Remove prediction API endpoint and integrate into stations search

Consolidate prediction functionality by merging /api/prediction endpoint into /api/stations response. Move prediction logic from PredictionController into StationController, returning prediction data alongside station results. Replace usePrediction composable with unified useStations that returns {stations, meta, prediction}. Remove PredictionRequest, related tests, and unused Vue components (FuelFinderTest, MapTest, RecommendationTest, StationListTest). Add PredictionFull component and UpsellBanner. Extend NationalFuelPredictionService to include weekly_summary (7-day series, yesterday/today averages, cheapest/priciest days) and oil signal from price_predictions table. Update Home.vue to consume prediction from stations response. Add Plan::resolveCadenceForUser helper and configure Cashier to use custom Subscription model.

resources/js/components/StationCard.vue

@@ -57,7 +57,7 @@
             leave-to-class="opacity-0"
         >
             <div v-if="expanded" class="border-t border-zinc-200 pt-3 space-y-3">
-                <p v-if="brandLabel" class="text-[10px] font-black uppercase tracking-widest text-zinc-500">
+                <p v-if="brandLabel" class="font-mono text-[10px] uppercase tracking-widest text-zinc-500 mb-1 truncate">
                     {{ brandLabel }}
                 </p>