feat(卡② T3): 7 施加点 ctx 化 + dig_combo 死路删除 + run_ledger 搬运链方法删除

- action_economy/damage_controller/reward_economy: dispatch 加 _ctx、写口改 EffectEngine.counter_add/counter(_ctx,...)
- battle_orchestrator: _fx_emit→dispatch(counters_ctx)、counter_spend 静态化、删 counters_seed 回灌与 counters_export 战末导出、_feat_yield_adjust 删 dig_combo 死读数与 combo_cap 第五参（零行为差）
- grant_segment: counter 读/value_counter/per ctx 化、_apply_counter_hit 写口静态化、combo_cap 收集删除
- run_ledger: 删 counters_seed_snapshot/counters_merge_export + 头注/字段注改 ctx 直写口径
数据行 domain/reset_at 删除与 feats.tres id 改名见 T6；核心层调用面已对齐新 API。

game/core/damage_controller.gd

@@ -77,7 +77,7 @@ func set_fx(fx: EffectEngine, ctx: EffectContext) -> void:
 func _fx_hits(event: String, payload: Dictionary) -> Array:
 	if _fx == null:
 		return []
-	return _fx.dispatch(event, payload, _fx_fact)
+	return _fx.dispatch(_ctx, event, payload, _fx_fact)
 
 
 # 事件发射薄面（免施加观测位——enemy_hp_threshold 等现无订阅者的事件保留零扰动面）
@@ -344,13 +344,13 @@ func _hero_attack_base_value(t: Dictionary, ctx: Dictionary) -> float:
 		if String(h.get("kind", "")) == "attack_bonus":
 			var contrib := int(h.get("value", 0)) * _per_value(String(h.get("per", "")), ac_payload)
 			if h.has("value_counter") and String(h.get("value_counter", "")) != "":
-				contrib = _fx.counter(String(h.get("value_counter", "")))
+				contrib = EffectEngine.counter(_ctx, String(h.get("value_counter", "")))
 			base_value += float(contrib)
 	# 计数器施加（attack_commit 命中行内 counter_add〔用后清零行〕，命中序=声明序）
 	for h in ac_hits:
 		if String(h.get("kind", "")) == "counter_add":
 			var set_v = h.get("set", null)
-			_fx.counter_add(String(h.get("counter_id", "")), int(h.get("value", 0)) if set_v == null else int(set_v), set_v != null)
+			EffectEngine.counter_add(_ctx, String(h.get("counter_id", "")), int(h.get("value", 0)) if set_v == null else int(set_v), set_v != null)
 	# 任意真族：厚积薄发满层 spike 倍乘（≥3 层——强制必中已在折扣拍承载）
 	if ctx["spike_ready"]:
 		for h in ac_hits:
@@ -463,7 +463,7 @@ func _resolve_enemy_skill(t: Dictionary) -> void:
 					fx_ac_request.call(h)   # 石肤 AC 累积归编排器单点（set_hero_ac_override 消费面）
 			"counter_add":
 				var set_v = h.get("set", null)
-				_fx.counter_add(String(h.get("counter_id", "")), int(h.get("value", 0)) if set_v == null else int(set_v), set_v != null)
+				EffectEngine.counter_add(_ctx, String(h.get("counter_id", "")), int(h.get("value", 0)) if set_v == null else int(set_v), set_v != null)
 	if shield > 0:
 		total = maxi(int(db.settlement.damage_floor), total - shield)
 	units.apply_damage(hero, total)