feat(app.js, i18n, index.html, styles.css): implement pagination for auth file management

- Added pagination controls to the auth file list in the UI, allowing users to navigate through large sets of files.
- Enhanced the rendering logic to support pagination, including updating the current page and total pages dynamically.
- Updated internationalization strings for pagination in both English and Chinese.
- Introduced new styles for pagination controls to improve user experience and accessibility.

index.html

@@ -520,6 +520,17 @@
                                 </div>
                                 <div class="card-content">
                                     <div id="auth-files-list" class="file-list file-grid"></div>
+                                    <div id="auth-files-pagination" class="pagination-controls" style="display: none;">
+                                        <button class="btn btn-secondary pagination-btn" data-action="prev">
+                                            <i class="fas fa-chevron-left"></i>
+                                            <span data-i18n="auth_files.pagination_prev">上一页</span>
+                                        </button>
+                                        <div id="auth-files-pagination-info" class="pagination-info">-</div>
+                                        <button class="btn btn-secondary pagination-btn" data-action="next">
+                                            <span data-i18n="auth_files.pagination_next">下一页</span>
+                                            <i class="fas fa-chevron-right"></i>
+                                        </button>
+                                    </div>
                                     <input type="file" id="auth-file-input" accept=".json" style="display: none;">
                                 </div>
                             </div>