SEO audit fixes: H1 keyword, schema, robots.txt, llms.txt, sitemap, alt texts, logo

- H1: add primary keyword (AI Automation for UK Law Firms & Consultancies)
- Hero subtitle: replace old scraping copy with accurate consultancy copy
- WebPage schema name aligned with title tag
- Organization schema: add telephone, fix sameAs (remove broken social URLs)
- robots.txt: add 5 missing AI crawlers (Applebot-Extended, Bytespider, CCBot, FacebookBot, Amazonbot)
- llms.txt: add Key Pages section with 7 linked pages
- sitemap.xml: add 4 legal pages (privacy, terms, cookie, gdpr)
- Icon alt texts: simplify 6 keyword-stuffed verbose alts
- Nav logo: add width/height dimensions, switch to loading=eager

includes/nav.php

@@ -17,7 +17,7 @@ function nav_active($href, $current) {
     <div class="nav-container">
         <div class="nav-logo">
             <a href="/">
-                <img src="/assets/images/ukaiautomation-logo.svg" alt="UK AI Automation" class="logo" style="height:56px;width:auto;">
+                <img src="/assets/images/ukaiautomation-logo.svg" alt="UK AI Automation" class="logo" width="200" height="56" loading="eager">
             </a>
         </div>
         <div class="nav-menu" id="nav-menu">