feat(identity): tip QR upload, metrics engine, comment moderate caps

Close identity 1:1 gaps after p1: user-center weixin/alipay tip QR
upload+save, AKSRT_User_Metrics counters for medal get_type and level
XP bridges, forum/revenue/signin hooks, comment moderate via user_caps,
and clearer free-task deep links/status CTAs.

inc/classes/class-aksrt-user-badges.php

@@ -477,11 +477,10 @@ class AKSRT_User_Badges {
 				return (float) $counts;
 
 			case 'followed':
-				$meta = get_user_meta($user_id, 'followed-user', true);
-				if (!is_array($meta)) {
-					$meta = get_user_meta($user_id, 'aksrt_followed_users', true);
+				if (class_exists('AKSRT_Follow')) {
+					return (float) AKSRT_Follow::get_instance()->get_follower_count($user_id);
 				}
-				return is_array($meta) ? (float) count($meta) : 0.0;
+				return 0.0;
 
 			case 'like':
 				return (float) get_user_meta($user_id, 'aksrt_posts_like_sum', true);
@@ -505,7 +504,23 @@ class AKSRT_User_Badges {
 				return (float) get_user_meta($user_id, 'aksrt_bbs_score_sum', true);
 
 			case 'views':
-				return (float) get_user_meta($user_id, 'aksrt_posts_views_sum', true);
+				$sum = (float) get_user_meta($user_id, 'aksrt_posts_views_sum', true);
+				if ($sum > 0) {
+					return $sum;
+				}
+				// Lazy backfill once from postmeta.
+				global $wpdb;
+				$sum = (float) $wpdb->get_var($wpdb->prepare(
+					"SELECT COALESCE(SUM(CAST(pm.meta_value AS UNSIGNED)),0)
+					 FROM {$wpdb->posts} p
+					 INNER JOIN {$wpdb->postmeta} pm ON pm.post_id = p.ID AND pm.meta_key = 'aksrt_post_views'
+					 WHERE p.post_author = %d AND p.post_type = 'post' AND p.post_status = 'publish'",
+					$user_id
+				));
+				if ($sum > 0) {
+					update_user_meta($user_id, 'aksrt_posts_views_sum', $sum);
+				}
+				return $sum;
 
 			case 'pay_income':
 				return (float) get_user_meta($user_id, 'aksrt_pay_income_sum', true);