MC-1 商店独立刷新机制（UI落码第三波收官核心批）——level_runner新增shop_refresh/free_left/cost三面(GP扣费+货架整架重抽shop_draw同签+付费计数进离清零)+adventure_table三旋钮(免费0/基价20/曲线1.8 provisional)+shop_overlay刷新钮转正(set_refresh_display投喂面)+presenter on_shop_refresh+main接线+冒烟5断言(752/0)+关卡节点地图v1.6换代+冒险结构v0.15回写。机制=P-C2+Q2裁(基础免费0/天赋增益位预留/GP ceil(20×1.8^n)/池源同源)。闸=冒烟752/0+probe_gate全绿+layout 0

game/presentation/views/shop_overlay_view.gd

@@ -18,7 +18,8 @@ const ATTR_LABELS := {"atk": "攻击", "max_hp": "生命上限", "armor_class":
 const KIND_LABELS := {"attack": "攻击", "max_hp": "生命上限", "armor": "护甲", "ap": "行动点"}   # 货架件值文案轴（共享池 kind 词表——迭代 11 第②批）
 
 var _gp_label: Label
-var _refresh_btn: Button   # M6 刷新呈现位（禁用占位——机制由 MC-1 核心批接线）
+var _refresh_btn: Button   # M6 呈现位——MC-1 起由 set_refresh_display 投喂启用
+signal refresh_requested   # MC-1：刷新意图（pool 面；组合根接 presenter.on_shop_refresh）
 var _cards_box: VBoxContainer
 var _card_rows: Array[Dictionary] = []   # [{product_id, price, bought, btn}]——refresh_state 就地重刷（零重建回流）
 var _shelf_rows: Array[Dictionary] = []  # [{kind_id, btn}]——pool 面卡片（买后整架重建=重抽反馈）
@@ -40,8 +41,8 @@ func _init() -> void:
 	_refresh_btn = UiKit.button("")
 	_refresh_btn.icon = UiKit.load_tex(UiKit.TEX_ICON_REFRESH)
 	_refresh_btn.custom_minimum_size = Vector2(44, 44)
-	_refresh_btn.tooltip_text = "刷新货架（机制接入中——商店刷新核心批 MC-1）"
-	_refresh_btn.disabled = true
+	_refresh_btn.disabled = true   # MC-1 投喂后启用（set_refresh_display）
+	_refresh_btn.pressed.connect(_emit_refresh_requested)
 	top.add_child(_refresh_btn)
 	var stock_badge := UiKit.label("0", 12, true, UiKit.INK_ON_GOLD)
 	stock_badge.mouse_filter = Control.MOUSE_FILTER_IGNORE
@@ -154,6 +155,21 @@ func refresh_shelf_state(gp: int) -> void:
 	for card in _shelf_rows:
 		card.btn.disabled = gp < int(card.price)
 		card.card.modulate = Color(1, 1, 1, 1) if gp >= int(card.price) else Color(1, 1, 1, 0.55)
+		if _refresh_btn != null and not _refresh_btn.disabled:
+			_refresh_btn.disabled = gp < _refresh_gp_cost
+
+
+# MC-1 刷新呈现投喂（free_left=天赋位免费剩余[基础 0]/gp_cost=本次 GP 刷新价/can_afford=余额可付）
+var _refresh_gp_cost := 0
+
+
+func set_refresh_display(free_left: int, gp_cost: int, can_afford: bool) -> void:
+	_refresh_gp_cost = gp_cost
+	for lab in _refresh_btn.get_children():
+		if lab is Label:
+			(lab as Label).text = str(free_left)
+	_refresh_btn.tooltip_text = "刷新货架——换一批商品\n免费 %d 次（天赋增益位，基础 0）\nGP 刷新 %d 金币（provisional）\n池源=共享池，与奖励三选一同源" % [free_left, gp_cost]
+	_refresh_btn.disabled = not can_afford and free_left <= 0
 
 
 # 货架卡（bcard 竖卡：类型色带+图标+名+件值描述+价签+购买钮——M6 同构卡；demo ⑤）
@@ -181,3 +197,7 @@ func _build_shelf_card(holder: Control, c: Dictionary) -> Dictionary:
 
 func _emit_shelf_buy(kind: String) -> void:
 	buy_requested.emit(kind)
+
+
+func _emit_refresh_requested() -> void:
+	refresh_requested.emit()