NEXT_DEV_PROFILE=codeserver wires basePath, assetPrefix, and
allowedDevOrigins from CODESERVER_HOST/PORT in .env.local. Use
/absproxy/{port} so code-server preserves the path prefix and Next's
basePath matches the incoming request.
Run with `npm run dev:codeserver` and access via
https://<host>/absproxy/<port>/.
Master page now embeds a separate playing card so the host can play along
while drawing numbers. Extracted shared grid logic into a reusable
PlayerBoard component with a configurable storage prefix.
Show animated congrats when all 5 numbers in a row are crossed.
Show "Chờ [number]" toast overlay when 4/5 crossed. Auto-fades
after 5s or dismissible by tap.
Replace vanilla HTML/JS/CSS with Next.js App Router, TypeScript,
and Tailwind CSS. Responsive design with dark mode support.
All original game logic preserved: grid generation, click-to-cross,
localStorage persistence.
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