전략 시간봉 오류 수정

backend/src/main/java/com/goldenchart/service/StrategyConditionTimeframeService.java

@@ -71,11 +71,21 @@ public class StrategyConditionTimeframeService {
 
     private void collectFromNode(JsonNode node, Set<String> out) {
         if (node == null || node.isNull()) return;
+        if (collectTimeframesFromNode(node, out)) return;
+        // TIMEFRAME 래핑 없는 레거시 트리 — 기본 1m
+        out.add("1m");
+    }
+
+    /**
+     * 트리에서 TIMEFRAME 노드를 수집. 발견 시 true.
+     */
+    private boolean collectTimeframesFromNode(JsonNode node, Set<String> out) {
+        if (node == null || node.isNull()) return false;
         String type = node.path("type").asText("");
 
         if ("TIMEFRAME".equals(type)) {
             out.add(LiveStrategyTimeframeService.normalize(node.path("candleType").asText("1m")));
-            return;
+            return true;
         }
 
         if ("AND".equals(type) || "OR".equals(type)) {
@@ -85,23 +95,22 @@ public class StrategyConditionTimeframeService {
                     for (JsonNode tf : children) {
                         out.add(LiveStrategyTimeframeService.normalize(tf.path("candleType").asText("1m")));
                     }
-                    return;
+                    return true;
                 }
+                boolean found = false;
                 for (JsonNode child : children) {
-                    collectFromNode(child, out);
+                    found |= collectTimeframesFromNode(child, out);
                 }
-                return;
+                return found;
             }
         }
 
         JsonNode child = node.path("child");
         if (!child.isMissingNode() && !child.isNull()) {
-            collectFromNode(child, out);
-            return;
+            return collectTimeframesFromNode(child, out);
         }
 
-        // 단일 START(기본 1m) 또는 TIMEFRAME 래핑 없는 트리
-        out.add("1m");
+        return false;
     }
 
     private static boolean allTimeframeChildren(JsonNode children) {