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/app.blade.php

@@ -6,6 +6,12 @@
     <meta name="csrf-token" content="{{ csrf_token() }}">
     <title>{{ __('Welcome') }} - {{ config('app.name', 'Laravel') }}</title>
     <meta name="description" content="Live UK fuel prices across 11,000+ stations. See whether to fill up today or wait, based on local trends.">
+    <script
+            defer src="https://umami.local.uovidiu.com/script.js"
+            data-website-id="26b2df00-e3fc-4c8c-97d1-75d99daa4545"
+            data-do-not-track="true"
+            data-domains="fuel-alert.co.uk,www.fuel-alert.co.uk"
+    ></script>
     <script>
         window['FUEL_TYPES'] = @json(
             collect(App\Enums\FuelType::cases())