Cleanup: fix 2,659 dead internal URLs, repair canonicals, drop dead host leftovers

No visible change — links, canonicals and dead tags only.

- 155 path rewrites (case drift from the provider move): /Odoo-Hosting/ ->
  /odoo-hosting/, /odoo-ai/ -> /odoo-ia/, /Odoo/... -> /odoo/...; applied in
  href/src, og:url and JSON-LD alike. The origin is case-sensitive, so these
  were live 404s.
- canonicals: 93 pointed at a case variant that 404s, 43 pointed at a path that
  no longer exists; the first now point at the real URL, the second are
  self-canonical. Cross-locale canonicals were left alone (strategy, not a bug).
- removed 1,197 dead <link rel=alternate icon href=/favicon.ico> (file never
  existed), 96 dead /styles/*.css links (Next.js leftovers) and 3
  /_vercel/insights scripts (previous host's analytics).
- deleted unused duplicates: index-optimized.html, index-performance.html,
  add-performance.html, a 2.1 MB duplicate portrait, and the old build scripts
  (server-upstash*.js, server-optimized.js, minify-assets.js, optimize-all.js,
  fix-canonicals.ps1).

broken internal links: 4,029 -> 1,370 occurrences.

de/odoo-hosting/odoo-hosting-deutschland-2026/index.html

@@ -6,8 +6,7 @@
     <meta charset="UTF-8">
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <link rel="icon" type="image/svg+xml" href="/favicon.svg">
-    <link rel="alternate icon" href="/favicon.ico">
-    <title>Odoo Hosting Deutschland 2026 | Odoo Expertos</title>
+<title>Odoo Hosting Deutschland 2026 | Odoo Expertos</title>
 
     <meta name="description" content="Der ultimative Leitfaden zu Odoo Hosting in Deutschland 2026. Vergleich von 15+ Anbietern: Hetzner, Contabo, IONOS und mehr. DSG - Odoo Hosting Deutschland 2026 | DE">
     <meta name="keywords" content="odoo hosting deutschland, odoo hosting anbieter, hetzner odoo, contabo odoo, odoo cloud hosting deutschland, odoo server deutschland, dsgvo odoo hosting, managed odoo hosting">
@@ -805,7 +804,7 @@
     </script>
 </head>
 <body>
-    <div id="header"><header class="site-header"><nav class="navbar"><div class="container"><div class="nav-brand"><a href="/de/" class="logo"><span class="logo-text">Odoo Expertos</span></a></div><button class="nav-toggle" aria-label="Toggle navigation"><span></span><span></span><span></span></button><div class="nav-menu"><ul class="nav-list"><li><a href="/de/">Start</a></li><li><a href="/de/odoo/">Odoo</a></li><li><a href="/de/odoo-ia/">Odoo KI</a></li><li><a href="/de/odoo-hosting/">Odoo Hosting</a></li><li><a href="/de/mapa-del-sitio/">Sitemap</a></li></ul></div></div></nav></header></div><button class="nav-toggle" aria-label="Toggle navigation"><span></span><span></span><span></span></button><div class="nav-menu"><ul class="nav-list"><li><a href="/de/">Start</a></li><li><a href="/de/odoo/">Odoo</a></li><li><a href="/de/odoo-ia/">Odoo KI</a></li><li><a href="/de/odoo-hosting/">Odoo Hosting</a></li><li><a href="/de/mapa-del-sitio/">Sitemap</a></li></ul></div></div></nav></header></div>
+    <div id="header"><header class="site-header"><nav class="navbar"><div class="container"><div class="nav-brand"><a href="/de/" class="logo"><span class="logo-text">Odoo Expertos</span></a></div><button class="nav-toggle" aria-label="Toggle navigation"><span></span><span></span><span></span></button><div class="nav-menu"><ul class="nav-list"><li><a href="/de/">Start</a></li><li><a href="/de/odoo/">Odoo</a></li><li><a href="/de/odoo-ia/">Odoo KI</a></li><li><a href="/de/odoo-hosting/">Odoo Hosting</a></li><li><a href="/mapa-del-sitio/">Sitemap</a></li></ul></div></div></nav></header></div><button class="nav-toggle" aria-label="Toggle navigation"><span></span><span></span><span></span></button><div class="nav-menu"><ul class="nav-list"><li><a href="/de/">Start</a></li><li><a href="/de/odoo/">Odoo</a></li><li><a href="/de/odoo-ia/">Odoo KI</a></li><li><a href="/de/odoo-hosting/">Odoo Hosting</a></li><li><a href="/mapa-del-sitio/">Sitemap</a></li></ul></div></div></nav></header></div>
 
     <!-- Breadcrumbs -->
     <nav class="breadcrumbs">
@@ -1432,7 +1431,7 @@
         </div>
     </section>
 
-    <div id="footer"><footer class="site-footer"><div class="container"><div class="footer-cols"><div><strong>Odoo Expertos</strong></div><nav class="footer-nav"><a href="/de/">Start</a><a href="/de/odoo/">Odoo</a><a href="/de/odoo-ia/">Odoo KI</a><a href="/de/odoo-hosting/">Odoo Hosting</a><a href="/de/mapa-del-sitio/">Sitemap</a></nav></div><div class="footer-bottom"><small>&copy; 2026 Odoo Expertos</small></div></div></footer></div><nav class="footer-nav"><a href="/de/">Start</a><a href="/de/odoo/">Odoo</a><a href="/de/odoo-ia/">Odoo KI</a><a href="/de/odoo-hosting/">Odoo Hosting</a><a href="/de/mapa-del-sitio/">Sitemap</a></nav></div><div class="footer-bottom"><small>&copy; 2026 Odoo Expertos</small></div></div></footer></div>
+    <div id="footer"><footer class="site-footer"><div class="container"><div class="footer-cols"><div><strong>Odoo Expertos</strong></div><nav class="footer-nav"><a href="/de/">Start</a><a href="/de/odoo/">Odoo</a><a href="/de/odoo-ia/">Odoo KI</a><a href="/de/odoo-hosting/">Odoo Hosting</a><a href="/mapa-del-sitio/">Sitemap</a></nav></div><div class="footer-bottom"><small>&copy; 2026 Odoo Expertos</small></div></div></footer></div><nav class="footer-nav"><a href="/de/">Start</a><a href="/de/odoo/">Odoo</a><a href="/de/odoo-ia/">Odoo KI</a><a href="/de/odoo-hosting/">Odoo Hosting</a><a href="/mapa-del-sitio/">Sitemap</a></nav></div><div class="footer-bottom"><small>&copy; 2026 Odoo Expertos</small></div></div></footer></div>
 
     <!-- Scripts -->
     <script src="/js/language-router.js"></script>