feat: Add React chat demo gallery

.changeset/chat-demo-gallery.md

@@ -0,0 +1,5 @@
+---
+'@link-assistant/react-chat-ui': minor
+---
+
+Add a React chat demo gallery with theme and language controls, a Doublets-compatible Unicode data store, browser-commander E2E coverage, and issue #1 case study documentation.

.github/workflows/chat-demos.yml

@@ -0,0 +1,99 @@
+name: Chat demo pages
+
+on:
+  pull_request:
+    types: [opened, synchronize, reopened]
+  push:
+    branches:
+      - main
+  workflow_dispatch:
+
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+concurrency:
+  group: chat-demo-pages-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  build-test:
+    name: Build and test chat demos
+    runs-on: ubuntu-latest
+    timeout-minutes: 15
+    steps:
+      - uses: actions/checkout@v6
+
+      - uses: actions/setup-node@v6
+        with:
+          node-version: '24.x'
+
+      - name: Install dependencies
+        run: npm install
+
+      - name: Install Chromium
+        run: npx playwright install --with-deps chromium
+
+      - name: Build demo pages
+        run: npm run demo:build
+
+      - name: Run browser-commander demo tests
+        run: npm run test:e2e
+
+      - name: Upload demo screenshot
+        uses: actions/upload-artifact@v7
+        with:
+          name: chat-demo-screenshot
+          path: docs/screenshots/issue-1-chat-demos.png
+
+      - name: Configure GitHub Pages
+        if: github.event_name == 'push' && github.ref == 'refs/heads/main'
+        uses: actions/configure-pages@v6
+
+      - name: Upload GitHub Pages artifact
+        if: github.event_name == 'push' && github.ref == 'refs/heads/main'
+        uses: actions/upload-pages-artifact@v5
+        with:
+          path: dist/chat-demos
+
+  deploy:
+    name: Deploy chat demos
+    if: github.event_name == 'push' && github.ref == 'refs/heads/main'
+    needs: build-test
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    outputs:
+      page_url: ${{ steps.deployment.outputs.page_url }}
+    steps:
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v5
+
+  post-deploy-test:
+    name: Verify deployed chat demos
+    if: github.event_name == 'push' && github.ref == 'refs/heads/main'
+    needs: deploy
+    runs-on: ubuntu-latest
+    timeout-minutes: 15
+    steps:
+      - uses: actions/checkout@v6
+
+      - uses: actions/setup-node@v6
+        with:
+          node-version: '24.x'
+
+      - name: Install dependencies
+        run: npm install
+
+      - name: Install Chromium
+        run: npx playwright install --with-deps chromium
+
+      - name: Run browser-commander tests against GitHub Pages
+        env:
+          CHAT_DEMO_BASE_URL: ${{ needs.deploy.outputs.page_url }}
+          CHAT_DEMO_SCREENSHOT_PATH: docs/screenshots/issue-1-chat-demos-deployed.png
+        run: npm run test:e2e

.jscpd.json

@@ -10,6 +10,9 @@
     "**/*.min.js",
     "**/coverage/**",
     "**/.changeset/**",
+    "docs/case-studies/*/data/**",
+    "docs/chat-demos/public/**",
+    "docs/screenshots/**",
     "**/package-lock.json",
     "**/pnpm-lock.yaml",
     "**/yarn.lock"