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/fly_reset_test.gd

@@ -0,0 +1,50 @@
+# fly_reset_test —— Loading/map change must remove active projectiles and flashes.
+#   godot --headless --path project --script fly_reset_test.gd
+extends SceneTree
+
+const FlyObject = preload("res://fly_object.gd")
+
+var _fail := 0
+
+func _ck(condition: bool, message: String) -> void:
+	if not condition:
+		_fail += 1
+		printerr("FAIL: " + message)
+
+func _init() -> void:
+	await _run()
+	if _fail == 0:
+		print("PASS: fly_reset_test")
+		quit(0)
+	else:
+		printerr("%d check(s) failed" % _fail)
+		quit(1)
+
+func _run() -> void:
+	var host := Node3D.new()
+	var manager := FlyObject.new()
+	get_root().add_child(host)
+	get_root().add_child(manager)
+	manager.manual_step = true
+	manager.setup(host)
+
+	var data := FlyObject.FlyData.new()
+	data.init_vel = 1.0
+	data.flat_range = 10.0
+	manager.spawn(Vector3.ZERO, Vector3(0.0, 0.0, -1.0), true, data)
+	manager._spawn_flash(Vector3.ZERO, FlyObject.FLY_EXP)
+	_ck(manager.active_count() == 1, "active projectile is tracked before reset")
+	_ck(host.get_child_count() == 2, "projectile and flash visuals exist before reset")
+
+	manager.clear_for_map_change()
+	_ck(manager.active_count() == 0, "reset removes all active projectiles")
+	await process_frame
+	_ck(host.get_child_count() == 0, "reset removes projectile and flash visuals")
+
+	# clear_for_map_change already removed all visuals.  At this point the
+	# short-lived regression owns empty manager nodes, so destroy them
+	# synchronously like CFlyingManager::DeleteAllInstances/Destroy instead of
+	# queueing a free immediately before SceneTree.quit().
+	host.free()
+	manager.free()
+	await process_frame