Add admin layout and customer pagination

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

@@ -62,7 +62,9 @@
                     @if (Model.Items.Count == 0)
                     {
                         <tr>
-                            <td colspan="6" class="text-center text-muted py-5">고객 데이터가 없습니다.</td>
+                            <td colspan="6">
+                                <partial name="_EmptyState" model="@("검색 결과가 없습니다.")" />
+                            </td>
                         </tr>
                     }
                     else
@@ -73,7 +75,7 @@
                                 <td class="fw-semibold">@item.Name</td>
                                 <td>@item.CompanyName</td>
                                 <td>@item.Phone</td>
-                                <td><span class="badge text-bg-secondary">@item.Status</span></td>
+                                <td><partial name="_StatusBadge" model="item.Status" /></td>
                                 <td>@item.CreatedAt.ToString("yyyy-MM-dd")</td>
                                 <td class="text-end">
                                     <a class="btn btn-sm btn-outline-secondary" href="/admin/customers/@item.Id">상세</a>
@@ -86,5 +88,6 @@
             </table>
         </div>
     </div>
-</section>
 
+    <partial name="_Pagination" model="new { Page = Model.CurrentPage, TotalPages = Model.TotalPages, BuildPageUrl = new Func<int, string>(Model.BuildPageUrl) }" />
+</section>