feat(ui): D.2b item interaction + retail cursors + live character sheet

Lands the codex-worktree D.2b stream plus the extraction the 2026-07-02
UI architecture review mandated before commit:

- ItemInteractionController: single owner of double-click use/equip/
  container-open, targeted-use mode (health kits), drag-out drop;
  toolbar shortcut drags don't drop the real item. ItemEquipRules for
  multi-slot (coat) coverage via equip masks.
- Cursor phase: CursorFeedbackController (semantic priority chain:
  drag > resize > window-move > target-mode > text) + RetailCursorCatalog
  (enums 0x27/0x28/0x29, hotspot 14,14; ClientUISystem::UpdateCursorState
  0x00564630) resolved through the portal EnumIDMap chain by
  RetailCursorResolver; RetailCursorManager applies dat cursor art to the
  OS cursor. Register row AP-72 covers the OS standard-cursor fallback.
- Character window goes live: CharacterSheetProvider owns sheet assembly,
  XP-curve/raise-cost math and the raise flow — extracted out of
  GameWindow per Code Structure Rule 1 instead of committing the ~430-line
  feature body there. Optimistic XP/credit debits go through eventful
  store APIs (new ClientObjectTable.UpdateInt64Property +
  LocalPlayerState.DebitIntProperty/DebitInt64Property) instead of raw
  property-dictionary writes; register row AP-73 covers the still-missing
  raise ledger (#163).
- RetailWindowFrame: the shared nine-slice window mount recipe; the
  character window uses it, remaining windows migrate via #164.
- Status-bar buttons toggle inventory/character windows; retail row-major
  backpack ordering; WorldSession.SendUseWithTarget + raise/train sends.

GameWindow shrinks 14,214 -> 13,877 lines despite the new features; the
sheet/raise logic is unit-tested in CharacterSheetProviderTests instead
of trapped in the god object. Build green; full suite 3,286 tests pass.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

tests/AcDream.App.Tests/UI/Layout/PaperdollControllerTests.cs

@@ -11,6 +11,8 @@ public class PaperdollControllerTests
     private const uint Player = 0x50000001u;
     private const uint Pack   = 0x40000005u;
     private const uint HeadSlot   = 0x100005ABu;  // HeadWear 0x1
+    private const uint ChestSlot  = 0x100001E2u;  // ChestWear 0x2
+    private const uint ChestArmorSlot = 0x100005ACu;  // ChestArmor 0x200
     private const uint ShieldSlot = 0x100001E1u;  // Shield 0x200000
     private const uint WeaponSlot = 0x100001DFu;  // composite 0x3500000
     private const uint FingerLSlot= 0x100001DCu;  // FingerWearLeft 0x40000
@@ -19,7 +21,7 @@ public class PaperdollControllerTests
 
     private static (ImportedLayout layout, Dictionary<uint, UiItemList> lists) BuildLayout()
     {
-        var ids = new[] { HeadSlot, ShieldSlot, WeaponSlot, FingerLSlot };
+        var ids = new[] { HeadSlot, ChestSlot, ChestArmorSlot, ShieldSlot, WeaponSlot, FingerLSlot };
         var lists = new Dictionary<uint, UiItemList>();
         var byId  = new Dictionary<uint, UiElement>();
         var root  = new RootElement { Width = 224, Height = 214 };
@@ -112,6 +114,47 @@ public class PaperdollControllerTests
         Assert.Equal((uint)EquipMask.FingerWearLeft, wields[0].mask);   // ValidLocations & slotMask = left finger only
     }
 
+    [Fact]
+    public void HandleDropRelease_onAutoWearSlot_sendsFullValidLocations()
+    {
+        var (layout, lists) = BuildLayout();
+        var objects = new ClientObjectTable();
+        const EquipMask coatMask =
+            EquipMask.ChestWear
+            | EquipMask.UpperArmWear
+            | EquipMask.LowerArmWear;
+        SeedPackItem(objects, 0xE02u, coatMask);
+        var wields = new List<(uint item, uint mask)>();
+        var ctrl = Bind(layout, objects, wields);
+        var payload = new ItemDragPayload(0xE02u, ItemDragSource.Inventory, 0, lists[ChestSlot].Cell);
+
+        ctrl.HandleDropRelease(lists[ChestSlot], lists[ChestSlot].Cell, payload);
+
+        Assert.Equal((uint)coatMask, wields[0].mask);
+        Assert.Equal(coatMask, objects.Get(0xE02u)!.CurrentlyEquippedLocation);
+    }
+
+    [Fact]
+    public void HandleDropRelease_onArmorAutoWearSlot_sendsFullValidLocations()
+    {
+        var (layout, lists) = BuildLayout();
+        var objects = new ClientObjectTable();
+        const EquipMask hauberkMask =
+            EquipMask.ChestArmor
+            | EquipMask.AbdomenArmor
+            | EquipMask.UpperArmArmor
+            | EquipMask.LowerArmArmor;
+        SeedPackItem(objects, 0xE03u, hauberkMask);
+        var wields = new List<(uint item, uint mask)>();
+        var ctrl = Bind(layout, objects, wields);
+        var payload = new ItemDragPayload(0xE03u, ItemDragSource.Inventory, 0, lists[ChestArmorSlot].Cell);
+
+        ctrl.HandleDropRelease(lists[ChestArmorSlot], lists[ChestArmorSlot].Cell, payload);
+
+        Assert.Equal((uint)hauberkMask, wields[0].mask);
+        Assert.Equal(hauberkMask, objects.Get(0xE03u)!.CurrentlyEquippedLocation);
+    }
+
     [Fact]
     public void Empty_equip_slot_shows_the_configured_frame()  // visible frame so all positions are usable (Slice 1; the doll is Slice 2)
     {