fix(ui): port retail item drag visuals

Keep retail's underlay-free m_pDragIcon separate from the full cell icon and reveal the authored ghost mesh on physical source cells for the complete drag lifecycle. This removes the backpack backing from the cursor and retires AP-47.

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

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

@@ -496,6 +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`.
 - **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.