fix(ui): select items before drag mesh

Port ItemList_BeginDrag's select-before-waiting order so a direct press-drag shows the selection indicator on its first frame across inventory, paperdoll, and toolbar item lists.

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

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

@@ -51,6 +51,8 @@ ItemList.PrepareDragIcon(cell):
 ItemList.ItemList_BeginDrag(cell):
     if PrepareDragIcon(cell) failed:
         return
+    if cell is not selected:
+        SetSelectedObject(cell.itemID, false)
     if list is not vendor, salvage, or shortcut list:
         cell.SetWaitingState(true)
     StartDragAndDrop(cell.m_dragIcon, hotspot = 16,16)
@@ -98,8 +100,11 @@ keeps drag-accept feedback topmost.
   `GetDragGhost` returns the latter, while `OnDraw` keeps the former in the
   source cell.
 - `UiRoot` owns the generic source-active lifecycle, including release outside
-  UI and source-subtree removal. `UiItemSlot` maps that lifecycle to the retail
-  waiting visual for physical lists; shortcut aliases remain unghosted.
+  UI and source-subtree removal. It dispatches `DragBegin` before enabling the
+  source-active mesh, matching retail's select-then-waiting order. The inventory,
+  paperdoll, and toolbar handlers select an unselected dragged item synchronously.
+  `UiItemSlot` maps the lifecycle to the retail waiting visual for physical lists;
+  shortcut aliases remain unghosted.
 - `UiItemSlot.WaitingSprite` is the authored `0x0600109A` mesh, not a procedural
   tint.
 
@@ -107,6 +112,8 @@ keeps drag-accept feedback topmost.
 
 - `DragDropSpineTests.GetDragGhost_prefersDedicatedUnderlayFreeTexture`
 - `DragDropSpineTests.InventoryDrag_ghostsSourceUntilRelease`
+- `InventoryControllerTests.OnDragLift_selectsItem_butKeepsItUntilServerConfirms`
+- `PaperdollControllerTests.DragLift_selectsEquippedItem_beforeWaitingVisual`
 - `DragDropSpineTests.ShortcutDrag_doesNotGhostSource`
 - `UiItemSlotTests.DefaultWaitingSprite_isRetailGhostMesh`
 - `InventoryControllerTests.Empty_sprites_and_drop_feedback_are_applied_per_list_role`