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

tools/admin-contract-report.json

@@ -1,5 +1,5 @@
 {
-    "generated_at": "2026-09-27T06:39:18+00:00",
+    "generated_at": "2026-09-27T07:36:13+00:00",
     "errors": [],
     "warnings": [
         "customPage tools-update section 'tools/update' not in PHP schema (ok if pure operational page)",