feat(single): align author bar follow and reward actions with the site flows

- guests get the sign-in trigger instead of a redirect to the login page,
  for both follow and wallet reward controls
- follow requests swap the label for an inline loader and block a second
  submit; the followed state uses the .actived hook
- follower counts sync through data-follow-count on the user homepage
  (the previous selector matched nothing) and only for the viewed profile
- reward button uses the secondary action colour; the reward template is
  only rendered for signed-in visitors
- drop the unused author-hero aria-disabled rule and stale wording in the
  touched comments

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

assets/css/frontend/base.css

@@ -251,6 +251,22 @@ main.container,
 .user-card.author .user-name > name > .follow {
   flex-shrink: 0;
 }
+
+/* Follow control: the pending request swaps the label for an inline loader
+ * and blocks a second submit. The followed state is carried by .actived. */
+[data-jio-follow][aria-disabled="true"] {
+  cursor: no-drop;
+  opacity: 0.6;
+}
+
+[data-jio-follow][aria-disabled="true"]:hover {
+  opacity: 0.6;
+}
+
+[data-jio-follow] .loading {
+  vertical-align: -0.1em;
+}
+
 .jio-author-hero__name,
 .uc-header__name {
   display: inline-flex;