feat(oms-task-list): simplify filter logic

Simplify the task list filter logic by using a cleaner object literal approach
instead of nested properties. This improves readability and maintainability of
the filtering conditions.

Ref: #5072

libs/oms/shared/task-list/src/lib/return-task-list/return-task-list.component.ts

@@ -80,11 +80,10 @@ export class ReturnTaskListComponent {
       const processId = this.processId();
       const appearance = this.appearance();
       if (processId) {
+        const filter: Record<string, unknown> =
+          appearance === 'review' ? { eob: true } : { completed: false };
         const queryToken: QueryTokenInput = {
-          filter: {
-            completed: false,
-            eob: appearance === 'review' ? true : false,
-          },
+          filter,
         };
 
         untracked(() =>