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

TaxBaik.Web/Components/Admin/Pages/Announcements/AnnouncementList.razor

@@ -22,14 +22,22 @@
     </MudButton>
 </section>
 
+<div class="d-flex pa-4 gap-4 align-center">
+    <MudTextField @bind-Value="searchQuery" Placeholder="공지사항 제목 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" Elevation="0">
     @if (announcements is null)
     {
         <MudProgressLinear Indeterminate="true" />
     }
-    else if (!announcements.Any())
+    else if (!FilteredAnnouncements.Any())
     {
-        <MudText Class="pa-4 text-muted">등록된 공지사항이 없습니다.</MudText>
+        <div class="pa-6 text-center">
+            <MudIcon Icon="@Icons.Material.Filled.Campaign" Style="font-size:3rem; opacity:.3;" />
+            <MudText Class="mt-2 text-muted">검색 조건에 맞는 공지사항이 없습니다.</MudText>
+        </div>
     }
     else
     {
@@ -45,7 +53,7 @@
                 </tr>
             </thead>
             <tbody>
-                @foreach (var item in announcements)
+                @foreach (var item in FilteredAnnouncements)
                 {
                     <tr>
                         <td>@item.Title</td>
@@ -86,6 +94,9 @@
                 }
             </tbody>
         </MudSimpleTable>
+        <MudText Typo="Typo.caption" Class="pa-2 text-muted">
+            검색 결과 @(FilteredAnnouncements.Count())개 · 총 @(announcements.Count)개
+        </MudText>
     }
 </MudPaper>
 
@@ -94,6 +105,12 @@
     private Task<AuthenticationState>? AuthStateTask { get; set; }
 
     private List<Announcement>? announcements;
+    private string searchQuery = "";
+
+    private IEnumerable<Announcement> FilteredAnnouncements => announcements?
+        .Where(a => string.IsNullOrEmpty(searchQuery) || 
+                    a.Title.Contains(searchQuery, StringComparison.OrdinalIgnoreCase))
+        .OrderBy(a => a.SortOrder) ?? Enumerable.Empty<Announcement>();
 
     protected override async Task OnAfterRenderAsync(bool firstRender)
     {