feat: restore legacy drag events and Tornado launch integration

tests/MBN_STOCK_WEBVIEW.Core.Tests/LegacyThemeCatalogPersistenceServiceTests.cs

@@ -5,6 +5,40 @@ namespace MBN_STOCK_WEBVIEW.Core.Tests;
 
 public sealed class LegacyThemeCatalogPersistenceServiceTests
 {
+    [Theory]
+    [InlineData(ThemeMarket.Krx, DataSourceKind.Oracle, 0, false)]
+    [InlineData(ThemeMarket.Krx, DataSourceKind.Oracle, 2, true)]
+    [InlineData(ThemeMarket.Nxt, DataSourceKind.MariaDb, 0, false)]
+    [InlineData(ThemeMarket.Nxt, DataSourceKind.MariaDb, 2, true)]
+    public async Task ThemeNameExistsAsync_UsesOneParameterizedExactReadOnTheSelectedMarket(
+        ThemeMarket market,
+        DataSourceKind expectedSource,
+        long count,
+        bool expected)
+    {
+        var query = new CatalogRecordingQueryExecutor(_ => ThemeCountTable(count));
+        var service = new LegacyThemeCatalogPersistenceService(query);
+        var title = new string('가', 128);
+
+        var exists = await service.ThemeNameExistsAsync(market, title);
+
+        Assert.Equal(expected, exists);
+        var call = Assert.Single(query.Calls);
+        Assert.Equal(expectedSource, call.Source);
+        Assert.Equal(
+            market == ThemeMarket.Krx
+                ? LegacyThemeCatalogPersistenceService.NameExistsKrxQueryName
+                : LegacyThemeCatalogPersistenceService.NameExistsNxtQueryName,
+            call.TableName);
+        Assert.Contains("COUNT(*) THEME_COUNT", call.Spec.Sql, StringComparison.Ordinal);
+        Assert.Contains("s.SB_TITLE = ", call.Spec.Sql, StringComparison.Ordinal);
+        Assert.DoesNotContain(title, call.Spec.Sql, StringComparison.Ordinal);
+        var parameter = Assert.Single(call.Spec.Parameters);
+        Assert.Equal("theme_title", parameter.Name);
+        Assert.Equal(title, parameter.Value);
+        Assert.Equal(DbType.String, parameter.DbType);
+    }
+
     [Fact]
     public async Task SuggestNextCodeAsync_UsesReadOnlyProviderSpecificQueries()
     {
@@ -341,6 +375,14 @@ public sealed class LegacyThemeCatalogPersistenceServiceTests
     private static CatalogRecordingQueryExecutor UnusedQuery() =>
         new(_ => throw new InvalidOperationException("No read query was expected."));
 
+    private static DataTable ThemeCountTable(long count)
+    {
+        var table = new DataTable();
+        table.Columns.Add("THEME_COUNT", typeof(long));
+        table.Rows.Add(count);
+        return table;
+    }
+
     private static OperatorCatalogDbParameter Parameter(
         OperatorCatalogDbCommand command,
         string name) =>