Restore Slavic save lift and redress abstract underwear on load.

Recheck of slice 7 stage A found UpgradeOlderSave removed after UpperUnderwear, so format-2 nameSetId saves never started, and golden people.json wearing abstract Underwear failed RequireKnownApparel. Bring back the lift, treat unusable items as undressed, and restore GoldenSaveTests.

tests/HSchool.People.Tests/DressGeneratorTests.cs

@@ -130,9 +130,9 @@ public class DressGeneratorTests
             roster.Families,
             roster.Classes);
 
-        Assert.True(DressGenerator.NeedsDressing(stripped, ApplicantPool.Empty));
+        Assert.True(DressGenerator.NeedsDressing(catalog, stripped, ApplicantPool.Empty));
         var dressed = DressGenerator.EnsureRoster(catalog, stripped, Fixtures.SchoolSeed, Fixtures.AsOf);
-        Assert.False(DressGenerator.NeedsDressing(dressed, ApplicantPool.Empty));
+        Assert.False(DressGenerator.NeedsDressing(catalog, dressed, ApplicantPool.Empty));
         Assert.Equal(ItemsSnapshot(roster), ItemsSnapshot(dressed));
     }
 
@@ -180,6 +180,34 @@ public class DressGeneratorTests
         Assert.All(roster.People, person => Assert.True(person.Skills.ContainsKey("Hauling")));
     }
 
+    [Fact]
+    public void AbstractUnderwearInASave_IsRedressedOnEnsure()
+    {
+        var catalog = Fixtures.Catalog();
+        var roster = Fixtures.Generate(Fixtures.Classrooms(4));
+        var broken = new Roster(
+            roster.People.Select(person =>
+            {
+                var items = person.Items.Select(item =>
+                    item.Def.Equals("Briefs", StringComparison.Ordinal)
+                    || item.Def.Equals("Boxers", StringComparison.Ordinal)
+                    || item.Def.Equals("Panties", StringComparison.Ordinal)
+                        ? item with { Def = "Underwear" }
+                        : item).ToArray();
+                return person with { Items = items };
+            }).ToArray(),
+            roster.Families,
+            roster.Classes);
+
+        Assert.True(DressGenerator.NeedsDressing(catalog, broken, ApplicantPool.Empty));
+        var dressed = DressGenerator.EnsureRoster(catalog, broken, Fixtures.SchoolSeed, Fixtures.AsOf);
+        Assert.False(DressGenerator.NeedsDressing(catalog, dressed, ApplicantPool.Empty));
+        Assert.Equal(ItemsSnapshot(roster), ItemsSnapshot(dressed));
+        Assert.DoesNotContain(
+            dressed.People.SelectMany(person => person.Items),
+            item => item.Def.Equals("Underwear", StringComparison.Ordinal));
+    }
+
     private static string ItemsSnapshot(Roster roster) =>
         string.Join(
             '\n',