docs: migrate Git Pages from Jekyll to Nextra

- Replace Jekyll custom theme with Nextra (Next.js docs framework)
- Add Tailwind CSS with WebRTC brand colors (Go Blue, Success Green)
- Create React components: Hero, FeatureCard, LanguageToggle
- Migrate all documentation to MDX format
- Support bilingual docs via file-based routing (pages/en/, pages/zh/)
- Update GitHub Actions workflow for Node.js/Nextra build
- Remove old Jekyll files (_layouts/, _includes/, _config.yml, etc.)

Author: LessUp

.github/workflows/pages.yml

@@ -4,19 +4,8 @@ on:
   push:
     branches: [main, master]
     paths:
-      - '404.md'
-      - 'CHANGELOG.md'
-      - 'CONTRIBUTING.md'
-      - 'ROADMAP.md'
-      - 'index.md'
-      - 'index.zh-CN.md'
-      - 'assets/**'
-      - '_config.yml'
-      - '_layouts/**'
-      - '_includes/**'
-      - 'docs/**'
-      - 'openspec/specs/**'
-      - 'changelog/**'
+      - 'docs/website/**'
+      - '.github/workflows/pages.yml'
   workflow_dispatch:
 
 permissions:
@@ -31,33 +20,38 @@ concurrency:
 jobs:
   build:
     runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: docs/website
     steps:
       - name: Checkout
         uses: actions/checkout@v6
         with:
           fetch-depth: 1
 
-      - name: Setup Pages
-        uses: actions/configure-pages@v6
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
         with:
-          enablement: true
+          node-version: '20'
+          cache: 'npm'
+          cache-dependency-path: docs/website/package-lock.json
 
-      - name: Build with Jekyll
-        uses: actions/jekyll-build-pages@v1
-        with:
-          source: ./
-          destination: ./_site
-          future: false
-          unpublished: false
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Build with Nextra
+        run: npm run build
 
       - name: Verify build
         run: |
-          test -f ./_site/index.html
-          test -f ./_site/docs/index.html
-          test -f ./_site/assets/css/style.css
+          test -f ../.site/index.html
+          test -f ../.site/en/index.html
+          test -f ../.site/zh/index.html
 
       - name: Upload artifact
         uses: actions/upload-pages-artifact@v5
+        with:
+          path: docs/.site
 
   deploy:
     environment:

.gitignore

@@ -49,6 +49,12 @@ _site/
 .jekyll-cache/
 .jekyll-metadata
 
+# Nextra / Next.js
+docs/website/.next/
+docs/website/node_modules/
+docs/.site/
+.next/
+
 # Environment & secrets
 .env
 .env.*