fix: address linter suggestion - use strings.TrimSuffix

Replace if statement with strings.TrimSuffix as suggested by staticcheck (S1017)

Author: jackspirou

svg.go

@@ -1102,9 +1102,7 @@ func formatPercentage(val float64, keyframeCount int) string {
 
 	// Remove trailing zeros but keep at least 1 decimal for consistency
 	formatted = strings.TrimRight(formatted, "0")
-	if strings.HasSuffix(formatted, ".") {
-		formatted = formatted[:len(formatted)-1]
-	}
+	formatted = strings.TrimSuffix(formatted, ".")
 
 	return formatted
 }