Pre-query action bar item information to avoid placeholder display

When items are placed on the action bar, pre-fetch their ItemDef information
so the action bar displays the item name instead of a generic "Item" placeholder.
This ensures item names are available when the action bar is rendered, consistent
with the fix applied to quest reward items display.

Calls queryItemInfo() when an item is assigned to an action bar slot.

src/game/game_handler.cpp

@@ -13912,6 +13912,10 @@ void GameHandler::setActionBarSlot(int slot, ActionBarSlot::Type type, uint32_t
     if (slot < 0 || slot >= ACTION_BAR_SLOTS) return;
     actionBar[slot].type = type;
     actionBar[slot].id = id;
+    // Pre-query item information so action bar displays item name instead of "Item" placeholder
+    if (type == ActionBarSlot::ITEM && id != 0) {
+        queryItemInfo(id, 0);
+    }
     saveCharacterConfig();
 }