resolve alternative alias chain rule_code in DataManager

gframe/data_manager.cpp

@@ -85,6 +85,19 @@ bool DataManager::ReadDB(sqlite3* pDB) {
 		}
 	}
 	sqlite3_finalize(pStmt);
+	// Resolve one extra hop for alternative alias chains, mirroring get_original_code_rule logic:
+	// For A->B->C (all alternative), A.rule_code should be C, not B.
+	// Strictly one extra hop: look up the alias target's get_duel_code().
+	for (auto& entry : _datas) {
+		auto& cd = entry.second;
+		if (cd.rule_code != 0) continue;
+		if (!is_alternative(cd.code, cd.alias)) continue;
+		auto it = _datas.find(cd.alias);
+		if (it == _datas.end()) continue;
+		auto rule = it->second.get_duel_code();
+		if (rule != cd.alias)
+			cd.rule_code = rule;
+	}
 	for (const auto& entry : extra_setcode) {
 		const auto& code = entry.first;
 		const auto& list = entry.second;