feat: rating stars on recipe cards (Search, Explore)

New lib/recipe-ratings.ts helper batches avg score + review count for
a set of recipe ids in one grouped query, kept separate from the main
paginated/sorted search query rather than joining+grouping it directly
(would've forced grouping by every selected column). Wired into
/api/v1/search and the Explore page's trending/recent queries;
SearchResultCard renders the star only when a recipe has at least one
rating.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

apps/web/app/api/v1/search/route.ts

@@ -11,6 +11,7 @@ import {
   sql,
   desc,
 } from "@epicure/db";
+import { getAvgRatingsByRecipeId } from "@/lib/recipe-ratings";
 
 const VALID_DIETARY = ["vegan", "vegetarian", "glutenFree", "dairyFree"] as const;
 type DietaryTag = (typeof VALID_DIETARY)[number];
@@ -143,5 +144,12 @@ export async function GET(req: NextRequest) {
 
   const total = countResult[0]?.total ?? 0;
 
-  return NextResponse.json({ data: rows, total, limit, offset });
+  const ratingByRecipe = await getAvgRatingsByRecipeId(rows.map((r) => r.id));
+  const data = rows.map((r) => ({
+    ...r,
+    avgRating: ratingByRecipe.get(r.id)?.avgRating ?? null,
+    ratingCount: ratingByRecipe.get(r.id)?.ratingCount ?? 0,
+  }));
+
+  return NextResponse.json({ data, total, limit, offset });
 }