fix(single): match reference article action bar 1:1

The action bar used a locally invented pill-chip style that overrode the
reference theme's 80px icon-over-text columns, and the JS toggled a
class no stylesheet targeted — so likes/favorites showed no selected
state at all.

- restore reference markup: <svg class="icon"> + <text>/<count> and the
  actived class, with data-stat-count/data-base-count preserved
- toggle actived plus a transient action-animation so the lovestar
  keyframes finally reach the DOM
- drop the CSS overrides and now-dead action-btn/.action-btn--reward
  and .post-actions-card rules; main.css already carried the reference
  rules the overrides were shadowing

assets/css/frontend/enhancements/components/base.css

@@ -1,14 +1,6 @@
 /* ============================================================
- * 8. 打赏按钮
+ * 8. 打赏弹窗
  * ============================================================ */
-.action-btn--reward {
-    position: relative;
-}
-
-.action-btn--reward.is-active {
-    color: var(--color-warning, #F59E0B);
-}
-
 .reward-modal {
     position: fixed;
     inset: 0;