feat(credits): free points tasks matrix, day cap, and tasks tab

Add AKSRT_Points_Free for catalog/day-max/daily detail, wire the full
earn matrix (login, post, like, favorite, follow, comment, forum),
expose 积分任务 + 每日详情 tabs, and expand admin free-task settings.

inc/helpers/user-center-renderers/credits-balance.php

@@ -50,6 +50,7 @@ $currency = (string) ($currency_name ?? __('积分', 'aksrt'));
 		</div>
 	</div>
 	<p class="uc-balance-card__tip muted-2-color em09" data-signin-tip></p>
+	<button type="button" class="uc-asset-card__link muted-2-color em09" data-aksrt-asset-tab="points_free"><?php esc_html_e('做任务赚积分', 'aksrt'); ?><i class="fa fa-angle-right em12 ml3" aria-hidden="true"></i></button>
 </div>
 
 <?php if ($points_buy_on) :