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

tests/Feature/LegalPagesTest.php

@@ -52,3 +52,17 @@ it('cross-links between legal pages', function (): void {
     $this->get('/legal/privacy')->assertSee(route('legal.cookies'), false);
     $this->get('/legal/terms')->assertSee(route('legal.refund'), false);
 });
+
+it('is launch-ready: no placeholders and the correct contact domain', function (string $path): void {
+    $response = $this->get($path);
+
+    $response->assertStatus(200);
+    $response->assertDontSee('[PLACEHOLDER', false);
+    $response->assertDontSee('hello@fuelalert.co.uk', false);
+    $response->assertSee('hello@fuel-alert.co.uk', false);
+})->with([
+    '/legal/privacy',
+    '/legal/terms',
+    '/legal/refund',
+    '/legal/cookies',
+]);