feat: modernize legacy operator interface

tests/MBN_STOCK_WEBVIEW.LegacyWeb.Tests/LegacyWorkspaceLayoutContractTests.cs

@@ -12,6 +12,7 @@ public sealed class LegacyWorkspaceLayoutContractTests
         "Web");
     private static readonly string Markup = File.ReadAllText(Path.Combine(WebRoot, "index.html"));
     private static readonly string Styles = File.ReadAllText(Path.Combine(WebRoot, "styles.css"));
+    private static readonly string App = File.ReadAllText(Path.Combine(WebRoot, "app.js"));
     private static readonly string Navigation = File.ReadAllText(
         Path.Combine(WebRoot, "workspace-navigation.js"));
 
@@ -54,6 +55,62 @@ public sealed class LegacyWorkspaceLayoutContractTests
             Styles);
     }
 
+    [Fact]
+    public void ModernOperatorThemePreservesAccessibleAndSemanticStates()
+    {
+        Assert.Contains(
+            "Modern operator theme: visual-only overrides; geometry and native contracts stay intact",
+            Styles,
+            StringComparison.Ordinal);
+        Assert.Contains("--ui-canvas:", Styles, StringComparison.Ordinal);
+        Assert.Contains("--ui-accent:", Styles, StringComparison.Ordinal);
+        Assert.Contains("--ui-success:", Styles, StringComparison.Ordinal);
+        Assert.Contains("--ui-danger:", Styles, StringComparison.Ordinal);
+        Assert.Contains(
+            "font-family: \"Segoe UI Variable\", \"Segoe UI\", \"Noto Sans KR\"",
+            Styles,
+            StringComparison.Ordinal);
+        Assert.Matches(
+            new Regex(
+                @"button:focus-visible,[\s\S]*?outline:\s*2px solid var\(--ui-accent\)",
+                RegexOptions.CultureInvariant),
+            Styles);
+        Assert.Contains(".playlist-data-row.on-air.selected", Styles, StringComparison.Ordinal);
+        Assert.Contains(".playout-actions .take-in:not(:disabled)", Styles, StringComparison.Ordinal);
+        Assert.Contains(".playout-actions .next:not(:disabled)", Styles, StringComparison.Ordinal);
+        Assert.Contains(".playout-actions .take-out:not(:disabled)", Styles, StringComparison.Ordinal);
+        Assert.Contains(
+            ".playlist-data-row[data-active=\"true\"]:not(.on-air)",
+            Styles,
+            StringComparison.Ordinal);
+        Assert.Contains(
+            ".playlist-data-row[aria-selected=\"true\"]:not(.on-air)",
+            Styles,
+            StringComparison.Ordinal);
+        Assert.Contains("@media (forced-colors: active)", Styles, StringComparison.Ordinal);
+        Assert.Contains("scrollbar-gutter: stable", Styles, StringComparison.Ordinal);
+        Assert.Contains("@media (prefers-reduced-motion: reduce)", Styles, StringComparison.Ordinal);
+        Assert.Contains("aria-keyshortcuts=\"F8\"", Markup, StringComparison.Ordinal);
+        Assert.Contains("aria-keyshortcuts=\"Escape\"", Markup, StringComparison.Ordinal);
+        Assert.Contains(
+            ".connection-state.dry-run:not(.outcome-unknown)",
+            Styles,
+            StringComparison.Ordinal);
+        Assert.Contains("accessibleStates.push(\"현재 PGM\")", App, StringComparison.Ordinal);
+        Assert.Contains("accessibleStates.push(\"송출 후보\")", App, StringComparison.Ordinal);
+        Assert.Contains("accessibleStates.push(\"삭제 선택됨\")", App, StringComparison.Ordinal);
+        Assert.Matches(
+            new Regex(
+                @"id=""stock-search-button""[\s\S]*?<svg[^>]*viewBox=""0 0 24 24""",
+                RegexOptions.CultureInvariant),
+            Markup);
+        Assert.Matches(
+            new Regex(
+                @"class=""playlist-heading-icon""[\s\S]*?<svg[^>]*viewBox=""0 0 24 24""",
+                RegexOptions.CultureInvariant),
+            Markup);
+    }
+
     [Fact]
     public void NavigationChangesPresentationWithoutNativeOrStoredState()
     {