fix(chargen): Campaign CC gate round 1 Batch E — text origin, caption escapes, value rects, scrollbars, name prefill

R2-1/R2-6 (description-box text clipped left of the frame, regressed from
Batch C's frame un-consume): root cause was never the un-consume change
itself — the Heritage/Profession/Town/Summary description boxes
(0x100003C4/0x100003E0/0x10000409/0x10000404) all author retail's four
independent text-inset margins (dat properties 0x23-0x26,
UIElement_Text::OnSetAttribute cases 0xf-0x12: margL=9/margR=26/margU=15/
margD=15), which this codebase never read at all, before or after Batch C.
Un-consuming the gold-frame children just made the pre-existing missing-
margin bug visible for the first time (the frame's own left border now
draws around the same x=0 origin text always used). Fixed end to end:
ElementInfo.MarginLeft/Right/Top/Bottom (read in
ApplyCanonicalLegacyProjection, propagated in Merge), UiText.MarginLeft/
Right/Top/Bottom (additive with the pre-existing Padding), a new pure
UiText.ContentOffsetX static consumed by the multi-line draw path's
per-line placement, and matching wrap-width shrinkage in
DatRichText.Compose and BuildText's own authored-multiline path. Scoped to
the multi-line (non-OneLine) path only.

R2-2/R2-3 (Attribute\n Credits renders the literal backslash-n; the live
credit value overlaps mid-caption): two stacked gaps. (1) UiButton
captions never escape-normalized the DAT's literal "\n" — centralized the
normalize into DatWidgetFactory's ResolveAuthoredString (the one choke
point every P0x17 resolution already shares) plus a NormalizeEscapes
helper for the per-state caption loop, so every caller normalizes
identically. (2) UiButton.Label only ever drew one line — retail's
UIElement_Button IS a UIElement_Text with OneLine=false on these buttons,
so a caption should word-wrap/stack like any other Type-12 box. Added
UiButton.DrawBlockLabel + the pure, unit-tested WrapBlockLines. The
value-overlap itself: ValueBox was never wrong (live-DAT-measured correct
child rects) — the caption was drawing unconfined across the button's
full width ("Available Skill Credits" measures 193px in a 231px button
whose value box starts at x=116). Fixed by confining the caption's own
drawable width to stop before ValueBox.X whenever a ValueLabel coexists.

R2-7a (Summary overview listbox missing its scrollbar): pure wiring gap —
the listbox authors a linked scrollbar via dat property 0x72
(ScrollbarElementId=0x10000401) that CharacterCreationSummaryPage's
constructor never resolved, unlike every other UiTemplateListBox owner in
the codebase. Fixed with the same resolve-and-wire pattern.

R2-7b (how-to box scrollbar overlaps text, no thumb): traced to a
downstream symptom of R2-1, not an independent bug — UiScrollbar only
paints its thumb when the linked model has overflow, and the pre-fix wrap
width (un-inset) produced fewer/shorter lines than fit the view. Pinned
directly against the real installed strings/font (Aluvian's how-to text)
that the margin-correct width overflows. No UiScrollbar code changed.

R2-8 (name field should show "[ Name ]"): re-checked the one hypothesis
Batch A's GF-15 closure left open — an authored initial-text string on
the field's own P0x17. Confirmed absent on every state in the installed
DAT. No code change; Batch A's closure stands, now pinned as a live-DAT
regression test.

App suite 5334/3 (was 5321/3, +13, zero regressions). Runtime 1735/0
unchanged. Full solution Release build green.

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

tests/AcDream.App.Tests/UI/UiTextTests.cs

@@ -278,6 +278,69 @@ public class UiTextTests
         Assert.Equal(9f, y);
     }
 
+    /// <summary>
+    /// R2-1 (Campaign CC gate round 1 Batch E): with zero margins,
+    /// ContentOffsetX is byte-identical to the pre-fix bare-Padding math —
+    /// every existing DAT-imported multi-line box (margins default 0 unless
+    /// DatWidgetFactory seeds them) is unaffected by this change.
+    /// </summary>
+    [Fact]
+    public void ContentOffsetX_ZeroMargins_MatchesBarePaddingMath()
+    {
+        float left = UiText.ContentOffsetX(
+            elementWidth: 200f, padding: 4f, marginLeft: 0f, marginRight: 0f,
+            lineWidth: 30f, centered: false, rightAligned: false);
+        Assert.Equal(4f, left);
+
+        float centered = UiText.ContentOffsetX(
+            elementWidth: 200f, padding: 4f, marginLeft: 0f, marginRight: 0f,
+            lineWidth: 30f, centered: true, rightAligned: false);
+        Assert.Equal(Math.Max(4f, (200f - 30f) * 0.5f), centered);
+
+        float right = UiText.ContentOffsetX(
+            elementWidth: 200f, padding: 4f, marginLeft: 0f, marginRight: 0f,
+            lineWidth: 30f, centered: false, rightAligned: true);
+        Assert.Equal(200f - 4f - 30f, right);
+    }
+
+    /// <summary>
+    /// The exact live-DAT shape (Campaign CC gate round 1 Batch E, R2-1):
+    /// Heritage/Profession/Town/Summary description boxes author
+    /// margL=9/margR=26 — a left-justified line must start at x=9 (Padding
+    /// 0 + MarginLeft 9), not x=0. This is the regression: pre-fix, every
+    /// one of these boxes drew its first glyph at x=0, clipping under the
+    /// authored gold-frame's left border piece.
+    /// </summary>
+    [Fact]
+    public void ContentOffsetX_LeftJustified_HonorsAuthoredMarginLeft()
+    {
+        float x = UiText.ContentOffsetX(
+            elementWidth: 265f, padding: 0f, marginLeft: 9f, marginRight: 26f,
+            lineWidth: 100f, centered: false, rightAligned: false);
+        Assert.Equal(9f, x);
+    }
+
+    /// <summary>
+    /// A right-aligned line must stop before MarginRight, not at the raw
+    /// element edge — the R2-1 fix's other half (the wrap width shrinks by
+    /// the same inset so text no longer overflows the visible right edge
+    /// either).
+    /// </summary>
+    [Fact]
+    public void ContentOffsetX_RightAligned_HonorsAuthoredMarginRight()
+    {
+        float x = UiText.ContentOffsetX(
+            elementWidth: 265f, padding: 0f, marginLeft: 9f, marginRight: 26f,
+            lineWidth: 50f, centered: false, rightAligned: false);
+        _ = x; // left case covered above
+
+        float right = UiText.ContentOffsetX(
+            elementWidth: 265f, padding: 0f, marginLeft: 9f, marginRight: 26f,
+            lineWidth: 50f, centered: false, rightAligned: true);
+        // contentRight = 265 - 0 - 26 = 239; right-aligned x = 239 - 50 = 189.
+        Assert.Equal(189f, right);
+    }
+
     [Fact]
     public void LineIntersectsViewport_PartialLineRemainsDrawable()
     {