feat(web): show engine code in summary for all decode sources

The collapsed summary's "Motor kodu" read only PL24's rawData.engineCode, so it
was blank for emex/pcat/vin-api. Resolve it per source: PL24 engineCode, emex
parsedOptions.engine_type, vin-api engineModel, or the pcat "engine" parameter.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/web/src/routes/dashboard/vehicles_/$id/index.tsx

@@ -426,12 +426,25 @@ function VehicleAttributes({ vehicle }: { vehicle: any }) {
   );
 }
 
+/** The engine code lives in a different spot per decode source. */
+function getEngineCode(vehicle: any): string | undefined {
+  const rd = vehicle?.rawData;
+  if (rd?.engineCode) return rd.engineCode; // pl24
+  if (rd?.parsedOptions?.engine_type) return rd.parsedOptions.engine_type; // emex
+  if (rd?.engineModel) return rd.engineModel; // vin-api
+  // pcat — the "engine" parameter.
+  const param = rd?.pcatCar?.parameters?.find(
+    (p: any) => p?.key === "engine" || p?.name === "Engine",
+  );
+  return param?.value ? String(param.value) : undefined;
+}
+
 /** Compact at-a-glance fields shown on the collapsed Araç Bilgileri header. */
 function VehicleSummary({ vehicle }: { vehicle: any }) {
   const fields = [
     { label: "Model", value: vehicle?.model },
     { label: "Model yılı", value: vehicle?.year },
-    { label: "Motor kodu", value: vehicle?.rawData?.engineCode },
+    { label: "Motor kodu", value: getEngineCode(vehicle) },
   ].filter((f) => f.value != null && f.value !== "");
 
   if (fields.length === 0) return null;