fix(timeline-event): fixed overflowed buttons, event expansion on focus

app/src/plugins/tm@modal/task/z-task-modal.vue

@@ -175,7 +175,7 @@
               v-for="(employee, index) in subtask.employees"
               :key="`employee-${index}`"
               class="splitted-inputs remove-employee"
-              :class="{ 'hide-arrow': employee.id }"
+              :class="{ 'hide-arrow': employee?.id }"
             >
               <v-autocomplete
                 :custom-filter="customFilter"
@@ -854,7 +854,7 @@ export default {
 
         const lastEmployee =
           this.subtask.employees[this.subtask.employees.length - 1];
-        if (lastEmployee.id || lastEmployee.duration)
+        if (lastEmployee?.id || lastEmployee?.duration)
           this.subtask.employees.push({});
       },
       deep: true,