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/wardrobe_transmog_system.gd

@@ -0,0 +1,146 @@
+# wardrobe_transmog_system.gd —— Metin2 40250 装备外观幻化重塑与试衣间系统 1:1
+# 对照 40250 服务端 item_transmutation.cpp, char_item.cpp
+class_name WardrobeTransmogSystem
+extends RefCounted
+
+signal item_transmuted(target_slot: int, target_name: String, new_look_vnum: int, new_look_name: String)
+signal transmutation_reverted(target_slot: int, item_name: String)
+
+const VNUM_TRANSMOG_SCROLL   := 72301 # 幻化秘籍
+const VNUM_REVERT_SCROLL     := 72302 # 幻化还原秘籍
+const TRANSMOG_COST_GOLD     := 10000000 # 1000 万金币
+
+# 装备大类
+const TYPE_WEAPON  := 1
+const TYPE_ARMOR   := 2
+const TYPE_COSTUME := 28
+
+# 试衣间预览外观效果 (不消耗物品)
+func preview_transmog(target_item: Dictionary, skin_item: Dictionary) -> Dictionary:
+	var val = _validate_compatibility(target_item, skin_item)
+	if not val["ok"]:
+		return val
+
+	return {
+		"ok": true,
+		"base_vnum": target_item.get("vnum", 0),
+		"base_name": target_item.get("name", "神装"),
+		"preview_vnum": skin_item.get("vnum", 0),
+		"preview_name": skin_item.get("name", "幻化外观"),
+		"msg": "试衣间预览生成完毕！"
+	}
+
+# 执行幻化外观重塑
+func apply_transmutation(scroll_slot: int, target_slot: int, skin_slot: int, inventory: Array, player_data: Dictionary) -> Dictionary:
+	if scroll_slot < 0 or scroll_slot >= inventory.size() or inventory[scroll_slot] == null:
+		return {"ok": false, "reason": "INVALID_SCROLL_SLOT"}
+	if target_slot < 0 or target_slot >= inventory.size() or inventory[target_slot] == null:
+		return {"ok": false, "reason": "INVALID_TARGET_SLOT"}
+	if skin_slot < 0 or skin_slot >= inventory.size() or inventory[skin_slot] == null:
+		return {"ok": false, "reason": "INVALID_SKIN_SLOT"}
+
+	if target_slot == skin_slot:
+		return {"ok": false, "reason": "SAME_SLOT", "msg": "目标装备与外观装备不能为同一格子！"}
+
+	var scroll = inventory[scroll_slot]
+	if int(scroll.get("vnum", 0)) != VNUM_TRANSMOG_SCROLL:
+		return {"ok": false, "reason": "NOT_A_TRANSMOG_SCROLL", "msg": "需要使用【幻化秘籍】(72301)！"}
+
+	var target = inventory[target_slot]
+	var skin = inventory[skin_slot]
+
+	var comp_check = _validate_compatibility(target, skin)
+	if not comp_check["ok"]:
+		return comp_check
+
+	var gold = int(player_data.get("gold", 0))
+	if gold < TRANSMOG_COST_GOLD:
+		return {"ok": false, "reason": "NOT_ENOUGH_GOLD", "msg": "幻化所需金币不足！需要 10,000,000 金币。"}
+
+	# 扣除金币与卷轴
+	player_data["gold"] = gold - TRANSMOG_COST_GOLD
+	var sc_cnt = int(scroll.get("count", 1))
+	if sc_cnt > 1:
+		scroll["count"] = sc_cnt - 1
+	else:
+		inventory[scroll_slot] = null
+
+	# 消耗外观材料装备
+	var skin_vnum = int(skin.get("vnum", 0))
+	var skin_name = skin.get("name", "外观")
+	var sk_cnt = int(skin.get("count", 1))
+	if sk_cnt > 1:
+		skin["count"] = sk_cnt - 1
+	else:
+		inventory[skin_slot] = null
+
+	# 赋予目标装备幻化外观 (所有基础属性、强化与灵石 100% 保留)
+	target["transmog_vnum"] = skin_vnum
+	target["transmog_name"] = skin_name
+
+	var tname: String = target.get("name", "装备")
+	item_transmuted.emit(target_slot, tname, skin_vnum, skin_name)
+
+	return {
+		"ok": true,
+		"target_slot": target_slot,
+		"target_name": tname,
+		"transmog_vnum": skin_vnum,
+		"transmog_name": skin_name,
+		"msg": "幻化成功！【%s】披上了【%s】的华丽外观！" % [tname, skin_name]
+	}
+
+# 还原装备原生外观
+func revert_transmutation(scroll_slot: int, target_slot: int, inventory: Array) -> Dictionary:
+	if scroll_slot < 0 or scroll_slot >= inventory.size() or inventory[scroll_slot] == null:
+		return {"ok": false, "reason": "INVALID_SCROLL_SLOT"}
+	if target_slot < 0 or target_slot >= inventory.size() or inventory[target_slot] == null:
+		return {"ok": false, "reason": "INVALID_TARGET_SLOT"}
+
+	var scroll = inventory[scroll_slot]
+	if int(scroll.get("vnum", 0)) != VNUM_REVERT_SCROLL:
+		return {"ok": false, "reason": "NOT_A_REVERT_SCROLL", "msg": "需要使用【幻化还原秘籍】(72302)！"}
+
+	var target = inventory[target_slot]
+	if not target.has("transmog_vnum") or int(target.get("transmog_vnum", 0)) == 0:
+		return {"ok": false, "reason": "NOT_TRANSMUTED", "msg": "该装备未曾幻化，无需还原！"}
+
+	# 消耗还原卷轴
+	var cnt = int(scroll.get("count", 1))
+	if cnt > 1:
+		scroll["count"] = cnt - 1
+	else:
+		inventory[scroll_slot] = null
+
+	target.erase("transmog_vnum")
+	target.erase("transmog_name")
+
+	var tname: String = target.get("name", "装备")
+	transmutation_reverted.emit(target_slot, tname)
+
+	return {
+		"ok": true,
+		"target_slot": target_slot,
+		"item_name": tname,
+		"msg": "幻化已抹除！【%s】恢复为原生经典外观。" % tname
+	}
+
+# 校验外观类型兼容性
+func _validate_compatibility(target: Dictionary, skin: Dictionary) -> Dictionary:
+	if target.is_empty() or skin.is_empty():
+		return {"ok": false, "reason": "EMPTY_DATA"}
+
+	var t_type = int(target.get("type", 1))
+	var s_type = int(skin.get("type", 1))
+
+	# 武器只能幻化武器或时装武器外观；防具只能幻化防具或时装衣服
+	if t_type == TYPE_WEAPON:
+		if s_type != TYPE_WEAPON and s_type != TYPE_COSTUME:
+			return {"ok": false, "reason": "TYPE_MISMATCH", "msg": "武器只能幻化武器或时装外观！"}
+	elif t_type == TYPE_ARMOR:
+		if s_type != TYPE_ARMOR and s_type != TYPE_COSTUME:
+			return {"ok": false, "reason": "TYPE_MISMATCH", "msg": "防具衣服只能幻化衣服防具外观！"}
+	else:
+		return {"ok": false, "reason": "UNSUPPORTED_TYPE", "msg": "该装备部位暂不支持幻化外观。"}
+
+	return {"ok": true}