery untyped entities (the sign case) fall
-    /// through to "blocked".
-    /// </para>
-    /// </summary>
-    private bool IsUseableTarget(uint guid)
-        => _worldSelectionQuery?.IsUseable(guid) == true;
-
-    /// <summary>
-    /// 2026-05-16 — pickup gate is ItemType-based, NOT useability-based.
-    ///
-    /// <para>
-    /// The earlier <c>(useability &amp; USEABLE_REMOTE) != 0u</c> check
-    /// was a misread of the audit. USEABLE_REMOTE (0x20) gates the USE
-    /// action ("can the player activate this item from the world");
-    /// PICKUP is a separate action governed by retail's
-    /// PutItemInContainer handler, which accepts any small-item-class
-    /// entity from the world regardless of useability bits. A spell
-    /// component with useability=USEABLE_NO=1 is still pickupable in
-    /// retail — USEABLE_NO blocks using the component (you can't
-    /// "activate" it standalone), not picking it up.
-    /// </para>
-    ///
-    /// <para>
-    /// Now matches retail: a non-Stuck small-item ItemType class
-    /// → pickupable. Server validates the request server-side
-    /// (in-range, target-still-exists, container-has-room).
-    /// </para>
-    /// </summary>
-    private bool IsPickupableTarget(uint guid)
-        => _worldSelectionQuery?.IsPickupable(guid) == true;
-
-    private AcDream.Core.Items.ItemType LiveItemType(uint guid) =>
-        _worldSelectionQuery?.GetItemType(guid) ?? AcDream.Core.Items.ItemType.None;
-
-    private string? LiveName(uint guid) => Objects.Get(guid)?.Name;
-
-    private string DescribeLiveEntity(uint guid)
-    {
-        return _worldSelectionQuery?.Describe(guid) ?? $"0x{guid:X8}";
-    }
-
-    /// <summary>
-    /// K.1b: Tab handler extracted into a method so the dispatcher
-    /// subscriber can call it. Same body as the previous Tab branch in
-    /// the legacy direct keyboard handler — toggle player↔fly mode, set
-    /// up <see cref="PlayerMovementController"/> + <see cref="ChaseCamera"/>
-    /// when entering player mode, tear them down on exit.
-    /// K.2: also disarms the auto-entry trigger when the user toggles
-    /// manually (their choice wins).
-    /// </summary>
     private void TogglePlayerMode()
     {
         // Phase B.2 guard: only active when a live session is in-world.