test(scoreboard): check shared dev-build gate

HANDOFF.md

@@ -8,23 +8,25 @@
 - `ScoreboardPropertiesTests` now checks for the themed `PropertyPillCheck` style instead of stale
   `YtCheckBox` markup; committed as `221b816`.
 - `PropertiesHierarchyTests` now checks shared styles and scopes the duplicate shape bindings to
-  the Shape block; focused test passes. This task is ready to commit.
-- `GeometryFieldWidthTests` now identifies the shared draggable-layer Geometry block; focused test
-  passes. This task is ready to commit.
-- `NotificationServiceTests` now run tint assertions with the real theme resources and expect the
-  current `Brush.ErrorContainer` token; all 8 tests in that class pass. This task is ready to commit.
-- Clean app build is 0 warnings. Full suite: 5 failed / 517 passed of 522; remaining failures are
+  the Shape block; committed as `91e308e`.
+- `GeometryFieldWidthTests` now identifies the shared draggable-layer Geometry block; committed as
+  `82609a5`.
+- `NotificationServiceTests` runs tint assertions with real theme resources and uses the current
+  `Brush.ErrorContainer` token; committed as `caf91e6`.
+- `ScoreboardSimulationTests` now checks the shared `Helpers/DevBuild.cs` compile-time gate; focused
+  test passes. This task is ready to commit.
+- Clean app build is 0 warnings. Full suite: 4 failed / 518 passed of 522; remaining failures are
   being handled one task and one local commit at a time.
 
 ## Next action
 
-Commit the notification tint test fix, then take the next remaining failure. Do not push absent a
-milestone/checkpoint request.
+Commit the scoreboard-simulation guard update, then take the next remaining failure. Do not push
+absent a milestone/checkpoint request.
 
 ## Landmines
 
 - Build/test with Windows `dotnet.exe`; the full suite can hang in WASAPI teardown.
-- `verify.sh` cannot pass until the remaining 5 suite failures are resolved; scope checks are run
+- `verify.sh` cannot pass until the remaining 4 suite failures are resolved; scope checks are run
   separately when that gate exits early.
 - Any integration test constructing `MainWindow` must set `LayoutPathOverride` to a temporary DB
   and clear it in `finally`.

ytLive.Tests/ScoreboardSimulationTests.cs

@@ -42,9 +42,11 @@ public class ScoreboardSimulationTests
         var type = typeof(MainViewModel);
         Assert.NotNull(type.GetProperty("ScoreboardSimulate"));
         Assert.NotNull(type.GetProperty("IsDevelopmentBuild"));
-        // DEBUG-gated at compile time, so a Release build has no dev control at all.
-        Assert.Contains("#if DEBUG", vmSource);
-        Assert.Contains("private const bool DevelopmentBuild = true;", vmSource);
-        Assert.Contains("private const bool DevelopmentBuild = false;", vmSource);
+        // DEBUG-gated at compile time through the shared build flag, not duplicated in the VM.
+        var devBuild = SourceAssert.Text("Helpers", "DevBuild.cs");
+        Assert.Contains("#if DEBUG", devBuild);
+        Assert.Contains("true;", devBuild);
+        Assert.Contains("#else", devBuild);
+        Assert.Contains("false;", devBuild);
     }
 }