feat(links): move friend links to native WordPress links with review flow

- enable the native Links manager and drop the custom friend-link option/REST path
- add per-page link settings for the friends template
- render link categories from get_bookmarks() with search and page-content options
- add a validated public link submission endpoint with logo upload, captcha, rate limiting and duplicate checks
- create pending links for review and notify administrators by email and in-app message
- add native Links admin pending count, columns and edit notes
- cover the new submission and cleanup contracts

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

templates/pages/page-friends.php

@@ -10,7 +10,10 @@ defined('ABSPATH') || exit;
 
 get_header();
 
-$links = function_exists('jio_get_friend_links') ? jio_get_friend_links() : [];
+$post_id  = (int) get_queried_object_id();
+$settings = function_exists('jio_get_page_links_settings') ? jio_get_page_links_settings($post_id) : [];
+$links_html = function_exists('jio_page_links_html') ? jio_page_links_html($post_id) : '';
+$search_html = function_exists('jio_link_get_search_cover') ? jio_link_get_search_cover($post_id) : '';
 
 if (function_exists('jio_archive_open_shell')) {
 	jio_archive_open_shell([
@@ -26,39 +29,40 @@ if (function_exists('jio_archive_open_shell')) {
 							'title' => esc_html__('友情链接', 'jio'),
 							'desc'  => __('与这些优秀的站点交换友链', 'jio'),
 						]);
+						echo $search_html; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped -- helper returns escaped markup.
+
+						if (!empty($settings['content_s']) && ($settings['content_position'] ?? 'top') === 'top') {
+							echo '<div class="zib-widget mb20"><article class="article content-main__body">';
+							the_content();
+							echo '</article></div>';
+						}
+
+						echo $links_html; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped -- helper returns escaped markup.
+
+						if (!empty($settings['content_s']) && ($settings['content_position'] ?? 'top') !== 'top') {
+							echo '<div class="zib-widget mb20"><article class="article content-main__body">';
+							the_content();
+							echo '</article></div>';
+						}
+
+						if (!empty($settings['submit_s']) && !empty($settings['submit_title'])) {
+							printf(
+								'<p class="text-center" style="margin-top:24px;"><a class="padding-h10 hollow but c-theme btn-block" href="#submit-links-modal" data-toggle="modal">%s</a></p>',
+								esc_html((string) $settings['submit_title'])
+							);
+						}
 						?>
-
-						<?php if (!empty($links)) : ?>
-							<div class="friends-grid">
-								<?php foreach ($links as $link) : ?>
-									<a class="friend-card" href="<?php echo esc_url($link['url'] ?? '#'); ?>" target="_blank" rel="noopener noreferrer">
-										<?php
-										$logo = $link['logo'] ?? '';
-										if ($logo) {
-											echo '<img class="friend-card__avatar" src="' . esc_url($logo) . '" alt="">';
-										} else {
-											$initial = function_exists('mb_substr') ? mb_substr((string) ($link['name'] ?? 'A'), 0, 1, 'UTF-8') : substr((string) ($link['name'] ?? 'A'), 0, 1);
-											echo '<div class="friend-card__avatar" style="display:flex;align-items:center;justify-content:center;font-weight:800;color:var(--color-primary);font-family:var(--font-heading);">' . esc_html($initial) . '</div>';
-										}
-										?>
-										<div class="friend-card__info">
-											<h3 class="friend-card__name"><?php echo esc_html($link['name'] ?? ''); ?></h3>
-											<p class="friend-card__desc"><?php echo esc_html($link['description'] ?? ''); ?></p>
-										</div>
-									</a>
-								<?php endforeach; ?>
-							</div>
-						<?php else : ?>
-							<div class="no-results content-stream__empty">
-								<p><?php esc_html_e('暂无友链，请在主题后台添加。', 'jio'); ?></p>
-							</div>
-						<?php endif; ?>
-
-						<p class="text-center" style="margin-top:32px;">
-							<a class="btn-outline" href="<?php echo esc_url(home_url('/')); ?>"><?php esc_html_e('返回首页', 'jio'); ?></a>
-						</p>
 					</div>
 <?php
+if (!empty($settings['submit_s'])) {
+	echo jio_submit_links_modal([ // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped -- helper returns escaped markup.
+		'title' => (string) ($settings['submit_title'] ?? ''),
+		'dec'   => (string) ($settings['submit_dec'] ?? ''),
+		'sign'  => !empty($settings['submit_sign_s']),
+		'cats'  => (array) ($settings['submit_cats'] ?? []),
+	], $post_id);
+}
+
 if (function_exists('jio_archive_close_shell')) {
 	jio_archive_close_shell(['has_sidebar' => false]);
 }