News: default caption and clickable category badge

Two small but easy-to-miss gaps found while building the news templates, both traced through e107_plugins/news/news.php and e107_core/shortcodes/batch/news_shortcodes.php on e107 core master.

1. Missing heading on the plain news listing

Symptom: the page/sidebar layout's <h2 class="page-title"> (fed by the {---CAPTION---} magic shortcode) is empty on news.php with no query — but works on category/tag listings.

Cause: {---CAPTION---} is only populated when isset($mainRenders[0]['caption']) is true (e_render_class.php::getMagicShortcodes()). isset() returns false for a null value. Upstream's own news_template.php deliberately sets:

$NEWS_TEMPLATE['default']['caption'] = null; // add a value to use tablerender()

— the comment is a direct instruction to theme authors: supply a real value, upstream won't guess one for the unfiltered front listing.

Category and tag listings don't have this problem because they go through a completely different, older mechanism: news.php builds $NEWSLISTTITLE by string-replacing {NEWSCATEGORY} inside the list style's caption template value, then passes the already-built string to tablerender() — never null. This theme's news_template.php already had '{NEWSCATEGORY}' in the list caption, so category/tag pages were never actually affected by this bug.

Fix — give the default style a real caption:

$NEWS_TEMPLATE['default']['caption'] = defset('LAN_PLUGIN_NEWS_NAME', 'News');

For a category or tag listing, the caption already fills in the category or tag name automatically — no {NEWS_CATEGORY} needed there. That substitution is a plain {NEWSCATEGORY} shortcode (no underscore) purely inside the list style's caption string, unrelated to the magic shortcode mechanism above.

2. Category badge not clickable

Symptom: the category badge on listing cards ({NEWS_CATEGORY_NAME}) renders correctly but isn't a link.

Cause: not a deliberate SEO choice — an oversight. The plain {NEWS_CATEGORY_NAME} shortcode only returns text:

function sc_news_category_name($parm=null)
{
    if(empty($parm['link']) && isset($this->news_item['category_name']))
    {
        return e107::getParser()->toHTML($this->news_item['category_name'], 'TITLE');
    }
    return $this->sc_newscategory($parm); // link=1 delegates here
}

{NEWS_CATEGORY_NAME: link=1} does produce a link — but sc_newscategory() builds the whole <a href="...">Name</a> itself, with no class= parameter (only an inline-style hook via catlink). That makes it unusable for a Tabler badge class directly.

Fix — use the two single-purpose shortcodes together instead, keeping full control of the markup:

<a href="{NEWS_CATEGORY_URL}" class="badge text-bg-primary">{NEWS_CATEGORY_NAME}</a>

{NEWS_CATEGORY_URL} returns just the URL (null if the item has no category — the href then simply renders empty, a negligible edge case since every news item has a category).

Applied everywhere the category badge appears: the default style item in news_template.php and the shared card partial in news_grid_template.php. See News checklist for the live-verification status of this fix.