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/motion_event_fly_test.gd

@@ -0,0 +1,97 @@
+# motion_event_fly_test —— 40250 local MotionEventType=6 parity。
+# `.msa` FLY 帧必须按 FlyFileName 创建本地弹道；CG_SHOOT 仍由 GameScene
+# 单独发送，服务器 GC_CREATE_FLY 不应被拿来替代这条本地视觉路径。
+extends SceneTree
+
+const AssetRoot = preload("res://asset_root.gd")
+const FlyObject = preload("res://fly_object.gd")
+const NetWorld = preload("res://net_world.gd")
+const GameScene = preload("res://game_scene.gd")
+
+class Client extends Node:
+	var shots: Array[int] = []
+	func get_main_vid() -> int:
+		return 1
+	func shoot(skill: int) -> bool:
+		shots.append(skill)
+		return true
+
+var failures := 0
+
+func check(ok: bool, label: String) -> void:
+	if not ok:
+		failures += 1
+		printerr("FAIL: " + label)
+
+func _init() -> void:
+	call_deferred("run")
+
+func run() -> void:
+	await process_frame
+	var mount := Node3D.new()
+	get_root().add_child(mount)
+	var world := NetWorld.new()
+	get_root().add_child(world)
+	world.parent = mount
+	world._assets_root = AssetRoot.path()
+	var manager := FlyObject.new()
+	manager.manual_step = true
+	get_root().add_child(manager)
+	manager.setup(mount, null, AssetRoot.path())
+	world._fly_mgr = manager
+
+	var actor := Node3D.new()
+	actor.position = Vector3(0, 1, 0)
+	get_root().add_child(actor)
+	var target := Node3D.new()
+	target.position = Vector3(0, 1, -8)
+	get_root().add_child(target)
+	var event := {
+		"type": 6,
+		"fly_file": "d:/ymir work/pc/assassin/effect/arrow_01_fast.msf",
+		"fly_pos": Vector3.ZERO,
+		"fly_bone": "",
+		"fly_attaching": false,
+	}
+	check(world.spawn_motion_fly(actor, event, target, 7),
+			"valid FlyFileName creates the local motion projectile")
+	check(manager.active_count() == 1, "local motion projectile enters FlyManager once")
+	if manager.active_count() == 1:
+		var before: Vector3 = manager._instances[0].pos
+		manager.step(0.01)
+		check(manager._instances[0].pos != before, "local motion projectile advances")
+	var missing := event.duplicate()
+	missing.fly_file = "d:/ymir work/pc/assassin/effect/missing.msf"
+	check(not world.spawn_motion_fly(actor, missing, target),
+			"missing FlyFileName follows reference create failure")
+	check(manager.active_count() == 1, "missing fly resource does not add a duplicate instance")
+
+	# GameScene keeps the two 40250 side effects separate: one local visual
+	# instance plus one queued CG_SHOOT at the same motion frame.
+	manager.clear_for_map_change()
+	var game := GameScene.new()
+	var client := Client.new()
+	get_root().add_child(game)
+	get_root().add_child(client)
+	game.client = client
+	game.net_world = world
+	game.player = actor
+	game._mount = mount
+	game._motion_effect_target = weakref(target)
+	game._queue_shot(7)
+	game._on_local_motion_event_detailed(event)
+	check(client.shots == [7], "FLY event still sends exactly one queued CG_SHOOT")
+	check(manager.active_count() == 1, "FLY event creates exactly one local projectile")
+	game.free()
+	client.free()
+
+	manager.clear_for_map_change()
+	manager.free()
+	actor.free()
+	target.free()
+	world.free()
+	mount.free()
+	await process_frame
+	if failures == 0:
+		print("PASS: motion_event_fly_test")
+	quit(1 if failures else 0)