iter34 卡④ T1-T3: 信息迷雾类型可见性——层距 N＋Boss/候选豁免＋单圈回雾（N 读表）＋呈现显隐决策面＋画布大图断言与探针常数同源

- level_table.gd: info_visible_layers 字段（int≥1）＋validate 越域 domain 错；level.tres 挂 2
- level_runner.gd: type_visible_ids() 纯函数（入口 BFS 层差 ≤N ∪ Boss ∪ 候选，锚=当前节点层/入口停点 0；visited 不豁免）＋_bfs_layers()
- level_map_screen.gd: node_display() 静态决策面＋display_probe()＋_draw_graph 图标/文字/Boss 描边三处改读决策面（结构通道零改动）
- 新单测 level_map_type_vis_test（26 断言）／level_map_info_fog_test（19 断言）；run_all 注册两行
- smoke_all ⑬ 真图 L2 入口停点可见性组（+5 断言）；ui_input_probe ⑬ 常数锚同源化＋⑱ 雾不扩可点域

轻闸读数：冒烟 1211 项 0 失败（主区基线 1206，+5＝新增组）／probe_gate --click 全绿

game/data/schemas/level_table.gd

@@ -5,6 +5,7 @@ class_name LevelTable
 extends Resource
 
 @export var rows: Array[Dictionary] = []   # Array[Dictionary]
+@export var info_visible_layers: int = 2   # 信息迷雾可见层数 N（int ≥1；类型仅在邻近 N 层内可见——关卡节点地图 v2.1）
 
 const NODE_TYPES := ["battle", "reward", "rest", "boss", "shop"]   # 五类（关卡节点地图 v1.1）
 
@@ -19,6 +20,8 @@ func row_by_level_index(level_index: int) -> Dictionary:
 
 func validate() -> Array:
 	var errs: Array[Dictionary] = []
+	if info_visible_layers < 1:
+		errs.append({"category": "domain", "message": "info_visible_layers 越域 int≥1: %d" % info_visible_layers})
 	if rows.is_empty():
 		errs.append({"category": "empty_table", "message": "LevelTable 为空"})
 		return errs

game/data/tables/level.tres

@@ -4,6 +4,7 @@
 
 [resource]
 script = ExtResource("1")
+info_visible_layers = 2
 rows = [
 {"level_index": 1, "display_name": "第一层 · 地精洞窟", "rest_heal_pct": 30, "templates": [{"display_name": "地精洞窟·主线洞道（现行）", "nodes": [{"node_depth": 0, "type": "battle"}, {"node_depth": 1, "type": "battle"}, {"node_depth": 2, "type": "battle"}, {"node_depth": 3, "type": "battle"}, {"type": "reward"}, {"type": "rest"}, {"node_depth": 4, "type": "boss"}]}, {"display_name": "地精洞窟·先赏后整", "nodes": [{"node_depth": 0, "type": "battle"}, {"node_depth": 1, "type": "battle"}, {"node_depth": 2, "type": "battle"}, {"type": "reward"}, {"type": "rest"}, {"node_depth": 3, "type": "battle"}, {"node_depth": 4, "type": "boss"}]}, {"display_name": "地精洞窟·先整后赏", "nodes": [{"node_depth": 0, "type": "battle"}, {"node_depth": 1, "type": "battle"}, {"node_depth": 2, "type": "battle"}, {"type": "rest"}, {"type": "reward"}, {"node_depth": 3, "type": "battle"}, {"node_depth": 4, "type": "boss"}]}, {"display_name": "地精洞窟·赏战整", "nodes": [{"node_depth": 0, "type": "battle"}, {"node_depth": 1, "type": "battle"}, {"node_depth": 2, "type": "battle"}, {"type": "reward"}, {"node_depth": 3, "type": "battle"}, {"type": "rest"}, {"node_depth": 4, "type": "boss"}]}, {"display_name": "地精洞窟·整战赏", "nodes": [{"node_depth": 0, "type": "battle"}, {"node_depth": 1, "type": "battle"}, {"node_depth": 2, "type": "battle"}, {"type": "rest"}, {"node_depth": 3, "type": "battle"}, {"type": "reward"}, {"node_depth": 4, "type": "boss"}]}]},
 {"level_index": 2, "display_name": "第二层 · 幽暗地域", "rest_heal_pct": 30, "templates": [{"display_name": "宽廊双干（现行）", "nodes": [{"node_depth": 0, "type": "battle", "next": [1, 2]}, {"node_depth": 1, "type": "battle", "next": [3, 4]}, {"node_depth": 2, "type": "reward", "next": [5, 6]}, {"node_depth": 3, "type": "rest", "next": [7]}, {"node_depth": 4, "type": "battle", "next": [7]}, {"node_depth": 5, "type": "battle", "next": [7]}, {"node_depth": 6, "type": "battle", "next": [7]}, {"node_depth": 7, "type": "battle", "next": [8]}, {"node_depth": 8, "type": "shop", "next": [9]}, {"node_depth": 9, "type": "boss", "next": []}]}, {"display_name": "三干中廊", "nodes": [{"node_depth": 0, "type": "battle", "next": [1, 2]}, {"node_depth": 1, "type": "battle", "next": [3, 5]}, {"node_depth": 2, "type": "reward", "next": [4, 5]}, {"node_depth": 3, "type": "rest", "next": [6]}, {"node_depth": 4, "type": "battle", "next": [6, 7]}, {"node_depth": 5, "type": "battle", "next": [7]}, {"node_depth": 6, "type": "battle", "next": [8]}, {"node_depth": 7, "type": "battle", "next": [8]}, {"node_depth": 8, "type": "shop", "next": [9]}, {"node_depth": 9, "type": "boss", "next": []}]}, {"display_name": "宽廊斜岔", "nodes": [{"node_depth": 0, "type": "battle", "next": [1, 2]}, {"node_depth": 1, "type": "battle", "next": [3, 5]}, {"node_depth": 2, "type": "reward", "next": [4, 6]}, {"node_depth": 3, "type": "rest", "next": [7]}, {"node_depth": 4, "type": "battle", "next": [7]}, {"node_depth": 5, "type": "battle", "next": [7]}, {"node_depth": 6, "type": "battle", "next": [7]}, {"node_depth": 7, "type": "battle", "next": [8]}, {"node_depth": 8, "type": "shop", "next": [9]}, {"node_depth": 9, "type": "boss", "next": []}]}, {"display_name": "三干宽门", "nodes": [{"node_depth": 0, "type": "battle", "next": [1, 2]}, {"node_depth": 1, "type": "battle", "next": [3, 4]}, {"node_depth": 2, "type": "reward", "next": [4, 5]}, {"node_depth": 3, "type": "rest", "next": [6, 7]}, {"node_depth": 4, "type": "battle", "next": [7]}, {"node_depth": 5, "type": "battle", "next": [7]}, {"node_depth": 6, "type": "battle", "next": [8]}, {"node_depth": 7, "type": "battle", "next": [8]}, {"node_depth": 8, "type": "shop", "next": [9]}, {"node_depth": 9, "type": "boss", "next": []}]}, {"display_name": "窄廊短支", "nodes": [{"node_depth": 0, "type": "battle", "next": [1, 2]}, {"node_depth": 1, "type": "battle", "next": [3, 4]}, {"node_depth": 2, "type": "reward", "next": [5]}, {"node_depth": 3, "type": "rest", "next": [5, 6]}, {"node_depth": 4, "type": "battle", "next": [6]}, {"node_depth": 5, "type": "battle", "next": [7]}, {"node_depth": 6, "type": "battle", "next": [7]}, {"node_depth": 7, "type": "battle", "next": [8]}, {"node_depth": 8, "type": "shop", "next": [9]}, {"node_depth": 9, "type": "boss", "next": []}]}]},