feat(D.5.1): persist PlayerDescription shortcuts (were parsed then discarded)

Add optional `onShortcuts` callback to `GameEventWiring.WireAll`; invoke
it with `parsed.Shortcuts` after the inventory/equipped loops in the
PlayerDescription handler.  `GameWindow` holds the list in a new
`Shortcuts` property (initialized to empty) so the toolbar (D.5.1 Task 5)
can read hotbar slots without keeping a parser reference.  Existing callers
compile unchanged — the parameter defaults to null.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

tests/AcDream.Core.Net.Tests/GameEventWiringTests.cs

@@ -375,4 +375,73 @@ public sealed class GameEventWiringTests
         Assert.NotNull(items.GetItem(0x50000A02u));
     }
 
+    [Fact]
+    public void WireAll_PlayerDescription_invokesOnShortcuts()
+    {
+        // D.5.1 Task 4: WireAll must forward parsed.Shortcuts to the onShortcuts
+        // callback so the toolbar can read them without keeping a parser reference.
+        // Mirrors PlayerDescription_RegistersInventoryEntries_InItemRepository
+        // for the harness pattern; adds the Shortcut flag (0x1) + one 12-byte
+        // entry, followed by the legacy-hotbar count (0) + spellbook_filters (0)
+        // then empty inventory and equipped.
+        IReadOnlyList<PlayerDescriptionParser.ShortcutEntry>? got = null;
+
+        var dispatcher = new GameEventDispatcher();
+        var items      = new ItemRepository();
+        var combat     = new CombatState();
+        var spellbook  = new Spellbook();
+        var chat       = new ChatLog();
+        GameEventWiring.WireAll(dispatcher, items, combat, spellbook, chat,
+            onShortcuts: list => got = list);
+
+        // PlayerDescription body — minimal: no property flags, ATTRIBUTE|ENCHANTMENT
+        // vectorFlags (so the parser sees has_health=1, attribute_flags=0,
+        // enchantment_mask=0 and advances past both vector blocks), then the trailer
+        // with option_flags=Shortcut (0x1).
+        //
+        // Trailer layout when option_flags=0x1 (Shortcut only, no SpellLists8):
+        //   u32 option_flags = 0x1
+        //   u32 options1     = 0
+        //   u32 count        = 1     ← shortcut block (Shortcut flag set)
+        //   u32 idx          = 0
+        //   u32 guid         = 0x5001
+        //   u16 spellId      = 0
+        //   u16 layer        = 0
+        //   u32 legacyHotbar count = 0   ← SpellLists8 NOT set → legacy fallback
+        //   u32 spellbook_filters  = 0
+        //   u32 inventory count    = 0
+        //   u32 equipped count     = 0
+        var sb = new MemoryStream();
+        using var w = new BinaryWriter(sb);
+        w.Write(0u);     // propertyFlags = 0
+        w.Write(0x52u);  // weenieType
+        w.Write(0x201u); // vectorFlags = ATTRIBUTE | ENCHANTMENT
+        w.Write(1u);     // has_health
+        w.Write(0u);     // attribute_flags = 0 (no attrs)
+        w.Write(0u);     // enchantment_mask = 0
+
+        // Trailer
+        w.Write(0x00000001u); // option_flags = Shortcut
+        w.Write(0u);          // options1
+        // Shortcut block (option_flags & 0x1 set):
+        w.Write(1u);          // count = 1
+        w.Write(0u);          // idx = 0
+        w.Write(0x5001u);     // guid = 0x5001
+        w.Write((ushort)0);   // spellId = 0
+        w.Write((ushort)0);   // layer = 0
+        // SpellLists8 NOT set → legacy single-list fallback:
+        w.Write(0u);          // legacy hotbar list count = 0
+        // No DesiredComps, no CharacterOptions2, no GameplayOptions → strict path:
+        w.Write(0u);          // spellbook_filters = 0
+        w.Write(0u);          // inventory count = 0
+        w.Write(0u);          // equipped count = 0
+
+        var env = GameEventEnvelope.TryParse(WrapEnvelope(GameEventType.PlayerDescription, sb.ToArray()));
+        dispatcher.Dispatch(env!.Value);
+
+        Assert.NotNull(got);
+        Assert.Single(got!);
+        Assert.Equal(0x5001u, got![0].ObjectGuid);
+    }
+
 }