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/inventory_ui_test.gd

@@ -7,6 +7,7 @@ const InventoryUI = preload("res://ui/inventory_ui.gd")
 
 class FakeClient extends Node:
 	signal inventory_changed(window: int, cell: int)
+	signal item_highlighted(window: int, cell: int)
 	var inv := {}          # cell -> {vnum,count}
 	var equip := []        # 11 x {vnum,count}
 	var used := []
@@ -78,7 +79,9 @@ func _run() -> void:
 	# 填充
 	var c5: Panel = iv._cells[5]
 	_ck(int(c5.get_meta("vnum", 0)) == 19, "cell 5 filled vnum 19")
-	_ck(c5.tooltip_text.contains("物品19"), "cell 5 tooltip has locale name")
+	_ck(c5.tooltip_text.is_empty(), "inventory item has no native duplicate tooltip panel")
+	_ck(String(c5.get_meta("tooltip_body", "")).contains("物品19"),
+		"inventory item keeps tooltip body for the single custom panel/mobile detail")
 	var c6: Panel = iv._cells[6]
 	_ck(c6.has_node("count") and (c6.get_node("count") as Label).text == "3", "cell 6 shows count 3")
 	_ck(int(iv._cells[91].get_meta("vnum", 0)) == 11209, "equip wear1 -> ui cell 91 filled")
@@ -87,6 +90,9 @@ func _run() -> void:
 	fc.set_inv(8, 100, 1)
 	await process_frame
 	_ck(int(iv._cells[8].get_meta("vnum", 0)) == 100, "cell 8 filled after inventory_changed")
+	fc.item_highlighted.emit(1, 5)
+	await process_frame
+	_ck(bool(c5.get_meta("highlighted", false)), "GC_ITEM_SET2 highlight reaches the matching UI slot")
 
 	# 右键用
 	iv.use(5)