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

package.json

@@ -11,10 +11,11 @@
         "@vitejs/plugin-vue": "^6.0.5",
         "autoprefixer": "^10.4.20",
         "axios": "^1.15.0",
-        "concurrently": "^9.0.1",
+        "concurrently": "^10.0.3",
         "iconify-icon": "^3.0.2",
         "laravel-vite-plugin": "^3.0.0",
         "leaflet": "^1.9.4",
+        "shell-quote": "^1.8.4",
         "tailwindcss": "^4.0.7",
         "vite": "^8.0.0",
         "vue": "^3.5.32",