refactor(data): centralize list seeding in MigrateAndConfigure, add default-value test

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/ClaudeDo.App/Program.cs

@@ -2,7 +2,6 @@ using Avalonia;
 using ClaudeDo.Data;
 using ClaudeDo.Data.Git;
 using ClaudeDo.Data.Repositories;
-using ClaudeDo.Data.Seeding;
 using ClaudeDo.Ui;
 using ClaudeDo.Ui.Services;
 using ClaudeDo.Ui.ViewModels;
@@ -31,7 +30,6 @@ sealed class Program
         {
             var db = scope.ServiceProvider.GetRequiredService<ClaudeDoDbContext>();
             ClaudeDoDbContext.MigrateAndConfigure(db);
-            DefaultListsSeeder.SeedAsync(db).GetAwaiter().GetResult();
         }
 
         try

src/ClaudeDo.Data/ClaudeDoDbContext.cs

@@ -1,4 +1,5 @@
 using ClaudeDo.Data.Models;
+using ClaudeDo.Data.Seeding;
 using Microsoft.EntityFrameworkCore;
 using Microsoft.EntityFrameworkCore.Infrastructure;
 using Microsoft.EntityFrameworkCore.Storage;
@@ -73,5 +74,6 @@ public class ClaudeDoDbContext : DbContext
         }
 
         db.Database.Migrate();
+        DefaultListsSeeder.SeedAsync(db).GetAwaiter().GetResult();
     }
 }

src/ClaudeDo.Installer/Steps/InitDatabaseStep.cs

@@ -1,5 +1,4 @@
 using ClaudeDo.Data;
-using ClaudeDo.Data.Seeding;
 using ClaudeDo.Installer.Core;
 using Microsoft.EntityFrameworkCore;
 
@@ -21,7 +20,6 @@ public sealed class InitDatabaseStep : IInstallStep
                 .Options;
             using var context = new ClaudeDoDbContext(options);
             ClaudeDoDbContext.MigrateAndConfigure(context);
-            DefaultListsSeeder.SeedAsync(context).GetAwaiter().GetResult();
 
             progress.Report("Schema applied successfully");
             return Task.FromResult(StepResult.Ok());