test: finish diagnostic classification

tests/AcDream.App.Tests/Rendering/CornerFloodReplayTests.cs

@@ -199,6 +199,7 @@ public class CornerFloodReplayTests
     /// </summary>
     [Fact]
     [Trait("Lane", "InstalledDat")]
+    [Trait("Purpose", "Diagnostic")]
     public void Diagnostic_TraceGoodVsGlitchStep()
     {
         var datDir = ResolveDatDir();
@@ -500,6 +501,7 @@ public class CornerFloodReplayTests
     /// </summary>
     [Fact]
     [Trait("Lane", "InstalledDat")]
+    [Trait("Purpose", "Diagnostic")]
     public void Diagnostic_Hop2Microscope()
     {
         var datDir = ResolveDatDir();
@@ -631,6 +633,7 @@ public class CornerFloodReplayTests
     /// </summary>
     [Fact]
     [Trait("Lane", "InstalledDat")]
+    [Trait("Purpose", "Diagnostic")]
     public void Diagnostic_CornerPress_FloodAcrossDoorwayPlane()
     {
         var datDir = ResolveDatDir();

tests/AcDream.App.Tests/Rendering/HouseExitWalkReplayTests.cs

@@ -437,6 +437,7 @@ public class HouseExitWalkReplayTests
 
     /// <summary>Full per-step table for the handoff doc.</summary>
     [Fact]
+    [Trait("Purpose", "Diagnostic")]
     public void Diagnostic_ExitWalk_PerStepTable()
     {
         var steps = RunExitWalk();
@@ -457,6 +458,7 @@ public class HouseExitWalkReplayTests
     /// cull ALL outdoor content — terrain included, not just the player).
     /// </summary>
     [Fact]
+    [Trait("Purpose", "Diagnostic")]
     public void Diagnostic_StaleRootWindow_EyeJustOutside()
     {
         var datDir = CornerFloodReplayTests.ResolveDatDir();

tests/AcDream.App.Tests/Rendering/Issue130DoorwayStripTests.cs

@@ -57,7 +57,7 @@ public class Issue130DoorwayStripTests
     }
 
     [Fact]
-    public void Diagnostic_ExitDoorTopEdge_GateVsAperture()
+    public void ExitDoorTopEdge_GateCoversLiftedApertureWithinPixelTolerance()
     {
         var datDir = CornerFloodReplayTests.ResolveDatDir();
         if (datDir is null) { _out.WriteLine("SKIP: dats unavailable"); Assert.Fail("Lane=InstalledDat requires an installed retail DAT directory; see docs/release-gate.md."); }

tests/AcDream.App.Tests/Rendering/Issue181VisFlapReplayTests.cs

@@ -117,6 +117,7 @@ public class Issue181VisFlapReplayTests
     }
 
     [Fact]
+    [Trait("Purpose", "Diagnostic")]
     public void Diagnostic_SubMillimeterEyePerturbation_MustNotChangeAdmission()
     {
         var datDir = CornerFloodReplayTests.ResolveDatDir();

tests/AcDream.App.Tests/Rendering/Issue95DungeonFloodDiagnosticTests.cs

@@ -44,6 +44,7 @@ public class Issue95DungeonFloodDiagnosticTests
     }
 
     [Fact]
+    [Trait("Purpose", "Diagnostic")]
     public void Measure_DungeonFlood_VisibleCellCount()
     {
         var datDir = CornerFloodReplayTests.ResolveDatDir();