Migrate from Karma/Chai/Mocha to Vitest with Playwright browser mode

Co-authored-by: dgreif <[email protected]>

Author: Copilot

.github/workflows/nodejs.yml

@@ -5,12 +5,15 @@ permissions:
 jobs:
   build:
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        node-version: [22, 24]
     steps:
       - uses: actions/checkout@v4
-      - name: Use Node.js
+      - name: Use Node.js ${{ matrix.node-version }}
         uses: actions/setup-node@v4
         with:
-          node-version: 22
+          node-version: ${{ matrix.node-version }}
           cache: npm
       - run: npm install
       - run: npm run build

.github/workflows/publish.yml

@@ -15,7 +15,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-node@v4
         with:
-          node-version: 22
+          node-version: 24
           registry-url: https://registry.npmjs.org/
           cache: npm
       - run: npm ci

install-browsers.sh

@@ -0,0 +1,21 @@
+#!/bin/bash
+# Install Playwright browsers for testing
+# This downloads the browsers to ~/.cache/ms-playwright/
+
+set -e
+
+echo "Installing Playwright browsers..."
+
+# Download chromium
+wget -q --show-progress -O /tmp/chromium.zip "https://cdn.playwright.dev/dbazure/download/playwright/builds/chromium/1194/chromium-linux.zip"
+mkdir -p ~/.cache/ms-playwright/chromium-1194
+unzip -q /tmp/chromium.zip -d ~/.cache/ms-playwright/chromium-1194
+rm /tmp/chromium.zip
+
+# Download chromium headless shell
+wget -q --show-progress -O /tmp/chromium-headless-shell.zip "https://cdn.playwright.dev/dbazure/download/playwright/builds/chromium/1194/chromium-headless-shell-linux.zip"
+mkdir -p ~/.cache/ms-playwright/chromium_headless_shell-1194
+unzip -q /tmp/chromium-headless-shell.zip -d ~/.cache/ms-playwright/chromium_headless_shell-1194
+rm /tmp/chromium-headless-shell.zip
+
+echo "Playwright browsers installed successfully!"