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>

templates/parts/single-author-bar.php

@@ -19,7 +19,7 @@ $author_id = (int) get_the_author_meta('ID');
 $author_name = get_the_author();
 $author_url = function_exists('jio_get_user_home_url') ? jio_get_user_home_url($author_id) : get_author_posts_url($author_id);
 
-// 时间显示：完全按参考主题 zib_get_post_time_tooltip 的分支顺序。
+// 时间显示分支顺序：
 // 1) 数据源 date     → 发布时间
 // 2) 非已发布状态     → 更新时间
 // 3) 更新时间 > 发布时间 → 文案用更新时间+「更新」，tooltip 仍为发布时间+「发布」
@@ -43,7 +43,7 @@ if ($time_source === 'date') {
 	$rel_label = __('发布', 'jio');
 	$abs_fmt = $published_title;
 } elseif (!$is_published) {
-	// 2) 草稿/待审等：参考固定展示更新时间。
+	// 2) 草稿/待审等：固定展示更新时间。
 	$time_mysql = $modified_mysql;
 	$rel_label = __('更新', 'jio');
 	$abs_fmt = $modified_title;
@@ -78,7 +78,7 @@ $name_html = jio_get_user_name([
 ]);
 $follow_html = jio_get_user_follow('px12-sm ml10 follow but c-red', $author_id);
 $reward_button = get_current_user_id() !== $author_id && function_exists('jio_get_rewards_button')
-	? jio_get_rewards_button($author_id, 'ml6 but c-yellow px12-sm', get_the_ID())
+	? jio_get_rewards_button($author_id, 'ml6 but c-blue px12-sm', get_the_ID())
 	: '';
 ?>