fix: 装备属性面板避让逻辑 + 多项功能更新

- item_tooltip_view.gd: 新增 avoid_rect 属性，tooltip 与装备窗口重叠时自动推到左侧
- inventory_ui.gd: 悬停装备时传入窗口矩形作为避让区域
- 包含其他累积的功能开发和测试文件

project/ui/shop_ui.gd

@@ -177,9 +177,10 @@ func sell(inv_cell: int, count: int = -1) -> void:
 	_request_sell(payload, amount)
 
 func _drop_to_sell(payload: Dictionary) -> bool:
-	if _mode != 2 and not (item_mouse and item_mouse.has_method("is_attached") and item_mouse.is_attached()):
-		# 在购买模式下若直接拖拽道具到商店窗口，同样允许触发卖出
-		pass
+	# uishop.py only exposes the sell target after switching to sell mode. A
+	# drag during buy mode must be rejected without sending CG_SHOP SELL/SELL2.
+	if _mode != 2:
+		return false
 	if payload.is_empty() or int(payload.get("window", -1)) != 1:
 		return false
 	var cell := int(payload.get("cell", -1))
@@ -419,9 +420,9 @@ func _slot(it: Dictionary, pos: int) -> Button:
 			slot.add_child(count_lbl)
 
 		if _tooltip_builder:
-			var pd: Dictionary = proto.item(vnum) if proto and proto.has_method("item") else {}
-			slot.tooltip_text = _tooltip_builder.format(vnum, maxi(1, count), pd, it)
-			slot.tooltip_text += "\n价格：%d" % int(it.get("price", 0))
+			# The shared ItemTooltipView is the only item-attribute panel owner.
+			# Keeping a native Control tooltip here creates a second popup on hover.
+			slot.tooltip_text = ""
 
 		slot.mouse_entered.connect(func(): _show_slot_tooltip(vnum, maxi(1, count), it))
 		slot.mouse_exited.connect(func(): _hide_slot_tooltip())