Module overrides with showtitle, suffix, and header_tag support + CSS

New default.php overrides for 11 Joomla core modules:
- mod_custom (default + updated hero layout)
- mod_articles_latest, mod_articles_popular, mod_articles_news
- mod_articles_category, mod_breadcrumbs, mod_footer
- mod_login (BS5 form with FA7 icons), mod_finder (BS5 search)
- mod_tags_popular (badge layout), mod_tags_similar, mod_related_items

All overrides consistently respect:
- $module->showtitle — renders title only when enabled
- header_tag param — configurable heading level (h1-h6)
- header_class param — custom CSS class on the title
- moduleclass_sfx — custom suffix class on the wrapper

CSS additions in template.css:
- Shared __title styles for all module headings
- List styling for article/tag/related modules
- Newsflash card layout, tag badges, search form, login form
- Breadcrumb and footer module styling

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/html/mod_footer/default.php

@@ -0,0 +1,30 @@
+<?php
+/**
+ * Copyright (C) 2025 Moko Consulting <hello@mokoconsulting.tech>
+ *
+ * This file is part of a Moko Consulting project.
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+/**
+ * Default layout override for mod_footer.
+ * Adds showtitle support and respects module settings.
+ */
+
+defined('_JEXEC') or die;
+
+use Joomla\CMS\Language\Text;
+
+$suffix      = htmlspecialchars($params->get('moduleclass_sfx', ''), ENT_COMPAT, 'UTF-8');
+$headerTag   = htmlspecialchars($params->get('header_tag', 'h3'), ENT_COMPAT, 'UTF-8');
+$headerClass = htmlspecialchars($params->get('header_class', ''), ENT_COMPAT, 'UTF-8');
+?>
+<div class="mod-footer<?php echo $suffix ? ' ' . $suffix : ''; ?>">
+    <?php if ($module->showtitle) : ?>
+        <<?php echo $headerTag; ?> class="mod-footer__title<?php echo $headerClass ? ' ' . $headerClass : ''; ?>"><?php echo $module->title; ?></<?php echo $headerTag; ?>>
+    <?php endif; ?>
+    <div class="mod-footer__content">
+        <?php echo $module->content; ?>
+    </div>
+</div>