Migrate docs site to Fumadocs with Next.js 16 and React 19

[Copilot]

Migrates the documentation site from the legacy Nextra setup (Next.js 9.4.4, React 16) to Fumadocs with modern dependencies.

Changes

• Framework: Fumadocs (fumadocs-mdx 14.2.3, fumadocs-core 16.4.1, fumadocs-ui 16.4.1)
• Runtime: Next.js 16.0.10, React 19, Tailwind CSS v4
• Content: All existing docs preserved (Introduction, Optimization, Customization, API Reference, Change Log)
• Components: Migrated Features component to TypeScript
• UX improvements: Built-in search, table of contents, dark mode, responsive sidebar

Structure

website/
├── app/
│   ├── docs/[[...slug]]/page.tsx  # Dynamic docs pages
│   ├── layout.tsx                  # Root layout with RootProvider
│   └── global.css                  # Fumadocs + Tailwind styles
├── content/docs/                   # MDX content files
├── lib/
│   ├── source.ts                   # Fumadocs source loader
│   └── layout.shared.tsx           # Nav config (TSDX branding, GitHub link)
└── source.config.ts                # MDX collection config

Screenshot

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• fonts.googleapis.com
  • Triggering command: /usr/local/bin/node node /home/REDACTED/work/tsdx/tsdx/website/node_modules/.bin/next build node ite/�� 43659 .2.3 ash ts KRi.d.ts (dns block)
• fumadocs.vercel.app
  • Triggering command: /home/REDACTED/work/_temp/ghcca-node/node/bin/node /home/REDACTED/work/_temp/ghcca-node/node/bin/node --enable-source-maps /home/REDACTED/work/_temp/copilot-developer-action-main/dist/index.js (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

Review the current docs site. Research fumadocs. Migrate the docs site to fumadocs and uograde to latest / necessary next.js and react etc. keep the content roughly the same

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