feat(identity): close free-task progress, level card, hot threshold

Finish remaining 1:1 parity gaps: free-task done/progress DTO with
daily marks, user-center level/integral card UI, configurable forum
hot recommend threshold, and task progress bars.

inc/classes/admin/schema/class-aksrt-admin-schema-forum-credits.php

@@ -24,6 +24,7 @@ class AKSRT_Admin_Schema_Forum_Credits {
                     ['key' => 'bbs_credits_score_extra', 'label' => '被加分', 'type' => 'number', 'default' => 3, 'min' => 0],
                     ['key' => 'bbs_credits_essence', 'label' => '被设精华', 'type' => 'number', 'default' => 10, 'min' => 0],
                     ['key' => 'bbs_credits_posts_hot', 'label' => '成为热帖', 'type' => 'number', 'default' => 5, 'min' => 0],
+                    ['key' => 'bbs_hot_recommend_threshold', 'label' => '热帖推荐分阈值', 'type' => 'number', 'default' => 500, 'min' => 1, 'help' => '推荐分达到该值触发热帖奖励与勋章累计'],
                     ['key' => 'bbs_credits_adopted', 'label' => '被采纳', 'type' => 'number', 'default' => 20, 'min' => 0],
                     ['key' => 'bbs_credits_daily_max', 'label' => '每日积分上限', 'type' => 'number', 'default' => 50, 'min' => 0, 'help' => '0 = 不限'],
                 ]],