merge: 关卡画面深层节点不可点根修——画布随图自适应+图上命中真实输入回归闸(用户目检 bug 反馈)

game/presentation/views/route_overlay.gd

@@ -46,6 +46,7 @@ var _attr_value: Label
 var _bonus_row: HBoxContainer
 var _bonus_value: Label
 var _cand_ids: Array = []            # 本停点候选 id 集（图上命中合法集）
+var _content_size := Vector2(620, 240)  # 图内容包络（open_choices 按图拟合——画布 min 尺寸随它）
 var _hover_id := -1                  # 悬停预承诺候选（-1 = 无）
 var abandon_btn: Button              # 放弃入口（可见性归组合根 set_abandon_available——只在冒险模式开）
 var _abandon_armed := false          # 二次确认态（首击置位、二击提交、超时/重开回落）
@@ -209,10 +210,31 @@ func open_choices(cands: Array, runner) -> void:
 	_cand_ids = []
 	for cand in cands:
 		_cand_ids.append(_id_of(cand))
+	_fit_canvas(_runner.nodes())
 	_refresh_status()
 	visible = true
 
 
+# 画布随图自适应（level-map.md Layout：画布宽随层数、高随同层最大节点数——公式与 _layout 同源；
+# 2026-09-28 真鼠标点击 bug 根修：固定 620×240 画布下深层节点（L1 Boss 内容 x=802）落在 gui_input
+# 命中区外——绘制无裁剪看得见、命中收不到事件。单链关卡层深=节点序，必须先拟合再命中。
+func _fit_canvas(nodes: Array) -> void:
+	if nodes.is_empty():
+		return
+	var layer := {}
+	var slot := {}
+	_assign_layers(nodes, layer, slot)
+	var maxl := 0
+	var maxslot := 0
+	for k in layer.keys():
+		maxl = maxi(maxl, int(layer[k]))
+	for k in slot.keys():
+		maxslot = maxi(maxslot, int(slot[k]))
+	_content_size = Vector2(70 + maxl * 122 + NODE_HALF.x + 8.0, 52 + maxslot * 58 + NODE_HALF.y + 8.0)
+	_content_size = _content_size.max(Vector2(620, 240))   # 下限 = 旧定值画布（小图观感不变）
+	_canvas.custom_minimum_size = _content_size
+
+
 # 状态栏刷新（命令式纪律——组合根打开本屏/兑付确认回执后重查；零推送信号订阅）
 func _refresh_status() -> void:
 	if _runner == null:
@@ -249,13 +271,13 @@ func _on_canvas_input(ev: InputEvent) -> void:
 	if _runner == null or not visible:
 		return
 	if ev is InputEventMouseMotion:
-		var nid := _candidate_at(_canvas.get_local_mouse_position())
+		var nid := _candidate_at(ev.position)   # gui_input 事件坐标 = 接收控件局部坐标（push_input 同成立）
 		if nid != _hover_id:
 			_hover_id = nid
 			_canvas.mouse_default_cursor_shape = Control.CURSOR_POINTING_HAND if nid >= 0 else Control.CURSOR_ARROW
 			_canvas.queue_redraw()
 	elif ev is InputEventMouseButton and ev.button_index == MOUSE_BUTTON_LEFT and ev.pressed:
-		var nid2 := _candidate_at(_canvas.get_local_mouse_position())
+		var nid2 := _candidate_at(ev.position)
 		if nid2 >= 0:
 			_submit_choice(nid2)
 
@@ -349,9 +371,18 @@ func _draw_graph(canvas: Control) -> void:
 
 
 func _layout(nodes: Array, canvas: Control) -> Dictionary:
-	# 分层：layer = 入口 BFS 深度；同层 slot 垂直排布
 	var layer := {}
 	var slot := {}
+	_assign_layers(nodes, layer, slot)
+	var pos := {}
+	var origin := (canvas.size - _content_size) / 2.0
+	for node in nodes:
+		pos[node] = origin + Vector2(70 + int(layer[node]) * 122, 52 + int(slot[node]) * 58)
+	return pos
+
+
+# 分层（layout/fit 共享件）：layer = 入口 BFS 深度；同层 slot 垂直排布；未达节点兜底排末层
+func _assign_layers(nodes: Array, layer: Dictionary, slot: Dictionary) -> void:
 	var layer_counts := {}
 	var entry := _entry(nodes)
 	var queue: Array = []
@@ -369,7 +400,6 @@ func _layout(nodes: Array, canvas: Control) -> Dictionary:
 				continue
 			layer[target] = l + 1
 			queue.append(target)
-	# 未达节点（理论不可达——校验已拦）兜底排末层
 	var max_layer := 0
 	for k in layer.keys():
 		max_layer = maxi(max_layer, int(layer[k]))
@@ -378,11 +408,6 @@ func _layout(nodes: Array, canvas: Control) -> Dictionary:
 			layer[node] = max_layer + 1
 			slot[node] = int(layer_counts.get(layer[node], 0))
 			layer_counts[layer[node]] = int(layer_counts.get(layer[node], 0)) + 1
-	var pos := {}
-	var origin := (canvas.size - Vector2(620, 240)) / 2.0
-	for node in nodes:
-		pos[node] = origin + Vector2(70 + int(layer[node]) * 122, 52 + int(slot[node]) * 58)
-	return pos
 
 
 func _entry(nodes: Array) -> Dictionary: