Refactor ChainFormPage and challenge types to use 'taskIds' instead of 'tasks' for improved clarity and consistency in data handling.

src/pages/chains/ChainFormPage.tsx

@@ -79,7 +79,7 @@ export const ChainFormPage: React.FC = () => {
           id,
           data: {
             name: name.trim(),
-            tasks: taskIds,
+            taskIds: taskIds,
           },
         }).unwrap()
         toaster.create({
@@ -90,7 +90,7 @@ export const ChainFormPage: React.FC = () => {
       } else {
         await createChain({
           name: name.trim(),
-          tasks: taskIds,
+          taskIds: taskIds,
         }).unwrap()
         toaster.create({
           title: t('challenge.admin.common.success'),