Remove placeholders and finalize contact details for launch

- Replace all `[PLACEHOLDER]` entries across legal pages with actual values
- Update privacy policy with ICO registration status and service provider details (Ionos, Vonage, OneSignal)
- Finalize contact email as `hello@fuel-alert.co.uk` throughout legal pages and footer
- Update legal layout to use full landing nav with auth/guest actions
- Add Umami analytics script to main app layout
- Remove "Fleet" nav link from landing navigation
- Add feature test to enforce no placeholders and correct contact domain remain in legal pages

resources/views/legal/refund.blade.php

@@ -52,7 +52,7 @@
         <p>You can cancel a subscription in either of these ways:</p>
         <ul class="list-disc space-y-1 pl-6">
             <li>From your account: <strong>Settings &rarr; Subscription &rarr; Cancel</strong>.</li>
-            <li>By emailing <a href="mailto:[PLACEHOLDER: hello@fuelalert.co.uk]" class="text-accent underline">[PLACEHOLDER: hello@fuelalert.co.uk]</a> from the address on your account.</li>
+            <li>By emailing <a href="mailto:hello@fuel-alert.co.uk" class="text-accent underline">hello@fuel-alert.co.uk</a> from the address on your account.</li>
         </ul>
         <p>
             Unless you are exercising the 14-day right above, cancellation takes effect at the end
@@ -104,7 +104,7 @@
         <h2 class="font-display text-2xl font-bold text-zinc-900">8. Contact</h2>
         <p>
             For refund or cancellation queries, email
-            <a href="mailto:[PLACEHOLDER: hello@fuelalert.co.uk]" class="text-accent underline">[PLACEHOLDER: hello@fuelalert.co.uk]</a>.
+            <a href="mailto:hello@fuel-alert.co.uk" class="text-accent underline">hello@fuel-alert.co.uk</a>.
         </p>
     </section>
 </x-layouts.legal>