fix(inventory): correct drag overlay priority

Keep the persistent selection indicator above retail's waiting mesh, use the normal green accept circle for backpack-grid placement, and reserve the green drop-in arrow for bag-column containers as ItemList_DragOver does.

Co-Authored-By: Codex <codex@openai.com>

docs/plans/2026-04-11-roadmap.md

@@ -496,7 +496,7 @@ behavior. Estimated 17–26 days focused work, 3–5 weeks calendar.
 - **✓ SHIPPED — Wave 4.4d toolbar launchers + Use/Examine.** All seven authored launchers are discovered through their DAT panel-id attribute; mounted Inventory/Character panels toggle through the registry and the other five buttons are ghosted. Typed window-visibility events own Highlight/Normal state. Use and Examine act on selection or enter their one-shot retail target modes, with exact Appraise wire dispatch and retail cursors. Warning-free App build and 4,747-pass / 5-skip Release suite are green; the connected live gate passed 2026-07-11. AP-101 is narrowed to the remaining ammo-number display.
 - **Wave 4.4e implemented — exact missile ammo number (live gate pending).** Pure Core reproduces retail's thrown-weapon-vs-separate-ammo resolution over the ordered player equipment list and its zero-to-one count normalization. Relevant equipment/stack events update authored missile indicator `0x10000194` with the DAT font. Warning-free Release build and 4,754-pass / 5-skip suite are green; AP-101 is retired.
 - **Wave 4.5 implemented — retail primary-weapon switching (corrective live gate pending).** Inventory double-click now routes through a focused `AutoWieldController`: the occupied `0x03500000` weapon-ready group is returned to the player container, followed when necessary by an incompatible shield or mismatched ammo; each blocker waits for authoritative `InventoryPutObjInContainer` before the next step, then `GetAndWieldItem` equips the requested bow/sword/caster/two-hander. The transaction remains inventory-busy through the exact authoritative `WieldObject` acknowledgement, independent of the object table's rollback counter, matching retail's waiting state and preventing rapid switches from overlapping or remaining stuck. `CreateObject` retains exact `AmmoType` for compatibility. The same transaction runs in peace and war; ACE owns the latter's old-stance → peace → new-stance motion chain. Player PropertyInt 40 updates `CombatState`, keeping toolbar/combat UI synchronized with ACE's selected Melee/Missile/Magic stance. Research: `docs/research/2026-07-12-retail-weapon-switch-pseudocode.md`.
-- **Wave 4 inventory drag visuals implemented — live visual gate pending.** `IconComposer` now preserves retail's separate underlay-free `m_pDragIcon` for cursor tracking across inventory, paperdoll, and toolbar bindings. Physical source cells keep their full icon in place and reveal authored ghost mesh `0x0600109A` from drag begin through every release/cancel path; shortcut aliases remain unghosted. AP-47 retired. Research: `docs/research/2026-07-13-retail-item-drag-visuals-pseudocode.md`.
+- **Wave 4 inventory drag visuals implemented — corrective live visual gate pending.** `IconComposer` now preserves retail's separate underlay-free `m_pDragIcon` for cursor tracking across inventory, paperdoll, and toolbar bindings. Physical source cells keep their full icon in place and reveal authored ghost mesh `0x0600109A` from drag begin through every release/cancel path, with the persistent selection square above the mesh; shortcut aliases remain unghosted. `ItemList_DragOver` destination states are split exactly: contents-grid placement uses the green accept circle `0x060011F9`, while side-bag/main-pack container drop-in uses the green arrow `0x060011F7`. AP-47 retired. Research: `docs/research/2026-07-13-retail-item-drag-visuals-pseudocode.md`.
 - **M2 held-object parenting shipped and live-gated 2026-07-11.** The combat toggle now ports `GetDefaultCombatMode` over ordered equipped contents, so a bow requests Missile instead of the old hardcoded Melee. CreateObject preserves parent/placement/timestamp fields, `0xF749` ParentEvent is handled, and `EquippedChildRenderController` renders the weapon as a separate child composed from the animated hand part + holding frame + child placement frame. Live gate passed: bow selected missile stance, rendered in-hand, followed animation, unequipped cleanly, and melee remained correct. App Release builds with zero warnings; the full 4,765-pass / 5-skip suite is green. AP-111 is retired; research: `docs/research/2026-07-11-combat-default-and-parent-event-pseudocode.md`.
 - **M2 local attack receive funnel implemented 2026-07-11; live gate pending.** Retail `ExecuteAttack` only sends the request; ACE chooses the concrete melee/missile action and returns it in a non-autonomous mt-0 `UpdateMotion`. The local branch now runs that state through the same constructor-defaulted `MoveToInterpretedState` funnel and 15-bit action-stamp gate as remotes, then applies sticky/long-jump tails. The old local-only direct `Commands[]` replay is deleted. Shared conversion lives in `InboundInterpretedMotionFactory`; research: `docs/research/2026-07-11-local-combat-motion-pseudocode.md`.
 - **M2 basic retail combat bar implemented 2026-07-11; corrective live visual gate pending.** Production mounts authored `gmCombatUI` LayoutDesc `0x21000073`, shows it only for Melee/Missile, and routes mouse plus keyboard through one `CombatAttackController`. Corrections include the authored wider centered dark-red child range (accepted IA-20), full-width left-to-right bright live attack-charge feedback, exact Speed-left/Power-right justification, silent control-only `AttackDone(ActionCancelled)`, target-frame Keep in View with manual orbit, and persistent corpse motion: the AP-80 velocity-only NPC adaptation can now replace only Ready/Walk/Run, never authoritative Dead/actions. `CombatTargetController` ports the selection-cleared AutoTarget consumer, so a selected creature's authoritative Dead motion clears it and selects the nearest eligible creature when enabled. The 2026-07-12 replacement-corpse correction unifies both multi-frame and static/reactive spawns behind retail's CreateObject lifecycle: apply the wire's Dead state while detached, then `MotionTableManager::HandleEnterWorld` strips Ready→Dead links before the first in-world tick; multiple corpses remaining fallen passed the live user gate that day. Follow-up #205 makes the toolbar read the final canonical selection after a reentrant Auto Target notice and restricts automatic candidates to hostile non-player monsters (intentional PK-edge divergence IA-19); that live gate also passed 2026-07-12. Research: `docs/research/2026-07-11-retail-combat-bar-pseudocode.md`, `docs/research/2026-07-11-combat-target-camera-pseudocode.md`, `docs/research/2026-07-12-death-and-auto-target-pseudocode.md`; AP-24/AP-95 retired, AP-80 narrowed, AP-110 narrowed, AP-112 records the remaining attack-start and exact trained-Recklessness seams.

docs/research/2026-07-13-retail-item-drag-visuals-pseudocode.md

@@ -65,6 +65,30 @@ on drag release/cancel:
     hide m_elem_Icon_Ghosted
 ```
 
+## Destination feedback and source overlay order
+
+`UIElement_ItemList::ItemList_DragOver @ 0x004e3400` distinguishes an ordinary
+slot insertion from dropping into a container:
+
+```text
+if target list is a container selector
+   and target cell is occupied by a container
+   and that container has an empty item slot:
+    target.SetDragAcceptState(0x10000046)  # ItemSlot_DragOver_DropIn
+                                           # 0x060011F7 green arrow
+else if target accepts an ordinary item-list placement:
+    target.SetDragAcceptState(0x10000041)  # ItemSlot_DragOver_Accept
+                                           # 0x060011F9 green circle
+else:
+    target.SetDragAcceptState(0x10000040)  # 0x060011F8 reject
+```
+
+Therefore the backpack contents grid uses the green circle; the side-bag column
+and main-pack container cell use the green drop-in arrow. The selected/open
+indicators remain visible while `m_elem_Icon_Ghosted` is active, so the
+procedural leaf draws the waiting mesh before those persistent indicators and
+keeps drag-accept feedback topmost.
+
 ## Port mapping
 
 - `IconComposer` caches the underlay-free composite separately and exposes
@@ -85,6 +109,6 @@ on drag release/cancel:
 - `DragDropSpineTests.InventoryDrag_ghostsSourceUntilRelease`
 - `DragDropSpineTests.ShortcutDrag_doesNotGhostSource`
 - `UiItemSlotTests.DefaultWaitingSprite_isRetailGhostMesh`
+- `InventoryControllerTests.Empty_sprites_and_drop_feedback_are_applied_per_list_role`
 - Existing `IconComposerTests.TwoStageWithEffect_copiesTilePixelBeforeUnderlay`
   locks the two-stage composition order.
-