feat(admin): stabilize blog and admin patterns

TaxBaik.Application.Tests/BlogServiceTests.cs

@@ -44,15 +44,34 @@ public class BlogServiceTests
         Assert.Equal("같은-제목-2", post.Slug);
     }
 
+    [Fact]
+    public async Task DeleteAsync_SoftDeletesPost_AndExcludesFromSlugLookup()
+    {
+        var repository = new FakeBlogPostRepository
+        {
+            Posts =
+            [
+                new BlogPost { Id = 1, Title = "삭제 대상", Content = "본문", Slug = "delete-me", IsPublished = true }
+            ]
+        };
+        var service = new BlogService(repository, new MemoryCache(new MemoryCacheOptions()));
+
+        await service.DeleteAsync(1);
+
+        Assert.NotNull(repository.Posts.Single().DeletedAt);
+        Assert.Null(await service.GetBySlugAsync("delete-me"));
+        Assert.Null(await service.GetByIdAsync(1));
+    }
+
     private sealed class FakeBlogPostRepository : IBlogPostRepository
     {
         public List<BlogPost> Posts { get; init; } = [];
 
         public Task<BlogPost?> GetByIdAsync(int id, CancellationToken cancellationToken = default) =>
-            Task.FromResult(Posts.FirstOrDefault(x => x.Id == id));
+            Task.FromResult(Posts.FirstOrDefault(x => x.Id == id && x.DeletedAt == null));
 
         public Task<BlogPost?> GetBySlugAsync(string slug, CancellationToken cancellationToken = default) =>
-            Task.FromResult(Posts.FirstOrDefault(x => x.Slug == slug && x.IsPublished));
+            Task.FromResult(Posts.FirstOrDefault(x => x.Slug == slug && x.IsPublished && x.DeletedAt == null));
 
         public Task<(IEnumerable<BlogPost> Items, int Total)> GetPublishedPagedAsync(
             int page, int pageSize, int? categoryId = null, CancellationToken cancellationToken = default)
@@ -83,7 +102,15 @@ public class BlogServiceTests
 
         public Task UpdateAsync(BlogPost post, CancellationToken cancellationToken = default) => Task.CompletedTask;
 
-        public Task DeleteAsync(int id, CancellationToken cancellationToken = default) => Task.CompletedTask;
+        public Task DeleteAsync(int id, CancellationToken cancellationToken = default)
+        {
+            var post = Posts.FirstOrDefault(x => x.Id == id);
+            if (post != null)
+                post.DeletedAt = DateTime.UtcNow;
+            return Task.CompletedTask;
+        }
+
+        public Task ArchiveAsync(int id, CancellationToken cancellationToken = default) => DeleteAsync(id, cancellationToken);
 
         public Task IncrementViewCountAsync(int id, CancellationToken cancellationToken = default) => Task.CompletedTask;
     }