Brighton have completed their first signing of the summer and sprayed a rumored club record fee of £ 22 million to bring in Zambian midfielder Enock Mwepu from Red Bull Salzburg.The 23-year-old has been tracked by some of the biggest clubs in Europe, including Liverpool, thanks to his performances in an all-conquering Salzburg side, as well as shining on the biggest stage in the Champions League.However, it is the seagulls that have struggled to strengthen their alternatives in the middle of the park, where Graham Potter has…