feat: expand station cards with detailed information and add live statistics endpoint

- Add `/stats/live` endpoint returning station count and latest price timestamp with 5-minute cache
- Transform StationCard into expandable component with click/keyboard interaction showing full details
- Display brand label, badges (24h/Supermarket/Motorway), fuel types, amenities, opening hours, and price delta vs average
- Add brand filter dropdown to StationList with dynamic brand extraction from results
- Calculate and display price comparison against filtered stations average
- Redesign map markers to simpler price display; move directions link to popup alongside station details
- Add "locate-me" button to SearchBar for geolocation trigger
- Show "Live" indicator with station count and last-update time on homepage hero
- Remove standalone directions link from marker HTML; consolidate in popup with click propagation handling
- Persist `avgPence` calculation across StationList and pass to cards for delta display
- Add `@iconify-json/lucide` dev dependency and register collection on app mount
- Stop click propagation on card action buttons (directions, remove)

app/Http/Controllers/Api/StationController.php

@@ -74,7 +74,6 @@ class StationController extends Controller
             : $filtered->sortBy(match ($sort) {
                 'price' => fn ($s) => (int) $s->price_pence,
                 'updated' => fn ($s) => $s->price_effective_at ? -strtotime($s->price_effective_at) : PHP_INT_MAX,
-                'brand' => fn ($s) => strtolower((string) $s->brand_name),
                 default => fn ($s) => (float) $s->distance_km,
             })->values();