iter16ui T5：P4乙panel切片8→16（PANEL_SLICE单点，button 8/仪式框12维持）+Q1丙panel_skinned工厂content margin clamp（低于切片自动抬平，9消费面7处受益调用点零改）+P5甲圆角收敛RADIUS_OBJECT=5单点（26处2/3/4/5/6/8档归一；例外17底座/200金印/100脉冲环保留）+bcard选中底字面量退役归PANEL_DATA+art-bible §7.1圆角单点与九宫格切片两条注记双侧落文；轻闸冒烟782/0+probe_gate --click全绿（click done=true 问题=0）

game/presentation/views/toast_stack.gd

@@ -35,7 +35,7 @@ func show_toast(text: String, tone: String = "info") -> void:
 	row.mouse_filter = Control.MOUSE_FILTER_IGNORE
 	row.clip_contents = true   # 缺陷①约束：固定槽高裁剪，不回流布局
 	row.custom_minimum_size = Vector2(0, 24)
-	var sb := UiKit.panel_flat(UiKit.TOAST_BG, COL_INFO, 2, 1, Vector4(8, 2, 8, 2))
+	var sb := UiKit.panel_flat(UiKit.TOAST_BG, COL_INFO,UiKit.RADIUS_OBJECT, 1, Vector4(8, 2, 8, 2))
 	var col := COL_INFO
 	if tone == "warn":
 		col = COL_WARN