fix(viewer): fresh signups start at tutorial_state=0, not 100

Previously RegisterAnonymousViewer auto-completed the tutorial, which
prevented the client from ever entering the tutorial flow. SeedViewerAsync
gains a tutorialState parameter (default 100) so existing tests keep
their pre-completed-tutorial assumption.

SVSim.Database/Repositories/Viewer/ViewerRepository.cs

@@ -180,7 +180,7 @@ public class ViewerRepository : IViewerRepository
         viewer.Currency.Crystals = grants.Crystals;
         viewer.Currency.Rupees = grants.Rupees;
         viewer.Currency.RedEther = grants.Ether;
-        viewer.MissionData.TutorialState = 100; // finishes tutorial for now
+        viewer.MissionData.TutorialState = 0; // PRE_TUTORIAL_STEP — fresh signups go through the tutorial flow
 
         // Load classes WITH their LeaderSkins — DefaultLeaderSkin iterates the nav collection
         // and would otherwise be null (audit §6 #3 latent NRE — this is the one).

SVSim.UnitTests/Infrastructure/SVSimTestFactory.cs

@@ -150,7 +150,8 @@ internal sealed class SVSimTestFactory : WebApplicationFactory<Program>
     /// </summary>
     public async Task<long> SeedViewerAsync(
         ulong steamId = 76_561_198_000_000_001UL,
-        string displayName = "Test Viewer")
+        string displayName = "Test Viewer",
+        int tutorialState = 100)
     {
         long viewerId;
         long shortUdid;
@@ -173,6 +174,19 @@ internal sealed class SVSimTestFactory : WebApplicationFactory<Program>
             await db.SaveChangesAsync();
         }
 
+        // Third scope: override TutorialState to the requested value when non-zero.
+        // BuildDefaultViewer now starts viewers at 0 (PRE_TUTORIAL_STEP). Tests that want
+        // a pre-completed-tutorial viewer (the common case for existing tests) pass the
+        // default tutorialState=100 here.
+        if (tutorialState != 0)
+        {
+            using var scope = Services.CreateScope();
+            var db = scope.ServiceProvider.GetRequiredService<SVSimDbContext>();
+            var viewer = await db.Viewers.Include(v => v.MissionData).FirstAsync(v => v.Id == viewerId);
+            viewer.MissionData.TutorialState = tutorialState;
+            await db.SaveChangesAsync();
+        }
+
         return viewerId;
     }
 

SVSim.UnitTests/Repositories/ViewerRepositoryTutorialDefaultTests.cs

@@ -0,0 +1,24 @@
+using Microsoft.Extensions.DependencyInjection;
+using NUnit.Framework;
+using SVSim.Database;
+using SVSim.Database.Repositories.Viewer;
+using SVSim.UnitTests.Infrastructure;
+
+namespace SVSim.UnitTests.Repositories;
+
+public class ViewerRepositoryTutorialDefaultTests
+{
+    [Test]
+    public async Task RegisterAnonymousViewer_starts_at_tutorial_step_0()
+    {
+        using var factory = new SVSimTestFactory();
+        using var scope = factory.Services.CreateScope();
+        var repo = scope.ServiceProvider.GetRequiredService<IViewerRepository>();
+
+        var viewer = await repo.RegisterAnonymousViewer(Guid.NewGuid());
+
+        Assert.That(viewer.MissionData.TutorialState, Is.EqualTo(0),
+            "Fresh signups must start at PRE_TUTORIAL_STEP=0 so the client triggers the tutorial flow. " +
+            "Tests that want a pre-completed tutorial should use SeedViewerAsync (which defaults to 100).");
+    }
+}