src/app/
├── layout.tsx              # Root layout
├── page.tsx                # /
├── loading.tsx             # Global loading state
├── error.tsx               # Global error boundary
├── not-found.tsx           # Global 404
├── about/
│   └── page.tsx            # /about
├── blog/
│   ├── layout.tsx          # Blog layout
│   ├── page.tsx            # /blog
│   └── [slug]/
│       ├── page.tsx        # /blog/:slug
│       ├── loading.tsx     # Loading state for blog posts
│       └── opengraph-image.tsx  # Dynamic OG image
├── dashboard/
│   ├── layout.tsx          # Dashboard layout (sidebar nav)
│   ├── page.tsx            # /dashboard
│   ├── error.tsx           # Error boundary for dashboard
│   ├── analytics/
│   │   └── page.tsx        # /dashboard/analytics
│   └── settings/
│       └── page.tsx        # /dashboard/settings
├── docs/
│   └── [[...slug]]/
│       └── page.tsx        # /docs, /docs/*, /docs/*/*
└── api/
    └── users/
        ├── route.ts        # GET/POST /api/users
        └── [id]/
            └── route.ts    # GET/PUT/DELETE /api/users/:id