message: fix: Compatible with The value of leftTime is 0
diff: @@ -57,7 +57,7 @@ If both `leftTime` and `targetDate` are passed, the `targetDate` is ignored, the
  | Property | Description | Type | Default |
  | ---------- | -------------------------------------------- | ------------ | ------- |
  -| leftTime | Rest time, in milliseconds | `number` | - |
  +| leftTime | The rest of time, in milliseconds | `number` | - |
  | targetDate | Target time | `TDate` | - |
  | interval | Time interval between ticks, in milliseconds | `number` | `1000` |
  | onEnd | Function to call when countdown completes | `() => void` | - |
  