feat(卡② T5): 计数器引用闭合校验 + V9 负面套件 + manifest 登记

- config_db_cross_validator ⑦ 引用闭合：声明集=feats+treasure 各行 do.counter_id，
  读点（when counter id / value_counter / counter_spend counter_id）无同名写入行→加载致命
  （判据只做成员判定，不重写前缀规则——契约 6 两落点同源）
- 新建 counter_prefix_fatal_test.gd（expect1/negative）：①meta_ 非法前缀②悬空读点两断言，均正确拒绝
- run_all.gd manifest 登记负面套件
real 数据 config_db_test 26 全绿（闭合零误伤）；insurance_used 经 forgive_seal_miss 行 do.counter_id 声明纳入。

game/core/config_db_cross_validator.gd

@@ -109,6 +109,40 @@ func cross_validate(loaded: Dictionary, push_diag: Callable) -> void:
 			if quota < 1:
 				push_diag.call("error", "shelf_zero_quota", "ShopTable.pool_shelf kind %s 令牌配额为 0（牌库空种入货架 = 库存无锚）" % kind)
 
+	# ⑦ 计数器引用闭合（卡② V9——读点 id 必命中同名写入行，否则加载致命）：
+	# 声明集 = feats + treasure 各行 triggers 内 kind=counter_add 的 do.counter_id；
+	# 读点 = when fact=counter 的 id、do.value_counter、kind=counter_spend 的 counter_id。
+	var feats_tab = loaded.get("feats")
+	var trig_rows: Array = []
+	if feats_tab != null:
+		for r in feats_tab.rows:
+			trig_rows.append(r)
+	if treasure_tab != null:
+		for r in treasure_tab.rows:
+			trig_rows.append(r)
+	var counter_decls := {}
+	for row in trig_rows:
+		for tr_v in (row.get("triggers", []) as Array):
+			var dd: Dictionary = (tr_v as Dictionary).get("do", {}) as Dictionary
+			# 声明集＝任一 do.counter_id 行（counter_add 直写、forgive_seal_miss 经 _apply_counter_hit 写——皆写入行）
+			if dd.has("counter_id"):
+				counter_decls[String(dd.counter_id)] = true
+	for row in trig_rows:
+		var rid := String(row.get("feat_id", row.get("item_id", "")))
+		for tr_v in (row.get("triggers", []) as Array):
+			var tr: Dictionary = tr_v as Dictionary
+			for c_v in (tr.get("when", []) as Array):
+				var c: Dictionary = c_v as Dictionary
+				if String(c.get("fact", "")) == "counter" and c.has("id"):
+					var rd := String(c.id)
+					if not counter_decls.has(rd):
+						push_diag.call("error", "counter_dangling_ref", "%s when counter 读点无同名写入行: %s（引用闭合）" % [rid, rd])
+			var do2: Dictionary = tr.get("do", {}) as Dictionary
+			if do2.has("value_counter") and not counter_decls.has(String(do2.value_counter)):
+				push_diag.call("error", "counter_dangling_ref", "%s value_counter 读点无同名写入行: %s" % [rid, String(do2.value_counter)])
+			if String(do2.get("kind", "")) == "counter_spend" and do2.has("counter_id") and not counter_decls.has(String(do2.counter_id)):
+				push_diag.call("error", "counter_dangling_ref", "%s counter_spend 无同名写入行: %s" % [rid, String(do2.counter_id)])
+
 
 # 池模板 × 技能行跨表校验（加载期致命；返回错误列表——ConfigDB 诊断通道与冒烟直验共用）：
 # skill_id 悬空致命 + 池构成纪律（每池恰一行普攻、增益技 ≤1、妨害技 ≤1——proposal §2.1 结构保证 +