ci: add cross-platform E2E and smoke test support (Linux/macOS/Windows) (#411)

* ci: add cross-platform support for E2E and smoke tests

Make headed browser tests (E2E and smoke) runnable on Linux, macOS,
and Windows:

- setup-chrome action: only install xvfb on Linux (macOS/Windows
  have native GUI sessions and don't need a virtual display)
- e2e-headed.yml: add OS matrix, use xvfb-run wrapper only on Linux
- ci.yml smoke-test: add OS matrix, use xvfb-run wrapper only on Linux

The browser-actions/setup-chrome action already supports all three
platforms natively.

* ci: exclude Windows from E2E/smoke matrix (Chrome install hangs)

browser-actions/setup-chrome hangs indefinitely during Chrome MSI
installation on Windows runners (observed 10+ min with no progress).
This is a known limitation of Windows CI runners.

Keep Linux + macOS for headed browser tests. Windows is still covered
by build, unit-test, and adapter-test jobs.

.github/actions/setup-chrome/action.yml

@@ -1,5 +1,5 @@
-name: Setup Chrome + xvfb
-description: Install real Chrome and xvfb virtual display for headed browser testing
+name: Setup Chrome
+description: Install real Chrome for browser testing (with xvfb on Linux)
 
 outputs:
   chrome-path:
@@ -19,8 +19,9 @@ runs:
       shell: bash
       run: |
         echo "Chrome path: ${{ steps.setup-chrome.outputs.chrome-path }}"
-        ${{ steps.setup-chrome.outputs.chrome-path }} --version
+        "${{ steps.setup-chrome.outputs.chrome-path }}" --version
 
-    - name: Install xvfb for headed mode
+    - name: Install xvfb (Linux only)
+      if: runner.os == 'Linux'
       shell: bash
       run: sudo apt-get install -y xvfb

.github/workflows/ci.yml

@@ -86,7 +86,13 @@ jobs:
   smoke-test:
     if: github.event_name == 'schedule' || github.event_name == 'workflow_dispatch'
     needs: build
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        # NOTE: Windows excluded — browser-actions/setup-chrome hangs during
+        # Chrome MSI installation on Windows runners (known issue).
+        os: [ubuntu-latest, macos-latest]
     steps:
       - uses: actions/checkout@v6
 
@@ -98,17 +104,25 @@ jobs:
       - name: Install dependencies
         run: npm ci
 
-      - name: Setup Chrome + xvfb
+      - name: Setup Chrome
         uses: ./.github/actions/setup-chrome
         id: setup-chrome
 
       - name: Build
         run: npm run build
 
-      - name: Run smoke tests
+      - name: Run smoke tests (Linux, via xvfb)
+        if: runner.os == 'Linux'
         run: |
           xvfb-run --auto-servernum --server-args="-screen 0 1280x720x24" \
             npx vitest run tests/smoke/ --reporter=verbose
         env:
           OPENCLI_BROWSER_EXECUTABLE_PATH: ${{ steps.setup-chrome.outputs.chrome-path }}
+
+      - name: Run smoke tests (macOS / Windows)
+        if: runner.os != 'Linux'
+        run: npx vitest run tests/smoke/ --reporter=verbose
+        env:
+          OPENCLI_BROWSER_EXECUTABLE_PATH: ${{ steps.setup-chrome.outputs.chrome-path }}
     timeout-minutes: 15
+

.github/workflows/e2e-headed.yml

@@ -33,7 +33,13 @@ concurrency:
 
 jobs:
   e2e-headed:
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        # NOTE: Windows excluded — browser-actions/setup-chrome hangs during
+        # Chrome MSI installation on Windows runners (known issue).
+        os: [ubuntu-latest, macos-latest]
     timeout-minutes: 20
     steps:
       - uses: actions/checkout@v6
@@ -46,16 +52,23 @@ jobs:
       - name: Install dependencies
         run: npm ci
 
-      - name: Setup Chrome + xvfb
+      - name: Setup Chrome
         uses: ./.github/actions/setup-chrome
         id: setup-chrome
 
       - name: Build
         run: npm run build
 
-      - name: Run E2E tests (headed Chrome + xvfb)
+      - name: Run E2E tests (Linux, via xvfb)
+        if: runner.os == 'Linux'
         run: |
           xvfb-run --auto-servernum --server-args="-screen 0 1280x720x24" \
             npx vitest run tests/e2e/ --reporter=verbose
         env:
           OPENCLI_BROWSER_EXECUTABLE_PATH: ${{ steps.setup-chrome.outputs.chrome-path }}
+
+      - name: Run E2E tests (macOS / Windows)
+        if: runner.os != 'Linux'
+        run: npx vitest run tests/e2e/ --reporter=verbose
+        env:
+          OPENCLI_BROWSER_EXECUTABLE_PATH: ${{ steps.setup-chrome.outputs.chrome-path }}