Fix when empty hand melee , still play rifle melee animation
修复空手状态近战，却播放步枪近战动画的问题

修改了打击点时间，优化了动画和攻击距离
Modified strike time, optimized animation and attack range

Change the name of the _speed parameter variable to avoid conflicts with other mods or tasks

The over - shoulder perspective is eliminated, the third person hit distance is redefined, and all third person perspectives are theoretically supported