feat: use cached anime data for recommendations to show english titles when possible

internal/jikan/recommendations.go

@@ -50,9 +50,15 @@ func (c *Client) GetRecommendations(animeID int, limit int) ([]Anime, error) {
 	for i := 0; i < max; i++ {
 		rec := result.Data[i]
 
-		// Map the recommendation data directly into an Anime struct.
-		// By doing this locally, we avoid N additional rate-limited API calls
-		// which was destroying the Jikan limit buckets.
+		// Try to see if we already have the full anime details in our local cache.
+		// If we do, we can use it to get the English title without making an API call!
+		var fullAnime Anime
+		animeCacheKey := fmt.Sprintf("anime:%d", rec.Entry.MalID)
+
+		if c.getCache(animeCacheKey, &fullAnime) {
+			animes = append(animes, fullAnime)
+		} else {
+			// Otherwise, map the basic recommendation data directly into an Anime struct.
 			anime := Anime{
 				MalID: rec.Entry.MalID,
 				Title: rec.Entry.Title,
@@ -71,9 +77,9 @@ func (c *Client) GetRecommendations(animeID int, limit int) ([]Anime, error) {
 					},
 				},
 			}
-
 			animes = append(animes, anime)
 		}
+	}
 
 	c.setCache(cacheKey, animes, time.Hour*24)
 	return animes, nil