Align admin list empty states and blog category guard

src/TaxBaik.Application/Services/BlogService.cs

@@ -8,7 +8,11 @@ using TaxBaik.Domain.Interfaces;
 
 using Microsoft.Extensions.Caching.Memory;
 
-public class BlogService(IBlogPostRepository repository, IMemoryCache memoryCache, IValidator<CreateBlogPostDto> validator)
+public class BlogService(
+    IBlogPostRepository repository,
+    ICategoryRepository categoryRepository,
+    IMemoryCache memoryCache,
+    IValidator<CreateBlogPostDto> validator)
 {
     public async Task<BlogPost?> GetByIdAsync(int id, CancellationToken ct = default) =>
         await repository.GetByIdAsync(id, ct);
@@ -62,6 +66,7 @@ public class BlogService(IBlogPostRepository repository, IMemoryCache memoryCach
     public async Task<BlogPost> CreateAsync(CreateBlogPostDto dto, CancellationToken ct = default)
     {
         validator.ValidateAndThrow(dto);
+        dto.CategoryId = await EnsureCategoryIdAsync(dto.CategoryId, ct);
         var post = new BlogPost
         {
             Title = dto.Title,
@@ -90,6 +95,7 @@ public class BlogService(IBlogPostRepository repository, IMemoryCache memoryCach
     public async Task<BlogPost?> UpdateAsync(int id, CreateBlogPostDto dto, CancellationToken ct = default)
     {
         validator.ValidateAndThrow(dto);
+        dto.CategoryId = await EnsureCategoryIdAsync(dto.CategoryId, ct);
         var post = await repository.GetByIdAsync(id, ct);
         if (post == null)
             return null;
@@ -178,6 +184,15 @@ public class BlogService(IBlogPostRepository repository, IMemoryCache memoryCach
 
     private static int NormalizePageSize(int pageSize) => Math.Clamp(pageSize, 1, 100);
 
+    private async Task<int> EnsureCategoryIdAsync(int categoryId, CancellationToken ct)
+    {
+        if (categoryId > 0)
+            return categoryId;
+
+        var firstCategory = (await categoryRepository.GetAllAsync(ct)).FirstOrDefault();
+        return firstCategory?.Id ?? throw new ValidationException("블로그 카테고리를 먼저 생성하세요.");
+    }
+
     public async Task<(int TotalPosts, int PublishedPosts)> GetStatsAsync(CancellationToken ct = default)
     {
         var posts = (await repository.GetAllForAdminAsync(ct)).ToList();

src/TaxBaik.Web/Pages/Admin/Announcements/Index.cshtml

@@ -5,6 +5,14 @@
 <section class="admin-page-shell">
     @await Html.PartialAsync("_AdminPageHeader", new TaxBaik.Web.Models.AdminPageHeaderModel("Content", "공지사항 관리", "공지 목록을 서버 렌더링으로 표시합니다.", "/admin/announcements/create", "공지 작성"))
     <div class="card">
+        @if (Model.Items.Count == 0)
+        {
+            <div class="card-body">
+                @await Html.PartialAsync("_EmptyState", "공지사항이 없습니다.")
+            </div>
+        }
+        else
+        {
             <div class="table-responsive">
                 <table class="table table-vcenter card-table table-hover">
                     <thead>
@@ -17,13 +25,7 @@
                         </tr>
                     </thead>
                     <tbody>
-                @if (Model.Items.Count == 0)
+                        @foreach (var item in Model.Items)
-                {
-                    <tr><td colspan="5">@await Html.PartialAsync("_EmptyState", "공지사항이 없습니다.")</td></tr>
-                }
-                else
-                {
-                    foreach (var item in Model.Items)
                         {
                             <tr>
                                 <td class="fw-semibold">@item.Title</td>
@@ -38,10 +40,10 @@
                                 </td>
                             </tr>
                         }
-                }
                     </tbody>
                 </table>
             </div>
+        }
     </div>
 </section>
 

src/TaxBaik.Web/Pages/Admin/Blog/Index.cshtml

@@ -24,6 +24,14 @@
     </form>
 
     <div class="card">
+        @if (Model.Items.Count == 0)
+        {
+            <div class="card-body">
+                @await Html.PartialAsync("_EmptyState", "블로그 글이 없습니다.")
+            </div>
+        }
+        else
+        {
             <div class="table-responsive">
                 <table class="table table-vcenter card-table table-hover">
                     <thead>
@@ -36,15 +44,7 @@
                         </tr>
                     </thead>
                     <tbody>
-                @if (Model.Items.Count == 0)
+                        @foreach (var post in Model.Items)
-                {
-                    <tr>
-                        <td colspan="5">@await Html.PartialAsync("_EmptyState", "블로그 글이 없습니다.")</td>
-                    </tr>
-                }
-                else
-                {
-                    foreach (var post in Model.Items)
                         {
                             <tr>
                                 <td>
@@ -62,10 +62,10 @@
                                 </td>
                             </tr>
                         }
-                }
                     </tbody>
                 </table>
             </div>
+        }
     </div>
 </section>