refactor(task-modal): enhance timeblock loading and rendering logic with validation and improved display conditions

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

@@ -857,12 +857,21 @@ export default {
               // Load timeblocks from localStorage if they exist
               if (savedTimeblocks) {
                 try {
-                  const parsedTimeblocks = JSON.parse(savedTimeblocks);
+                  let parsedTimeblocks = JSON.parse(savedTimeblocks);
+
+                  // Filter out timeblocks that are not valid
+                  parsedTimeblocks = parsedTimeblocks.filter(
+                    (tb) =>
+                      tb.employee_id && tb.starts_at_time && tb.ends_at_time,
+                  );
+
                   if (Array.isArray(parsedTimeblocks)) {
                     this.timeblocks = parsedTimeblocks.map((tb) => ({
                       ...tb,
                       date: tb.date ? new Date(tb.date) : null,
                     }));
+                  } else {
+                    this.timeblocks = [];
                   }
                 } catch (e) {
                   console.error('Error parsing saved timeblocks:', e);
@@ -897,6 +906,17 @@ export default {
             this.subtask.employees = [employee];
             this.subtask.deadline = subtask.deadline;
             this.subtask._deadline_time = subtask._deadline_time;
+
+            setTimeout(() => {
+              this.timeblocks = [
+                {
+                  date: new Date(subtask.deadline),
+                  starts_at_time: subtask._deadline_time,
+                  ends_at_time: null,
+                  employee_id: subtask.employee_id,
+                },
+              ];
+            }, 500);
           }
 
           if (subtask?.master_task_id && subtask?.project_code) {