feat: add WYSIWYG content editor with card display on hero

- Add heroContent param with Joomla editor field for rich HTML input
- Add showCard toggle to wrap content in a styled card (white bg, shadow, rounded)
- Card CSS: semi-transparent white, 8px radius, centered, max 700px
- Remove old $module->content fallback — content now comes from params
- Language strings for en-GB and en-US (both .ini and .sys.ini)

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

src/tmpl/default.php

@@ -23,6 +23,8 @@ use Joomla\CMS\Language\Text;
 /** @var float  $overlayOpacity */
 /** @var string $textAlign */
 /** @var string $textColor */
+/** @var string $heroContent */
+/** @var bool   $showCard */
 /** @var string $content */
 
 $moduleId = 'mod-mokojoomhero-' . $module->id;
@@ -62,10 +64,14 @@ $heightAttr = htmlspecialchars($heroHeight, ENT_QUOTES, 'UTF-8');
 	<?php // Overlay + content ?>
 	<div class="mokojoomhero__overlay" style="background-color: <?php echo $rgba; ?>;">
 		<div class="mokojoomhero__content" style="text-align: <?php echo htmlspecialchars($textAlign, ENT_QUOTES, 'UTF-8'); ?>; color: <?php echo htmlspecialchars($textColor, ENT_QUOTES, 'UTF-8'); ?>;">
-			<?php if ($content) : ?>
-				<?php echo $content; ?>
-			<?php else : ?>
-				<p><?php echo Text::_('MOD_MOKOJOOMHERO_NO_CONTENT'); ?></p>
+			<?php if ($heroContent) : ?>
+				<?php if ($showCard) : ?>
+					<div class="mokojoomhero__card">
+						<?php echo $heroContent; ?>
+					</div>
+				<?php else : ?>
+					<?php echo $heroContent; ?>
+				<?php endif; ?>
 			<?php endif; ?>
 		</div>
 	</div>