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>

src/AcDream.App/Studio/SampleData.cs

@@ -122,12 +122,14 @@ public static class SampleData
     /// synthetic character. Values are plausible retail-scale numbers so the
     /// report renders with well-proportioned text in all sections.
     /// </summary>
-    public static CharacterSheet SampleCharacter() => new()
+    public static CharacterSheet SampleCharacter() => SampleCharacter(null);
+
+    public static CharacterSheet SampleCharacter(string? name) => new()
     {
-        Name       = "Studio Player",
+        Name       = string.IsNullOrWhiteSpace(name) ? "Studio Player" : name,
         Level      = 126,
-        Race       = "Aluvian",
-        Heritage   = "Aluvian Heritage",
+        Gender     = "Female",
+        Heritage   = "Aluvian",
         Title      = "the Adventurer",
         BirthDate  = "January 5, 2001",
         PlayTime   = "2 years, 114 days, 4 hours",
@@ -166,6 +168,7 @@ public static class SampleData
         // Focus@10 → 110 matches the authoritative retail screenshot (spec §4).
         // Formula bracket at value=10: ExperienceToAttributeLevel(11) − ExperienceToAttributeLevel(10).
         AttributeRaiseCosts = new long[] { 0L, 95L, 100L, 0L, 110L, 105L, 90L, 88L, 112L },
+        AttributeRaise10Costs = new long[] { 0L, 950L, 1_000L, 0L, 1_100L, 1_050L, 900L, 880L, 1_120L },
 
         // Real SkillTable icon IDs and train/specialize costs from client_portal.dat
         // SkillTable 0x0E000004. gmSkillUI groups/sorts these at bind time.