feat: 优化总充值金额

server/app/Admin/Metrics/Recharge.php

@@ -82,7 +82,7 @@ class Recharge extends Round
             \round($goldPercent*100, 2)
         ];
         $this->withChart($data);
-        $this->chartTotal($this->labels[0], $this->totalRecharge);
+        $this->chartTotal('总充值金额', $this->totalRecharge);
     }