conversationFlow saveConfig():
- Was not serializing buttons[] array for button-type menus (would erase
all buttons on save). Now sends menu_btn_id/menu_btn_title like botConfig.
- Defaulted menu type to 'list' instead of 'button'.
conversationFlow addNew('menu') modal:
- Defaulted to 'list' with header/footer/button fields.
- Now defaults to 'button' with inline buttons editor; toggle via type select.
- saveNewMenu() creates correct {type,body,buttons} or {type,...,sections}.
conversationFlow orphan-flow detection:
- Only checked sections[].rows, so flows linked via button menus appeared
as orphaned. Now checks buttons[] array for button-type menus.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
