refactor(runtime): close canonical gameplay ownership

Unify the toolbar shortcut manager with Runtime inventory state, route retail-ordered shortcut and spellbook command effects through the canonical owners, and make retained controllers borrow those exact instances. Remove the item-interaction transaction fallback and add graphical/no-window parity plus failure-safe terminal ownership-ledger coverage.

Co-authored-by: Codex <codex@openai.com>

tests/AcDream.App.Tests/UI/Layout/SpellcastingUiControllerTests.cs

@@ -338,8 +338,12 @@ public sealed class SpellcastingUiControllerTests
             item => item.ObjectId,
             useItem,
             selection ?? new SelectionState(),
-            addFavorite ?? ((_, _, _) => { }),
-            (_, _) => { },
+            (tab, position, spellId) =>
+            {
+                spellbook.SetFavorite(tab, position, spellId);
+                addFavorite?.Invoke(tab, position, spellId);
+            },
+            (tab, spellId) => spellbook.RemoveFavorite(tab, spellId),
             shortcutDigits,
             emptySlotSprite,
             examineSpell);