🐛: fix timer drop to negative if reset time is 0

src/components/Battleground/Timer.vue

@@ -18,9 +18,10 @@
       startTimer: function () {
         this.stopTimer()
         this.timerIntervalId = setInterval(() => {
-          this.currentTime--
           if (this.currentTime === 0) {
             this.stopTimer()
+          } else {
+            this.currentTime--
           }
         }, 1000)
       },