Fix wrong TMDB field for person profile images in search

Person results from multi-search were using poster_path instead of
profile_path, causing missing profile images.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/api/search/route.ts

@@ -86,7 +86,7 @@ export async function GET(req: NextRequest) {
             type: "person" as const,
             title: r.name ?? "Unknown",
             posterPath: null,
-            profilePath: tmdbImageUrl(r.poster_path, "w185"),
+            profilePath: tmdbImageUrl(r.profile_path, "w185"),
             overview: "",
             releaseDate: null,
             popularity: r.popularity,