Hide TotalHours when no billed hours

src/screens/hours/components/TotalHours/TotalHours.tsx

@@ -14,14 +14,20 @@ interface TotalHoursProps {
   timeItems: TaskTimeItemModel[];
 }
 
-export default observer(function TotalHours({ timeItems }: TotalHoursProps) {
+const TotalHours = observer((props: TotalHoursProps) => {
+  const { timeItems } = props;
+
   const { durationMs, gapsMs } = TaskHooks.useTimeItemsDuration(timeItems);
   const startWorkingTime = TaskHooks.useStartWorkingTime(timeItems);
   const estimatedWorkingTimeEnd = estimateWorkingTimeEnd(
     startWorkingTime,
     gapsMs
   );
 
+  if (!timeItems.length) {
+    return null;
+  }
+
   return (
     <Space>
       <span>{getTime(startWorkingTime)}</span>
@@ -31,3 +37,5 @@ export default observer(function TotalHours({ timeItems }: TotalHoursProps) {
     </Space>
   );
 });
+
+export default TotalHours;