feat: add location-based search, redesign station cards, and implement URL state management

- Support geolocation search (lat/lng) as alternative to postcode with automatic fallback
- Redesign StationCard with expanded layout showing address, distance in miles, reliability status, directions link, and optional remove button
- Add directions integration with Google Maps including origin parameter support
- Persist search parameters (postcode/coords, fuel type, radius, sort) in URL query and hydrate on mount
- Implement compact map markers with inline directions link and click-to-zoom behavior
- Auto-trigger search when filters change (fuel type, radius, sort) if search already performed
- Add removable prop to StationCard for watchlist integration
- Display reliability status (Current/Stale/Outdated) with color-coded pricing
- Remove 2-mile radius option from search filters

resources/js/components/StationList.vue

@@ -34,6 +34,7 @@
                     v-for="station in reliable"
                     :key="station.station_id"
                     :lowest-price="lowestPrice"
+                    :origin="origin"
                     :station="station"
                 />
             </section>
@@ -80,6 +81,7 @@
                 :key="station.station_id"
                 :station="station"
                 :lowest-price="lowestPrice"
+                :origin="origin"
             />
         </div>
     </div>
@@ -92,6 +94,7 @@ import StationCard from './StationCard.vue'
 const props = defineProps({
     stations: { type: Array, required: true },
     currentSort: { type: String, default: 'reliable' },
+    origin: { type: Object, default: null },
 })
 
 const emit = defineEmits(['sort'])