feat(admin): 공지사항, FAQ, 블로그 목록 검색 필터 추가 및 블로그 미리보기 탭 탑재, FAQ 순서 조정 기능 구현

TaxBaik.Web/Components/Admin/Pages/Blog/BlogList.razor

@@ -15,14 +15,19 @@
         Href="/taxbaik/admin/blog/create">새 포스트 작성</MudButton>
 </section>
 
+<div class="d-flex pa-4 gap-4 align-center">
+    <MudTextField @bind-Value="searchQuery" Placeholder="블로그 제목 또는 본문 검색..." Adornment="Adornment.Start" 
+                  AdornmentIcon="@Icons.Material.Filled.Search" IconSize="Size.Medium" Class="flex-grow-1" Immediate="true" Clearable="true" />
+</div>
+
 <MudPaper Class="admin-surface mb-4" Elevation="0">
     <MudStack Row="true" AlignItems="AlignItems.Center" Justify="Justify.SpaceBetween">
-        <MudText Typo="Typo.subtitle1">@($"전체 포스트 {totalPosts}개")</MudText>
+        <MudText Typo="Typo.subtitle1">@($"검색 결과 {FilteredPosts.Count()}개 / 전체 포스트 {totalPosts}개")</MudText>
         <MudText Typo="Typo.body2">페이지 @currentPage / @totalPages</MudText>
     </MudStack>
 </MudPaper>
 
-<MudDataGrid Items="@posts" Striped="true" Hoverable="true" Loading="@isLoading" Class="admin-grid">
+<MudDataGrid Items="@FilteredPosts" Striped="true" Hoverable="true" Loading="@isLoading" Class="admin-grid">
     <Columns>
         <PropertyColumn Property="x => x.Title" Title="제목" />
         <PropertyColumn Property="x => x.IsPublished" Title="발행">
@@ -54,12 +59,18 @@
     private Task<AuthenticationState>? AuthStateTask { get; set; }
 
     private List<TaxBaik.Domain.Entities.BlogPost> posts = [];
+    private string searchQuery = "";
     private bool isLoading = true;
     private int currentPage = 1;
     private int totalPages = 1;
     private int totalPosts = 0;
     private const int PageSize = 20;
 
+    private IEnumerable<TaxBaik.Domain.Entities.BlogPost> FilteredPosts => posts?
+        .Where(p => string.IsNullOrEmpty(searchQuery) || 
+                    p.Title.Contains(searchQuery, StringComparison.OrdinalIgnoreCase) || 
+                    (p.Content != null && p.Content.Contains(searchQuery, StringComparison.OrdinalIgnoreCase))) ?? Enumerable.Empty<TaxBaik.Domain.Entities.BlogPost>();
+
     protected override async Task OnAfterRenderAsync(bool firstRender)
     {
         if (firstRender)