Add file-based Bubble, Stripe, and OpenRouter importers; usage attribution,
cost allocation, pricing simulator, credit wallets, and recommendations in the
dashboard API. Document whynot-design UI workflow and archive the finished
workplan with all ten tasks marked done.
Introduce ui/ dashboard (dark observatory layout), JSON API, and local
dev server. All metrics load from expense and payment record ledgers.
Links Claude design reference for visual alignment.
