chore: go fixes

integrations/jikan/client.go

@@ -316,10 +316,7 @@ func (c *Client) fetchWithRetry(ctx context.Context, urlStr string, out any) err
 
 			if retryable && attempt < maxRetries-1 {
 				resp.Body.Close()
-				delay := retryDelay(attempt)
-				if retryAfter > delay {
-					delay = retryAfter
-				}
+				delay := max(retryAfter, retryDelay(attempt))
 
 				if retryErr := waitForRetry(ctx, delay); retryErr != nil {
 					return retryErr

integrations/jikan/types.go

@@ -100,16 +100,16 @@ func (a Anime) ShortDuration() string {
 		return ""
 	}
 	// Duration format: "23 min per ep" or "1 hr 30 min"
-	var num string
+	var num strings.Builder
 	for _, c := range a.Duration {
 		if c >= '0' && c <= '9' {
-			num += string(c)
-		} else if c == ' ' && num != "" {
+			num.WriteString(string(c))
+		} else if c == ' ' && num.String() != "" {
 			break
 		}
 	}
-	if num != "" {
-		return num + "m"
+	if num.String() != "" {
+		return num.String() + "m"
 	}
 	return a.Duration
 }