next16-local-guidance

name	next16-local-guidance
description	Use before changing Next.js App Router, route handlers, server rendering, auth, or testing patterns in this repository.

Next 16 Local Guidance

• Read the relevant guide in node_modules/next/dist/docs/ before writing Next.js code.
• Use App Router conventions under src/app.
• Keep route handlers under src/app/api/**/route.ts and declare runtime = "nodejs" when they touch SQLite.
• Keep / public and unauthenticated; put authenticated campaign operations under /admin.
• Prefer server-rendered initial session data over client effects for first-load auth state.
• Run npm test, npm run typecheck, npm run lint, and npm run build before completion.