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.Core.Net.Tests/Messages/CreateObjectTests.cs

@@ -156,6 +156,22 @@ public sealed class CreateObjectTests
         Assert.Equal(2.5f, parsed.Value.UseRadius!.Value, precision: 3);
     }
 
+    [Fact]
+    public void TryParse_WeenieFlagsTargetType_ReadsTargetType()
+    {
+        byte[] body = BuildMinimalCreateObjectWithWeenieHeader(
+            guid: 0x50000009u,
+            name: "Healing Kit",
+            itemType: (uint)ItemType.Misc,
+            weenieFlags: 0x00080000u,
+            targetType: (uint)ItemType.Creature);
+
+        var parsed = CreateObject.TryParse(body);
+
+        Assert.NotNull(parsed);
+        Assert.Equal((uint)ItemType.Creature, parsed!.Value.TargetType);
+    }
+
     // -----------------------------------------------------------------------
     // D.5.1 (2026-06-16): IconId was discarded at cs:516 — surface it so the
     // action bar / equipment UI can read icon dat ids from spawn messages.
@@ -451,6 +467,7 @@ public sealed class CreateObjectTests
         uint? value = null,
         uint? useability = null,
         float? useRadius = null,
+        uint? targetType = null,
         uint iconOverlayId = 0,
         uint iconUnderlayId = 0,
         // intermediate fields for cursor-arithmetic test
@@ -516,7 +533,7 @@ public sealed class CreateObjectTests
             BinaryPrimitives.WriteSingleLittleEndian(tmp, useRadius ?? 0f);
             bytes.AddRange(tmp.ToArray());
         }
-        if ((weenieFlags & 0x00080000u) != 0) WriteU32(bytes, 0);  // TargetType u32
+        if ((weenieFlags & 0x00080000u) != 0) WriteU32(bytes, targetType ?? 0u);  // TargetType u32
         if ((weenieFlags & 0x00000080u) != 0) WriteU32(bytes, uiEffects);  // UiEffects u32
         if ((weenieFlags & 0x00000200u) != 0) bytes.Add(0);        // CombatUse sbyte/1 byte
         if ((weenieFlags & 0x00000400u) != 0) WriteU16(bytes, structure ?? 0);  // Structure u16