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/js/views/Home.vue

@@ -372,6 +372,9 @@
                     <p class="text-sm text-zinc-500 leading-relaxed">
                         Helping UK drivers save money at the pump. Real-time data, smarter choices.
                     </p>
+                    <p class="text-sm text-zinc-500">
+                        Questions? <a class="text-accent hover:underline" href="mailto:hello@fuel-alert.co.uk">hello@fuel-alert.co.uk</a>
+                    </p>
                     <div class="flex gap-4">
                         <iconify-icon class="text-2xl text-zinc-500 hover:text-accent cursor-pointer transition-colors" icon="mdi:twitter"></iconify-icon>
                         <iconify-icon class="text-2xl text-zinc-500 hover:text-accent cursor-pointer transition-colors" icon="mdi:facebook"></iconify-icon>