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/mobile_gesture_test.gd

@@ -11,6 +11,7 @@ const InventoryUI = preload("res://ui/inventory_ui.gd")
 const MouseController = preload("res://ui/mouse_controller.gd")
 
 class FakeClient extends Node:
+	signal quickslots_changed
 	var inventory := [{"cell": 5, "vnum": 19, "count": 2}]
 	var skills := [{"id": 1, "level": 5, "master": 0}, {"id": 16, "level": 3, "master": 0}]
 	var quickslots := []
@@ -28,12 +29,33 @@ class FakeClient extends Node:
 	func get_quickslots() -> Array: return quickslots
 	func use_skill(id: int, target: int) -> bool:
 		calls.append(["use_skill", id, target]); return true
-	func cast_skill(motion: int, heading: float, x: int, y: int) -> bool:
+	func cast_skill(motion: int, heading: float, x: int, y: int, _arg: int = 0) -> bool:
 		casts.append([motion, heading, x, y]); return true
 	func quickslot_add(pos: int, kind: int, ref: int) -> bool:
-		calls.append(["quickslot_add", pos, kind, ref]); return true
+		calls.append(["quickslot_add", pos, kind, ref])
+		quickslots = quickslots.filter(func(q): return int(q.get("pos", -1)) != pos)
+		quickslots.append({"pos": pos, "type": kind, "ref": ref})
+		quickslots_changed.emit()
+		return true
 	func quickslot_swap(a: int, b: int) -> bool:
-		calls.append(["quickslot_swap", a, b]); return true
+		calls.append(["quickslot_swap", a, b])
+		var ai := -1
+		var bi := -1
+		for i in quickslots.size():
+			if int(quickslots[i].get("pos", -1)) == a: ai = i
+			if int(quickslots[i].get("pos", -1)) == b: bi = i
+		if ai >= 0 and bi >= 0:
+			var tmp: Dictionary = quickslots[ai]
+			quickslots[ai] = quickslots[bi]
+			quickslots[bi] = tmp
+			quickslots[ai]["pos"] = a
+			quickslots[bi]["pos"] = b
+		elif ai >= 0:
+			quickslots[ai]["pos"] = b
+		elif bi >= 0:
+			quickslots[bi]["pos"] = a
+		quickslots_changed.emit()
+		return true
 	func use_item(window: int, cell: int) -> bool:
 		calls.append(["use_item", window, cell]); return true
 	func move_item(fw: int, fc: int, tw: int, tc: int, count: int) -> bool: