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/pk_penalty_system.gd

@@ -0,0 +1,158 @@
+# pk_penalty_system.gd —— Metin2 40250 恶名红名掉落惩罚与露西之戒保护 1:1
+# 对照 40250 服务端 char_battle.cpp, char.cpp, Item 70043, 70102, 70048
+class_name PkPenaltySystem
+extends RefCounted
+
+signal lucy_ring_protected()
+signal item_dropped_on_death(item: Dictionary)
+signal alignment_restored(new_alignment: int)
+
+const MIN_PENALTY_LEVEL := 50
+const ITEM_LUCY_RING := 70043       # 露西之戒
+const ITEM_ZEN_BEAN := 70102        # 禅豆 (+500 善恶值洗恶名)
+const ITEM_CLOAK_OF_PEACE := 70048  # 和平披风 (隐匿红名)
+
+# 负善恶值掉落几率表 (40250 char_battle.cpp 1:1)
+static func get_death_drop_chance(alignment: int) -> float:
+	if alignment >= 0:
+		return 0.0
+	elif alignment >= -3999: # 凶恶
+		return 0.05
+	elif alignment >= -7999: # 歹毒
+		return 0.10
+	elif alignment >= -11999: # 恶贯满盈
+		return 0.15
+	else: # <= -12000 嗜血魔王
+		return 0.25
+
+# 死亡掉落综合判定
+func process_death_penalty(
+	player_level: int,
+	alignment: int,
+	equipment: Dictionary,
+	inventory: Array,
+	forced_roll: float = -1.0
+) -> Dictionary:
+	# 1. 50 级以下或非红名(>=0) 免除一切死亡掉落
+	if player_level < MIN_PENALTY_LEVEL or alignment >= 0:
+		return {
+			"dropped": false,
+			"reason": "SAFE_LEVEL_OR_POSITIVE_KARMA",
+			"msg": "受新手保护或和平声望庇佑，免于死亡惩罚。"
+		}
+
+	# 2. 检查是否佩戴露西之戒 (70043)
+	var has_lucy_ring := false
+	var ring_slot_key = ""
+	for eq_key in equipment.keys():
+		var eq = equipment[eq_key]
+		if eq != null and int(eq.get("vnum", 0)) == ITEM_LUCY_RING:
+			has_lucy_ring = true
+			ring_slot_key = eq_key
+			break
+
+	if has_lucy_ring:
+		# 露西之戒替死碎裂，阻断掉落
+		equipment[ring_slot_key] = null
+		lucy_ring_protected.emit()
+		return {
+			"dropped": false,
+			"ring_shattered": true,
+			"msg": "【露西之戒】替你承受了死亡的厄运，戒指粉碎瓦解，身上物品完好无损！"
+		}
+
+	# 3. 计算掉落几率
+	var chance := get_death_drop_chance(alignment)
+	var roll := forced_roll if forced_roll >= 0.0 else randf()
+
+	if roll > chance:
+		return {
+			"dropped": false,
+			"reason": "LUCKY_ROLL",
+			"msg": "幸运未触发掉落惩罚。"
+		}
+
+	# 4. 寻找可掉落的物品 (已锁定的物品 is_locked 严禁掉落)
+	var droppable_candidates: Array = []
+
+	# 从未锁定装备中搜寻
+	for eq_key in equipment.keys():
+		var it = equipment[eq_key]
+		if it != null and not it.get("is_locked", false):
+			droppable_candidates.append({"type": "equip", "key": eq_key, "item": it})
+
+	# 从未锁定背包中搜寻
+	for i in range(inventory.size()):
+		var it = inventory[i]
+		if it != null and not it.get("is_locked", false):
+			droppable_candidates.append({"type": "inv", "slot": i, "item": it})
+
+	if droppable_candidates.is_empty():
+		return {
+			"dropped": false,
+			"reason": "ALL_ITEMS_PROTECTED",
+			"msg": "身上的所有贵重物品均处于安全加锁保护中，未发生掉落！"
+		}
+
+	# 掉落一件物品
+	var chosen = droppable_candidates[randi() % droppable_candidates.size()]
+	var dropped_item: Dictionary = chosen["item"].duplicate(true)
+
+	if chosen["type"] == "equip":
+		equipment[chosen["key"]] = null
+	else:
+		inventory[chosen["slot"]] = null
+
+	item_dropped_on_death.emit(dropped_item)
+
+	return {
+		"dropped": true,
+		"dropped_item": dropped_item,
+		"msg": "恶名昭彰！你被击杀，珍贵物品【%s】散落到了地面！" % dropped_item.get("name", "物品")
+	}
+
+# 使用禅豆 (70102) 消除 500 点恶名
+func use_zen_bean(
+	slot_idx: int,
+	inventory: Array,
+	current_alignment: int
+) -> Dictionary:
+	if slot_idx < 0 or slot_idx >= inventory.size():
+		return {"ok": false, "reason": "INVALID_SLOT"}
+
+	var it = inventory[slot_idx]
+	if it == null or int(it.get("vnum", 0)) != ITEM_ZEN_BEAN:
+		return {"ok": false, "reason": "NOT_ZEN_BEAN", "msg": "这不是禅豆！"}
+
+	if current_alignment >= 0:
+		return {
+			"ok": false,
+			"reason": "NOT_EVIL",
+			"msg": "你的名声本就光明清白，无需服用禅豆洗去恶名。"
+		}
+
+	# 消耗禅豆
+	var cnt: int = int(it.get("count", 1))
+	if cnt <= 1:
+		inventory[slot_idx] = null
+	else:
+		it["count"] = cnt - 1
+
+	# 回复 500 点善恶值 (上限为 0)
+	var new_alignment: int = mini(0, current_alignment + 500)
+	alignment_restored.emit(new_alignment)
+
+	return {
+		"ok": true,
+		"old_alignment": current_alignment,
+		"new_alignment": new_alignment,
+		"restored": 500,
+		"msg": "服用了禅豆，心灵得到了净化，恶名值减少了 500 点！"
+	}
+
+# 判定和平披风 (70048) 是否隐匿红名
+func is_red_name_hidden(equipment: Dictionary) -> bool:
+	for eq in equipment.values():
+		if eq != null and int(eq.get("vnum", 0)) == ITEM_CLOAK_OF_PEACE:
+			return true
+	return false