fix individual task time progress starting from 1970.

svelte-ui/src/pages/FrontPage.svelte

@@ -52,6 +52,7 @@
     }
 
     if (fakeProject.tasks.length > 0) {
+      fakeProject.createdTime = fakeProject.tasks.map(t => t.createdTime).sort()[0];
       fakeProject.endTime = fakeProject.tasks[0].endTime;
     }
   }