Remove obsolete Livewire fuel search components and consolidate pricing tiers

- Delete unused Livewire Search test and fuel type select Blade component
- Move subscription webhook listener from EventServiceProvider to AppServiceProvider
- Add FUEL_TYPES global config to app layout for client-side use
- Add Billable trait to User model and include email_verified_at in fillable
- Implement monthly/annual cadence toggle with pricing display and smart CTA routing on homepage
- Update VerifyApiKeyMiddlewareTest to use e10 instead of petrol
- Refactor PollFuelPrices to auto-refresh stale stations based on last_seen_at
- Add incremental polling with cached timestamp and effective-start-timestamp param to FuelPriceService
- Normalize amenities/fuel_types from API objects to flat arrays, skip stations missing required fields
- Log response body on API failures in ApiLogger
- Default homepage sort to 'reliable' instead of 'price'

resources/js/views/dashboard/Preferences.vue

@@ -9,12 +9,9 @@
                     v-model="form.preferred_fuel_type"
                     class="w-full h-12 px-4 bg-zinc-50 border border-zinc-300 rounded-xl font-medium text-zinc-800 focus:outline-none focus:ring-2 focus:ring-accent"
                 >
-                    <option value="petrol">Petrol (E10)</option>
-                    <option value="diesel">Diesel (B7)</option>
-                    <option value="e5">Premium Unleaded (E5)</option>
-                    <option value="b7_premium">Premium Diesel</option>
-                    <option value="b10">B10 Biodiesel</option>
-                    <option value="hvo">HVO</option>
+                    <option v-for="fuel in FUEL_TYPES" :key="fuel.value" :value="fuel.value">
+                        {{ fuel.label }}
+                    </option>
                 </select>
             </div>
 
@@ -46,14 +43,15 @@
 <script setup>
 import { ref, onMounted } from 'vue'
 import api from '../../axios.js'
+import { FUEL_TYPES } from '../../constants/fuelTypes.js'
 
-const form = ref({ preferred_fuel_type: 'petrol', postcode: '' })
+const form = ref({ preferred_fuel_type: 'e10', postcode: '' })
 const saving = ref(false)
 const saved = ref(false)
 
 onMounted(async () => {
     const response = await api.get('/user/preferences')
-    form.value.preferred_fuel_type = response.data.preferred_fuel_type ?? 'petrol'
+    form.value.preferred_fuel_type = response.data.preferred_fuel_type ?? 'e10'
     form.value.postcode = response.data.postcode ?? ''
 })