Site improvements: nav refactor, CSS readability, hover fixes, remove unverified badges

- Refactored navigation: all 44 pages now use shared includes/nav.php
- Added Free Tools link to navigation (was missing from 29+ pages)
- CSS readability: darker body text (#333), secondary text (#555), bolder hero subtitle
- CSS: darkened link colour (#148a72) for WCAG AA compliance
- CSS: increased stat label font size to 1rem
- Fixed industry-card hover white-on-white text bug
- Removed ICO Registered and Cyber Essentials claims (not yet registered)
- Cache version bumped to v1.1.2

includes.bak.20260210/includes/breadcrumb-schema.php

@@ -0,0 +1,52 @@
+<?php
+/**
+ * Breadcrumb Schema Component
+ * Generates BreadcrumbList structured data for improved SEO
+ *
+ * Usage: Set $breadcrumbs array before including this file
+ * Example:
+ * $breadcrumbs = [
+ *     ['url' => '/', 'label' => 'Home'],
+ *     ['url' => '/blog', 'label' => 'Blog'],
+ *     ['url' => '', 'label' => 'Current Page Title']
+ * ];
+ */
+
+if (!isset($breadcrumbs) || empty($breadcrumbs)) {
+    return;
+}
+
+$base_url = 'https://ukdataservices.co.uk';
+$items = [];
+
+foreach ($breadcrumbs as $index => $crumb) {
+    $position = $index + 1;
+    $item = [
+        '@type' => 'ListItem',
+        'position' => $position,
+        'name' => $crumb['label']
+    ];
+
+    // Add URL for all items except the last one (current page)
+    if (!empty($crumb['url'])) {
+        $url = $crumb['url'];
+        // Ensure URL is absolute
+        if (strpos($url, 'http') !== 0) {
+            $url = $base_url . $url;
+        }
+        $item['item'] = $url;
+    }
+
+    $items[] = $item;
+}
+
+$schema = [
+    '@context' => 'https://schema.org',
+    '@type' => 'BreadcrumbList',
+    'itemListElement' => $items
+];
+?>
+
+<script type="application/ld+json">
+<?php echo json_encode($schema, JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES); ?>
+</script>