feat(ui): world-object hover tooltip — UIElement_SmartBoxWrapper::RecvNotice_SmartBoxObjectFound port

NOT the UI-element dwell-timer path. Retail's mechanism is
UIElement_SmartBoxWrapper::RecvNotice_SmartBoxObjectFound @0x004E5AD0,
fed every frame by FindObject @0x004E5430/Global_Loop @0x004E5620
using the current mouse position regardless of input focus. It fires
IMMEDIATELY (no dwell wait) on the found-object id CHANGING, gated by
the PlayerModule::ShowTooltips character option (already modeled in
CharacterOptionTable, default true), with text
ACCWeenieObject::GetObjectName(id, NAME_APPROPRIATE, 0) — the SAME
name call as item tooltips, but WITHOUT the item-cell's separate
stack-count prefix (a ground pile of arrows shows "Arrows", not
"20 Arrows" — a real, decomp-confirmed asymmetry).

Ported as RetailTooltipPresenter.UpdateWorldHoverTooltip, driven by
the SAME world-hover pick CursorFeedbackController's own found-cursor
already uses (WorldSelectionQuery.PickAtCursor, includeSelf: true —
own player is included on that precedent) and the SAME
ClientObjectTable-backed name resolver SocialAllegiancePageController's
ResolveWorldObjectName already established as this codebase's
pattern. New WorldTooltipRuntimeBindings threads it through
RetailUiRuntimeBindings; wired at InteractionRetainedUiComposition
alongside the existing cursorFeedback construction.

Queried only when no UI element is hovered — a narrowing from
retail's literal "raycast even under non-item UI chrome" (FindObject's
m_pElementLastOver check), called out in the class's own doc note as
a scoped interpretation rather than a byte-exact port.

The exact popup skin is an inference, not a measured value: an
exhaustive live-DAT sweep found UIElement_SmartBoxWrapper (class
0x10000030) has NO authored ElementDesc anywhere installed — unlike
every other tooltip trigger, it is evidently constructed directly by
gmGamePlayUI's own mode setup, not from a walkable LayoutDesc. This
port reuses the same P0x47=0x10000395/P0x48=0x21000041 pair every
other game-code SetTooltip caller in this family resolves to — the
best-evidenced choice, called out in register row TS-85 rather than
silently assumed exact.

Live-verified against a connected ACE session (session-config launch,
+Acdream): hovering a "Silver Tusker" near spawn mounted the correct
popup text and simultaneously flipped the cursor to its DefaultFound
variant, confirming the shared found-object pipeline drives both.

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

src/AcDream.App/UI/RetailUiRuntime.cs

@@ -333,6 +333,17 @@ public sealed record RetailUiCursorBindings(
     CursorFeedbackController Feedback,
     RetailCursorManager Manager);
 
+/// <summary>
+/// #409 follow-on (docs/ISSUES.md "Item 2"): world-object hover tooltip
+/// bindings for <see cref="RetailTooltipPresenter"/>'s world-hover half — see
+/// that class's own doc note on <c>UIElement_SmartBoxWrapper::
+/// RecvNotice_SmartBoxObjectFound @0x004E5AD0</c>.
+/// </summary>
+public sealed record WorldTooltipRuntimeBindings(
+    Func<uint?> HoverGuidAtCursor,
+    Func<uint, string?> ResolveName,
+    Func<bool> Enabled);
+
 public sealed record ConfirmationRuntimeBindings(
     Action<uint, uint, bool> SendResponse);
 
@@ -435,6 +446,7 @@ public sealed record RetailUiRuntimeBindings(
     ExternalContainerRuntimeBindings ExternalContainer,
     VendorRuntimeBindings Vendor,
     RetailUiCursorBindings Cursor,
+    WorldTooltipRuntimeBindings WorldTooltip,
     ConfirmationRuntimeBindings Confirmations,
     AppraisalRuntimeBindings Appraisal,
     OptionsRuntimeBindings Options,
@@ -3366,7 +3378,15 @@ public sealed class RetailUiRuntime : IDisposable
             }
         }
 
-        TooltipPresenter = new RetailTooltipPresenter(Host.Root, CreateTooltipLayout);
+        TooltipPresenter = new RetailTooltipPresenter(Host.Root, CreateTooltipLayout)
+        {
+            // #409 follow-on ("Item 2"): the world-object hover half —
+            // see RetailTooltipPresenter's own doc note on
+            // UIElement_SmartBoxWrapper::RecvNotice_SmartBoxObjectFound.
+            WorldHoverGuidProvider = () => _bindings.WorldTooltip.HoverGuidAtCursor(),
+            WorldHoverNameResolver = _bindings.WorldTooltip.ResolveName,
+            WorldTooltipsEnabled = () => _bindings.WorldTooltip.Enabled(),
+        };
 
         if (_bindings.Chat.Store is { } store)
         {