Improved onboarding, dashboards, and billing overhaul for smoother first‑run setup and upgrades

Tiered sub‑agent architecture and new json‑renderer chat with skills (/) and connector mentions (@) for smarter, more controllable dashboards

New UX and navigation, headers, and chat sidesheets across the app

New homepage insights chat experience with dashboard planning

New dashboard creation chat experience which flows into refinement

Updated package names, prices, and limits