fix(chargen): Campaign CC gate round 1 Batch C — rich text + labels + backdrops

Commit 1/3: chargen-scoped, low blast-radius fixes.

- New DatRichText helper: escape-normalize + word-wrap + per-segment
  palette color, porting UIElement_Text::SetStringInfoWithFont /
  AppendStringInfoWithFont's composition model. Routes the Heritage
  (GF-2), Town (GF-11a), and Profession (GF-3) description boxes
  through it instead of a raw unwrapped single-Line LinesProvider.
  Heritage headers use font-color palette index 1 (green), bodies
  index 0 (white), matching AppendStringInfoWithFont's own font-index
  argument. Town's diagnosed GF-11a root cause: a single un-wrapped
  line meant the town-specific suffix rendered past the clipped
  viewport, so switching towns looked like "text never changes" even
  though the underlying composed string genuinely differed.

- GF-3: bind the Profession page's description textbox (0x100003e0,
  gmCGProfessionPage::InitializePage @0x00483068) and compose its
  per-template text (UpdateProfession @0x004821b0's CustomText/
  BowText/SwashText/LifeText/WarText/WayText/SoldierText, plain
  SetStringInfo — no palette).

- GF-4: UiButton gains a coexisting ValueLabel/ValueBox/ValueFont/
  ValueColor slot alongside Label. Retail's chargen display buttons
  (avail/health/stamina/mana credits, 0x100003e2-e5/0x100003f9)
  author their caption directly on P0x17 AND carry a separate,
  media-less Type-12 value child that UiButton.ConsumesDatChildren
  used to drop entirely — pages substituted the button's own Label,
  destroying the caption. DatWidgetFactory.BuildButton now surfaces
  that child (gated on ReferenceEquals(labelInfo, info) — own-caption
  buttons only) instead. The six Profession slider name labels
  (0x100002ed, CharGenState::GetAttributeName @0x005C3A20's six
  hardcoded literals) resolve as UiButton in this port (live-DAT-
  measured Type 1 — retail's UIElement_Button is DynamicCast(0xc)-
  compatible with UIElement_Text) and are written once at
  construction, matching retail's own single InitializePage write.

- GF-6/AP-218: gmCGAppearancePage::Update writes a heritage-flavored
  STATIC caption to the Hair/Eyes/Skin spins (plain / GearText_* /
  OlthoiText_* variants) — never an index. Removed the prior 1-based-
  ordinal/gear-name substitution entirely; the other six spins keep
  their DAT-authored caption untouched, matching retail exactly.

- Root 1d: wire the Heritage (0x100003be, 13 states) and Profession
  (0x100003d8, 7 states) backdrop SetState cascades
  (gmCGHeritagePage::Update / gmCGProfessionPage::UpdateProfession).

- AP-216/AP-217 (partial, register updated honestly): swatches beyond
  the current part's real color count now hide (DoColorSpots' blank-
  blit half); the GradCircle now blanks for Eyes (DoGradDisk's blank-
  plug half). The "paint with the actual represented/current color"
  halves stay open — they need a PalSet/Palette-id -> RGB pipeline no
  chargen page reads at runtime yet, judged disproportionate to add
  alongside this batch's other ~10 fixes.

Register: AP-215 rewritten (item 2's "ordinal" framing is stale after
GF-6; restated as the icon-thumbnail gap), AP-216/AP-217 rewritten
(partially closed), AP-218 retired, AD-103 retired (the swallowed-
child Label substitution AD-103 tracked is replaced by ValueLabel's
own-geometry surfacing).

22 new tests (DatRichText unit tests, UiButton/DatWidgetFactory
ValueLabel tests, live-DAT structural pins, controller behavioral
tests) — all green. Full App suite (Release, live-DAT):
5300 passed / 1 pre-existing unrelated flake (PortalProjectionTests
allocation test, passes in isolation) / 3 skipped, up from the
baseline 5282/3.

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

src/AcDream.App/UI/UiButton.cs

@@ -179,6 +179,43 @@ public sealed class UiButton : UiElement, IUiGlobalTimeListener, IUiDatStateful
     /// </summary>
     public (float X, float Y, float Width, float Height)? LabelBox { get; set; }
 
+    /// <summary>
+    /// GF-4a (Campaign CC gate round 1 Batch C): optional secondary VALUE
+    /// text, coexisting with <see cref="Label"/> (the authored CAPTION).
+    /// Retail's chargen display buttons (Attribute/Skill Credits, Health,
+    /// Stamina, Mana — <c>0x100003e2-e5</c>, <c>0x100003f9</c>) author the
+    /// caption directly as this element's own dat property <c>0x17</c>
+    /// AND carry a SEPARATE, media-less Type-12 child for the live value
+    /// (<c>gmCGProfessionPage::InitializePage @0x00482f90-0x00483062</c>,
+    /// <c>gmCGSkillsPage::InitializePage @0x00481e1c</c>) —
+    /// <see cref="UiButton"/> consumes ALL of its dat children
+    /// (<see cref="ConsumesDatChildren"/>), which used to mean a page
+    /// controller had nowhere faithful to put the value except
+    /// overwriting <see cref="Label"/> itself, destroying the caption.
+    /// <see cref="Layout.DatWidgetFactory.BuildButton"/> now surfaces that
+    /// child's geometry/font/color here instead. Null (default) draws
+    /// nothing extra — every pre-existing button that only ever wrote
+    /// <see cref="Label"/> is unaffected.
+    /// </summary>
+    public string? ValueLabel { get; set; }
+
+    /// <summary>Dat font for <see cref="ValueLabel"/>.</summary>
+    public UiDatFont? ValueFont { get; set; }
+
+    /// <summary>Color for <see cref="ValueLabel"/> (default white).</summary>
+    public Vector4 ValueColor { get; set; } = Vector4.One;
+
+    /// <summary>Authored rectangle for <see cref="ValueLabel"/>, LOCAL to
+    /// this button — the lifted value child's own rect
+    /// (<see cref="Layout.DatWidgetFactory.BuildButton"/> sets this). Null
+    /// (no value child found) means <see cref="ValueLabel"/> is never set
+    /// either, so this is never read in that case.</summary>
+    public (float X, float Y, float Width, float Height)? ValueBox { get; set; }
+
+    /// <summary>Horizontal alignment of <see cref="ValueLabel"/> within
+    /// <see cref="ValueBox"/> — the lifted child's own authored justify.</summary>
+    public LabelAlignment ValueAlign { get; set; } = LabelAlignment.Center;
+
     /// <summary>Label horizontal alignment options.</summary>
     public enum LabelAlignment { Center, Left }
 
@@ -453,6 +490,19 @@ public sealed class UiButton : UiElement, IUiGlobalTimeListener, IUiDatStateful
             ctx.DrawStringDat(lf, label, tx, ty, LabelColor, Outline, OutlineColor);
         }
 
+        if (ValueLabel is { Length: > 0 } value && ValueFont is { } vf)
+        {
+            float boxX = ValueBox?.X ?? 0f;
+            float boxY = ValueBox?.Y ?? 0f;
+            float boxWidth = ValueBox?.Width ?? Width;
+            float boxHeight = ValueBox?.Height ?? Height;
+            float vx = ValueAlign == LabelAlignment.Left
+                ? boxX + LabelOffsetX
+                : boxX + (boxWidth - vf.MeasureWidth(value)) * 0.5f;
+            float vy = boxY + (boxHeight - vf.LineHeight) * 0.5f;
+            ctx.DrawStringDat(vf, value, vx, vy, ValueColor, Outline, OutlineColor);
+        }
+
         uint dragSprite = _itemDragAcceptance switch
         {
             ItemDragAcceptance.Accept => ItemDragAcceptSprite,