Cập nhật tính năng quản lí dữ liệu mồ côi

frontend/index.html

@@ -138,6 +138,15 @@
                 </div>
                 <div id="tab-user-management" class="dashboard-tab-pane admin-only">
                     <h3>Quản lí người dùng</h3>
+                    <div class="admin-maintenance-header" style="margin-bottom: 20px;">
+                        <button class="edit-btn-large" onclick="openManualCleanupConfirm()" style="background: #17a2b8; width: auto; padding: 10px 20px; font-size: 14px;">
+                            🧹 Dọn dẹp dữ liệu mồ côi
+                        </button>
+                    </div>
+                    <div class="admin-search-container">
+                        <input type="text" id="admin-user-search-input" placeholder="Tìm kiếm theo tên, email, username..." onkeydown="if(event.key === 'Enter') loadAdminUsers(1)">
+                        <button onclick="loadAdminUsers(1)" class="admin-search-btn">Tìm kiếm</button>
+                    </div>
                     <div id="admin-users-list" class="dashboard-list"></div>
                     <div id="admin-users-pagination" class="pagination-container"></div>
                 </div>
@@ -423,6 +432,20 @@
         </div>
     </div>
 
+    <!-- Maintenance Confirmation Modal -->
+    <div id="maintenance-confirm-modal" class="modal-overlay">
+        <div class="modal-content action-modal-content logout-modal-dark">
+            <div id="maintenance-confirm-icon" style="font-size: 40px; color: #ffc107; margin-bottom: 10px;">⚙️</div>
+            <h2 style="color: #fff; margin-bottom: 10px;" id="maintenance-confirm-title">Xác nhận bảo trì</h2>
+            <p style="color: #ccc; margin-bottom: 25px;" id="maintenance-confirm-desc">Nội dung xác nhận...</p>
+            <input type="hidden" id="maintenance-action-type">
+            <div class="action-buttons">
+                <button id="maintenance-confirm-btn" class="edit-btn-large" style="background: #28a745;">Xác nhận thực hiện</button>
+                <button onclick="closeMaintenanceConfirm()" class="edit-btn-large" style="background: #6c757d;">Hủy bỏ</button>
+            </div>
+        </div>
+    </div>
+
     <!-- Logout Confirmation Modal -->
     <div id="logout-confirm-modal" class="modal-overlay">
         <div class="modal-content action-modal-content logout-modal-dark">