feat(ui): #409 — client-wide retail tooltip system

Full re-derivation from named-retail decomp: UIElement::StartTooltipAtMouse
@0x00460D70 -> UIElementManager::StartTooltip @0x0045DE90/@0x00459700,
UIElement::MouseHover @0x00462520 (P0x4B TooltipOn gate + global
m_tooltipEnable), UIElementManager::CheckTooltip @0x0045B6E0 (dwell/
auto-hide timer, default 0.25s/10s), SwitchMouseOver/DeletingElement
(dismissal). Corrects the earlier GF-16 investigation: P0x47 is the
element-desc id WITHIN the popup LayoutDesc (P0x48), not a "behavior
enum"; P0x4A is read off the popup's own instantiated root, not the
trigger element.

- ElementInfo/UiElement gain six tooltip data fields (P0x47/48/49/4A/4B/50),
  read generically by ElementReader and copied through LayoutImporter,
  mirroring the existing AuthoredInvisible passthrough pattern.
- UiRoot's existing CheckTooltip-derived hover timer gains TooltipShow/
  TooltipHide events, a per-element P0x50 delay override, and dismissal
  wiring at every retail-confirmed teardown site.
- RetailTooltipPresenter (owned by RetailUiRuntime, mounted alongside
  RetailDialogFactory) builds the popup via the existing LayoutImporter
  dat-lock seam, auto-resizes by the measured-vs-authored text delta
  (word-wrapped via the existing UiText.WrapWords primitive), positions
  at the mouse clamped to the display, and stays topmost over dialogs via
  its own later per-tick BringToFront (register AD-106).
- Misc.TooltipEnable/Misc.TooltipDelay are client-local UserPreferences
  (retail's own 2013 Config tab authors no visible row for either) —
  SettingsStore gains a MiscSettings section, no new options-panel row.
- Live-DAT sweep: 434 elements author >=1 trigger property (243 with
  literal text this port shows; 191 rely on retail's dynamic
  InqProperty(0x49) override, deferred as register TS-85 alongside the
  unmodeled P0x3D wrap-width override).

Gates: Release build 0 errors; App suite (live-DAT env) 5410/5407 passed/
3 skipped (was 5379/3); Runtime 1735/0 unchanged; UI.Abstractions 926/0;
full solution 14,617/14,548 passed/69 skipped/0 failed.

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

src/AcDream.App/UI/Layout/DatWidgetFactory.cs

@@ -1183,4 +1183,21 @@ public static class DatWidgetFactory
     /// </summary>
     private static string? NormalizeEscapes(string? raw) =>
         raw?.Replace("\\n", "\n").Replace("\r", string.Empty);
+
+    /// <summary>
+    /// #409 (client-wide retail tooltip system): resolves the already-
+    /// extracted <see cref="ElementInfo.TooltipText"/> (dat property
+    /// <c>0x49</c>) through <paramref name="stringResolve"/>, applying the
+    /// SAME escape normalization every other authored <c>StringInfo</c>
+    /// (captions, <c>0x17</c>) gets at this one choke point. Null when the
+    /// element authors no tooltip text or no resolver is available.
+    /// </summary>
+    internal static string? ResolveTooltipText(
+        ElementInfo info,
+        Func<UiStringInfoValue, string?>? stringResolve)
+    {
+        if (stringResolve is null || info.TooltipText is not { } tooltipText)
+            return null;
+        return NormalizeEscapes(stringResolve(tooltipText));
+    }
 }