Let the daily update suggest follow-ups from a WhatsApp group or starred messages

Let the daily update draw its follow-up suggestions from WhatsApp signals the user already maintains — a group chat they keep as a to-contact list, or the messages they star.

Current gap: WhatsApp sync creates one "WhatsApp Contacts" group and imports people as individual contacts, so a WhatsApp group's own name is never visible in Dex and cannot be referenced in the daily update. Starred messages are not read at all. The daily digest's sections are fixed, so there is no way to add a chosen set of people to it.

Desired outcome:

• Pick a WhatsApp group (by its WhatsApp name) and have its members appear in the daily update as suggested follow-ups.
• Have messages starred in WhatsApp surface in Dex — at minimum on the contact, ideally as follow-up candidates.
• More generally: let a user-chosen group be one of the daily update's sources, rather than the fixed section list it has today.