fix(z-task-modal): ensure employee array checks in draft handling and improve timeblock update logic

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

@@ -88,7 +88,7 @@ export default {
 
     normalizedEmployees() {
       // Drafts always have employees array
-      if (this.subtask.is_draft) {
+      if (this.subtask.is_draft && Array.isArray(this.subtask.employees)) {
         return this.subtask.employees
           .filter((emp) => emp.id) // Filter out empty employee slots
           .map((emp) => ({