fix(chargen): Campaign CC gate round 1 closeout — Group 1: real color wheel wiring

Lands Batch G's two STOPPED items, making the real palette-color swatch
wheel visually live instead of inert:

- UiButton and UiDatElement gain a per-instance Tint property threaded
  into every existing DrawSprite call (defaults to Vector4.One, so every
  pre-existing button/element is byte-identical unless a caller sets a
  non-identity tint).
- CharacterCreationAppearancePage now sets Tint directly on each color
  swatch button and the GradCircle element, replacing the Batch G
  flat-fill ChargenSwatchColorTile overlay outright — an opaque
  rectangle drawn on top can never reproduce retail's actual
  SurfaceWindow::BlitAndColor(..., Blit_Multiply, color) multiply blend,
  only a genuine per-instance sprite tint can, so the overlay approach is
  deleted rather than layered under the new mechanism.
- CharacterCreationUiController and RetailUiRuntime grow pass-through
  properties (AppearancePalSetSource/AppearanceClothingTableSource/
  AppearancePaletteColorSource) mirroring the existing PreviewControl
  seam, so LivePresentationComposition can wire a DAT-backed
  ChargenAppearanceCatalog into the Appearance page (wiring itself lands
  with the Group 3 commit, since it shares a file with an unrelated F16
  fix).

Register: AP-216/AP-217 RETIRED (161 -> now further reduced in later
commits) — both rows' remaining gaps are closed, not merely narrowed.
CharacterCreationAppearancePageSwatchColorTests updated for the new
Tint-based assertions (two pre-existing assertions were carried over
incorrectly from the old overlay-visibility model and are corrected).

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

src/AcDream.App/UI/UiButton.cs

@@ -153,6 +153,19 @@ public sealed class UiButton : UiElement, IUiGlobalTimeListener, IUiDatStateful
     /// </summary>
     public uint? FaceFileOverride { get; set; }
 
+    /// <summary>
+    /// Campaign CC gate round 1 closeout (Group 1, R2-5): per-instance
+    /// multiplicative sprite tint, threaded into every <see cref="UiRenderContext.DrawSprite"/>
+    /// call this class makes (main face, face-segment, drag-acceptance
+    /// overlay) — retail's own <c>SurfaceWindow::BlitAndColor(...,
+    /// Blit_Multiply, color)</c>. Default <see cref="Vector4.One"/> (white,
+    /// full alpha) leaves every DrawSprite call byte-identical to before
+    /// this property existed; only a caller that explicitly sets a
+    /// non-identity tint (e.g. <see cref="Layout.CharacterCreationAppearancePage"/>'s
+    /// color-wheel swatches) changes what draws.
+    /// </summary>
+    public Vector4 Tint { get; set; } = Vector4.One;
+
     /// <summary>Additional left inset for left-aligned labels.</summary>
     public float LabelOffsetX { get; set; } = 3f;
 
@@ -469,7 +482,7 @@ public sealed class UiButton : UiElement, IUiGlobalTimeListener, IUiDatStateful
                     float faceWidth = FaceWidth > 0f ? FaceWidth : Width;
                     float faceHeight = FaceHeight > 0f ? FaceHeight : Height;
                     ctx.DrawSprite(tex, FaceLeft, FaceTop, faceWidth, faceHeight,
-                        0, 0, faceWidth / tw, faceHeight / th, Vector4.One);
+                        0, 0, faceWidth / tw, faceHeight / th, Tint);
                 }
             }
         }
@@ -525,7 +538,7 @@ public sealed class UiButton : UiElement, IUiGlobalTimeListener, IUiDatStateful
         {
             var (tex, _, _) = _resolve(dragSprite);
             if (tex != 0)
-                ctx.DrawSprite(tex, 0f, 0f, Width, Height, 0f, 0f, 1f, 1f, Vector4.One);
+                ctx.DrawSprite(tex, 0f, 0f, Width, Height, 0f, 0f, 1f, 1f, Tint);
         }
     }
 
@@ -647,7 +660,7 @@ public sealed class UiButton : UiElement, IUiGlobalTimeListener, IUiDatStateful
         // first reflowed by its own four-edge retail layout policy.
         ctx.DrawSprite(texture, rect.X0, rect.Y0, rect.Width, rect.Height,
             0f, 0f, (float)rect.Width / textureWidth, (float)rect.Height / textureHeight,
-            Vector4.One);
+            Tint);
     }
 
     private void AddAvailableStates(ElementInfo mediaInfo)