feat: enable initial-consonant search everywhere

tests/MBN_STOCK_WEBVIEW.LegacyApplication.Tests/TradingHalt/LegacyTradingHaltWorkflowTests.cs

@@ -34,6 +34,36 @@ public sealed class LegacyTradingHaltWorkflowTests
         Assert.Equal("가온전자", current.DisplayName);
     }
 
+    [Fact]
+    public async Task Search_AcceptsConservativeTruncationAfterInitialFiltering()
+    {
+        var service = new DelegateTradingHaltService
+        {
+            Search = (query, _, _) => Task.FromResult(
+                SearchResult(query, KospiAlpha) with { IsTruncated = true })
+        };
+        var controller = new LegacyTradingHaltWorkflowController(service);
+
+        var searched = await controller.SearchAsync("ㄱㅈ");
+
+        Assert.Equal(KospiAlpha.DisplayName, Assert.Single(searched.Results).DisplayName);
+        Assert.True(searched.IsTruncated);
+    }
+
+    [Fact]
+    public async Task Search_StillRejectsImpossiblePartialTruncationForOrdinaryText()
+    {
+        var service = new DelegateTradingHaltService
+        {
+            Search = (query, _, _) => Task.FromResult(
+                SearchResult(query, KospiAlpha) with { IsTruncated = true })
+        };
+        var controller = new LegacyTradingHaltWorkflowController(service);
+
+        await Assert.ThrowsAsync<TradingHaltSelectionDataException>(
+            () => controller.SearchAsync("Alpha"));
+    }
+
     [Fact]
     public async Task SearchSelect_MaterializesClosedCurrentAndCandleDraftsFromActionIdOnly()
     {