fix: restore legacy playout parity and live startup

src/MBN_STOCK_WEBVIEW.LegacyApplication/LegacyOperatorController.cs

@@ -4631,8 +4631,10 @@ public sealed class LegacyOperatorController
                 out var fixedSelection,
                 out _)
             ? fixedSelection
-            : TryCreateNamedStockDetailSelection(selection, out var stockDetailSelection)
-                ? stockDetailSelection
+            : TryCreateNamedStockCandleSelection(selection, out var stockCandleSelection)
+                ? stockCandleSelection
+                : TryCreateNamedStockDetailSelection(selection, out var stockDetailSelection)
+                    ? stockDetailSelection
                 : TryCreateNamedLegacyIndustryFixedSelection(
                     selection,
                     out var legacyIndustryFixedSelection)
@@ -5165,6 +5167,35 @@ public sealed class LegacyOperatorController
         label.Contains("코스닥", StringComparison.Ordinal) ? "코스닥" :
         "전체";
 
+    private static bool TryCreateNamedStockCandleSelection(
+        LegacyNamedPlaylistSelectionView selection,
+        out CoreSceneSelection normalized)
+    {
+        normalized = null!;
+        try
+        {
+            LegacyComparisonValueGuard.RequireText(
+                selection.Subject,
+                200,
+                nameof(selection.Subject));
+            LegacyComparisonValueGuard.RequireStockCode(
+                selection.DataCode,
+                nameof(selection.DataCode));
+        }
+        catch (ArgumentException)
+        {
+            return false;
+        }
+
+        return LegacyStockCutCatalog.TryCreateDomesticStockCandleSelection(
+            selection.GroupCode,
+            selection.Subject,
+            selection.GraphicType,
+            selection.Subtype,
+            selection.DataCode,
+            out normalized);
+    }
+
     private static bool TryCreateNamedStockDetailSelection(
         LegacyNamedPlaylistSelectionView selection,
         out CoreSceneSelection normalized)