Write what N1MM needs before it will open a log

Checked by opening a log this program wrote in N1MM 1.0.11031. Three things it
rejected:

- a log naming a contest with no row in the Contest table throws "No current
  row" in Contest.FromRow, so the definition row is written whenever a contest
  is opened;
- an empty overlay category is answered with "Invalid Overlay Category:", so an
  entry with no overlay now says "N/A", and the dialog offers N1MM's list;
- the sent exchange omits the report, which is what N1MM's own contest dialog
  asks for.

With those three fixed N1MM opens the log and shows the contacts.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

tests/Nonemm.Session.Tests/ContestDefinitionsTests.cs

@@ -0,0 +1,42 @@
+using Nonemm.Contests.Rules;
+using Nonemm.Core;
+using Nonemm.Storage;
+
+namespace Nonemm.Session.Tests;
+
+public class ContestDefinitionsTests
+{
+    [Fact]
+    public void NamesAndModeComeFromTheContest()
+    {
+        ContestDefinition definition = ContestDefinitions.For(new CqWorldWide(ModeCategory.Cw));
+        Assert.Equal("CQWW", definition.Name);
+        Assert.Equal("CQ-WW-CW", definition.CabrilloName);
+        Assert.Equal("CW", definition.Mode);
+    }
+
+    [Fact]
+    public void MultiplierNamesFillUpToThree()
+    {
+        ContestDefinition definition = ContestDefinitions.For(new CqWorldWide(ModeCategory.Cw));
+        Assert.Equal("Zones", definition.Multiplier1Name);
+        Assert.Equal("Countries", definition.Multiplier2Name);
+        Assert.Equal("N/A", definition.Multiplier3Name);
+    }
+
+    [Theory]
+    [InlineData(typeof(Sweepstakes), 1)]
+    [InlineData(typeof(CqWorldWide), 2)]
+    [InlineData(typeof(IaruHf), 3)]
+    public void DupeScopeBecomesN1mmsDupeType(Type contest, int expected)
+    {
+        object made = contest == typeof(IaruHf)
+            ? new IaruHf()
+            : Activator.CreateInstance(contest, ModeCategory.Cw)!;
+        Assert.Equal(expected, ContestDefinitions.For((Contests.Contest)made).DupeType);
+    }
+
+    [Fact]
+    public void ContestWithSeveralModesIsBoth() =>
+        Assert.Equal("BOTH", ContestDefinitions.For(new IaruHf()).Mode);
+}

tests/Nonemm.Session.Tests/FakeLogStore.cs

@@ -10,6 +10,12 @@ public sealed class FakeLogStore : LogStore
 {
     private readonly List<Qso> qsos = [];
     private readonly List<ContestInstance> contests = [];
+    private readonly List<ContestDefinition> definitions = [];
+
+    public IReadOnlyList<ContestDefinition> Definitions => definitions;
+
+    public void SaveContestDefinition(ContestDefinition definition) =>
+        definitions.Add(definition);
 
     public IReadOnlyList<ContestInstance> Contests() => contests;
 

tests/Nonemm.Storage.Tests/ContestInstanceTests.cs

@@ -0,0 +1,10 @@
+namespace Nonemm.Storage.Tests;
+
+public class ContestInstanceTests
+{
+    /// N1MM answers "Invalid Overlay Category:" and will not open a contest
+    /// whose overlay column is empty, so an entry with no overlay says "N/A".
+    [Fact]
+    public void OverlayCategoryDefaultsToNotApplicable() =>
+        Assert.Equal("N/A", new ContestInstance { ContestNumber = 1, ContestName = "CQWW" }.OverlayCategory);
+}