SaaS Dashboard & Admin Panel Skill

App shell structure

(app)/
├── layout.tsx          # persistent sidebar + topbar
├── dashboard/page.tsx  # overview: KPI cards + recent activity
├── [resource]/
│   ├── page.tsx         # list view (data table)
│   └── [id]/page.tsx    # detail/edit view
└── settings/

Sidebar nav collapses to icons-only or a drawer below lg; persist collapsed/expanded state client-side. Topbar carries search, notifications, and the user/org switcher — not primary navigation.