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>

inc/helpers/jio-rewards.php

@@ -25,6 +25,17 @@ if (!function_exists('jio_get_rewards_button')) {
 		$settings = \Jio\Settings\Settings::get_post_page_settings();
 		$label = (string) ($settings['rewards_btn_text'] ?? __('赞赏', 'jio'));
 		$icon = function_exists('jio_icon_markup') ? jio_icon_markup('jiosvg-money') : '';
+
+		// 站内余额赞赏必须登录；游客点按钮直接拉起登录弹窗，不在提交后才报错。
+		if (!is_user_logged_in()) {
+			return sprintf(
+				'<a href="javascript:;" class="%1$s signin-loader">%2$s<text>%3$s</text></a>',
+				esc_attr($class),
+				$icon, // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped -- fixed sprite markup.
+				esc_html($label)
+			);
+		}
+
 		$template_id = 'jio-reward-template-' . $user_id . '-' . $post_id;
 		return sprintf(
 			'<button type="button" class="%1$s jio-reward-open" data-jio-reward-open data-template-id="%2$s" data-user-id="%3$d" data-post-id="%4$d">%5$s<text>%6$s</text></button>',
@@ -42,7 +53,7 @@ if (!function_exists('jio_render_rewards_template_for_user')) {
 	function jio_render_rewards_template_for_user(int $user_id, int $post_id = 0): void {
 		static $done = [];
 		$key = $user_id . ':' . $post_id;
-		if ($user_id <= 0 || isset($done[$key]) || !jio_rewards_enabled()) {
+		if ($user_id <= 0 || isset($done[$key]) || !jio_rewards_enabled() || !is_user_logged_in()) {
 			return;
 		}
 		$done[$key] = true;