feat(client): 完成40250客户端核心功能1:1对齐与桥梁高度采样修复

- 桥梁与静态物体高度采样修复：
  - 严格对齐 40250 CMapOutdoor::GetHeight 与 CAttributeInstance::GetHeight
  - 解析 .mdatr 中的 AttributeHeight 网格，使用 is_in_triangle_2d 准确计算桥面多边形平面方程
  - sample_height 查询邻近区块并返回 fMAX(fObjectHeight, fTerrainHeight)，彻底解决走上桥面穿透掉入水底/河床的问题
  - 新增 test_bridge_height_parity.gd 自动化对拍测试
- 40250 怪物击杀经验动效：
  - 1:1 实现 FLY_EXP(0) / FLY_HP / FLY_SP 粒子轨迹与爆炸吸附
- 40250 客户端全系统功能对齐（Batches 1-31）：
  - 包含公会、交易、骑乘、变身、钓鱼、采矿、商城、信件、结婚、地牢等 134 套对拍系统与自动化回归测试
- 文档沉淀：
  - 新增 docs/CLIENT-PARITY-AUDIT-AND-FIX-GUIDE.md 客户端对拍缺陷发现与修复工程指南

project/ui/game_option_ui.gd

@@ -49,7 +49,7 @@ const LABELS := {
 	"pvp_mode": "PK 模式", "block": "屏蔽", "chat": "聊天显示",
 	"always_show_name": "总显示名字", "effect_on_off": "伤害数字", "salestext_on_off": "叫卖文字",
 	"name_color_normal": "普通", "name_color_empire": "阵营",
-	"target_board_no_view": "不看他国", "target_board_view": "看他国",
+	"target_board_no_view": "关", "target_board_view": "开",
 	"pvp_peace": "和平", "pvp_revenge": "反击", "pvp_guild": "帮会", "pvp_free": "自由",
 	"block_exchange_button": "交易", "block_party_button": "组队", "block_guild_button": "帮会",
 	"block_whisper_button": "密语", "block_friend_button": "好友", "block_party_request_button": "组队申请",
@@ -99,6 +99,11 @@ func setup(ui_manager: CanvasLayer, m2client: Node, assets := "") -> void:
 	_block_mode = int(_cfg.get_value("gameopt", "block_mode", 0))
 	if client and client.has_signal("block_mode_changed"):
 		client.block_mode_changed.connect(_on_server_block_mode)
+	if ui and ui.has_signal("window_closed"):
+		ui.window_closed.connect(func(w):
+			if not _win.is_empty() and _win.get("root") == w:
+				_win = {}
+		)
 
 func is_open() -> bool:
 	if _mobile_mode:
@@ -127,9 +132,10 @@ func close() -> void:
 			ui.close(_mobile_root)
 		_mobile_root = null
 		return
-	if is_open():
-		ui.close(_win["root"])
+	var r: Control = _win.get("root", null)
 	_win = {}
+	if r and is_instance_valid(r) and ui:
+		ui.close(r)
 
 func open() -> void:
 	if _mobile_mode:
@@ -141,13 +147,35 @@ func open() -> void:
 	if not FileAccess.file_exists(path):
 		push_warning("GameOptionUI: no gameoptiondialog.py at " + path)
 		return
-	_win = ui.open_script(path, assets_root)
+	_win = ui.open_script(path, assets_root, false, true)
 	if not is_open():
 		return
+	set_center_position()
 	_relabel()
 	_wire()
 	_sync()
 
+## 1:1 对齐 40250 uigameoption.py: self.SetCenterPosition()
+func set_center_position(offset := Vector2.ZERO) -> void:
+	var r: Control = _win.get("root", null)
+	if r == null or not is_instance_valid(r):
+		return
+	if ui and ui.has_method("center_window"):
+		ui.center_window(r, offset)
+	else:
+		var vp_sz := Vector2(1920, 1080)
+		var vp := r.get_viewport()
+		if vp:
+			var vrect := vp.get_visible_rect().size
+			if vrect.x > 300 and vrect.y > 300:
+				vp_sz = vrect
+		elif ui and "screen" in ui and ui.screen.x > 0:
+			vp_sz = Vector2(ui.screen)
+		var sz := r.size
+		if sz.x <= 0 or sz.y <= 0:
+			sz = r.custom_minimum_size
+		r.position = ((vp_sz - sz) / 2.0 + offset).round()
+
 func _open_mobile() -> void:
 	if is_open():
 		return