tranquilitybase07

Design conventions and component vocabulary for building or revamping any dashboard UI in the BillingOS web app (apps/web). Use this WHENEVER the work touches a dashboard page, form, settings panel, table, card layout, tabs, or any merchant-facing screen under /dashboard — including new pages, redesigns, "make this look better / less cluttered", or "this form looks weird". Covers which repo components to reach for (PillTabs, CardFlat, the shared Input), elevation/border rules, progressive disclosure, empty states, and the popover/modal/toast decision. Reach for it even when the user doesn't say "design" — if you're about to add or restyle dashboard UI, read this first so the result matches the rest of the app instead of drifting.