test(迭代35卡①): 合流图夹具改按契约 2 语义重写（合法合流＝第二入口直插主链取长路值＋声明深度虚高必拒）——使深度赋值判据可被变异拦下；代拍板追认单落 reports/

game/tests/unit/core/node_map_generator_test.gd

@@ -340,15 +340,26 @@ func _test_negative_fixtures() -> void:
 		{"id": 1, "type": "battle", "depth": 1, "next": []}])
 	Kit.check("非 Boss 终点夹具命中「终点（无出边）非 Boss」判据〔fv1〕",
 		_has_msg(_gen.validate_output(noBoss), "终点（无出边）非 Boss"))
-	# 合流图深度赋值语义（契约 2）：跳边让某节点的最长路径值高于其声明值 → 必须被拒
-	var conf_short := _fx([
-		{"id": 0, "type": "battle", "depth": 0, "next": [1, 3]},
+	# 合流图深度赋值语义（契约 2「自入口最长路径步数」）：
+	# (a) 合法合流——第二入口直插主链中段，该节点深度必须取长路值而非短路值
+	var conf_legal := _fx([
+		{"id": 0, "type": "battle", "depth": 0, "next": [1]},
 		{"id": 1, "type": "battle", "depth": 1, "next": [2]},
-		{"id": 2, "type": "reward", "depth": 2, "next": [3]},
-		{"id": 3, "type": "shop", "depth": 1, "next": [4]},
-		{"id": 4, "type": "boss", "depth": 4, "next": []}])
-	Kit.check("合流图深度写 shortest（=1）被拒（须最长路径步数）〔fv1〕",
-		_has_msg(_gen.validate_output(conf_short), "自入口最长路径步数"))
+		{"id": 2, "type": "battle", "depth": 2, "next": [3]},
+		{"id": 3, "type": "shop", "depth": 3, "next": [4]},
+		{"id": 4, "type": "boss", "depth": 4, "next": []},
+		{"id": 5, "type": "battle", "depth": 0, "next": [3]}])
+	Kit.check("合法合流图（第二入口直插主链，深度取最长路 3）自证零错误〔fv1〕",
+		_gen.validate_output(conf_legal).is_empty())
+	# (b) 声明深度高于真实最长路值 → 必被拒（前进方向不破，专测深度判据）
+	var conf_high := _fx([
+		{"id": 0, "type": "battle", "depth": 0, "next": [1]},
+		{"id": 1, "type": "battle", "depth": 1, "next": [2]},
+		{"id": 2, "type": "battle", "depth": 2, "next": [3]},
+		{"id": 3, "type": "shop", "depth": 4, "next": [4]},
+		{"id": 4, "type": "boss", "depth": 5, "next": []}])
+	Kit.check("声明深度高于最长路径步数被拒（深度=自入口最长路径步数）〔fv1〕",
+		_has_msg(_gen.validate_output(conf_high), "自入口最长路径步数"))
 	# 环/回边：深度不前进
 	var loop := _fx([
 		{"id": 0, "type": "battle", "depth": 0, "next": [1]},