Scheduler - Fix TypeScript error in appointment_popup.integration.test

[aleksei-semikozov]

No description provided.

[Copilot]

Pull request overview

Fixes a TypeScript compile error in the Scheduler appointment popup integration test by avoiding direct indexing into a possibly-undefined dxForm.option('items') result.

Changes:

• Replaces a @ts-expect-error and direct option('items')[1] access with a null-safe retrieval of form items.
• Keeps the recurrence group extraction logic working while satisfying TypeScript’s type checking.

[Copilot]

formItems[1] as GroupItem still relies on a positional index and an unchecked cast. Since the recurrence group has a stable name (recurrenceGroup) in the form items, it would be more robust to locate it by name (e.g., via dxForm.itemOption('recurrenceGroup') or find(i => i.name === 'recurrenceGroup')) and add an explicit assertion if it isn’t found, so failures are clearer than a runtime Cannot read properties of undefined when accessing recurrenceGroup.items.

Suggested change

	const recurrenceGroup = formItems[1] as GroupItem;
	const allItems = flattenBy<SimpleItem>(
	recurrenceGroup.items as SimpleItem[],
	const recurrenceGroup = formItems.find(
	(item): item is GroupItem => item.name === 'recurrenceGroup' && 'items' in item,
	);
	if (!recurrenceGroup) {
	throw new Error('The recurrenceGroup item was not found in the appointment popup form items.');
	}
	const allItems = flattenBy<SimpleItem>(
	(recurrenceGroup.items ?? []) as SimpleItem[],