test: exercise real page workflows and enforce frontend coverage

.github/workflows/viewerjs-check.yml

@@ -2,22 +2,9 @@ name: Viewer.js vendor and compatibility
 
 on:
   pull_request:
-    paths:
-      - 'tools/vendor/**'
-      - 'tests/vendor/**'
-      - 'tests/js/**'
-      - 'web/js/**'
-      - 'web/lib/**'
-      - '.github/workflows/viewerjs-*.yml'
+    branches: [main]
   push:
     branches: [main]
-    paths:
-      - 'tools/vendor/**'
-      - 'tests/vendor/**'
-      - 'tests/js/**'
-      - 'web/js/**'
-      - 'web/lib/**'
-      - '.github/workflows/viewerjs-*.yml'
   workflow_dispatch:
 
 permissions:
@@ -26,8 +13,15 @@ permissions:
 jobs:
   viewerjs:
     runs-on: ubuntu-latest
+    timeout-minutes: 15
     steps:
       - uses: actions/checkout@v7
+      - uses: actions/setup-python@v7
+        with:
+          python-version: '3.12'
+          cache: pip
+          cache-dependency-path: requirements-dev.txt
+      - run: python -m pip install -r requirements-dev.txt
       - uses: actions/setup-node@v7
         with:
           node-version: '24'
@@ -36,6 +30,18 @@ jobs:
       - run: npm ci --prefix tools/vendor --ignore-scripts
       - run: npm run --prefix tools/vendor check
       - run: npm run --prefix tools/vendor test
-      - run: node --test tests/js/*.test.js
-      - run: npx --prefix tools/vendor playwright install --with-deps chromium
-      - run: npm run --prefix tools/vendor test:browser
+      - run: npx --prefix tools/vendor playwright install --with-deps chromium firefox webkit
+      - name: Frontend unit, viewer, workflow, and coverage checks
+        run: npm run --prefix tools/vendor test:coverage
+      - name: Firefox and WebKit page workflows
+        run: npm run --prefix tools/vendor test:workflows -- --project firefox --project webkit
+      - name: Upload browser traces and frontend coverage
+        if: always()
+        uses: actions/upload-artifact@v7
+        with:
+          name: frontend-test-reports
+          path: |
+            tools/vendor/test-results/
+            coverage/js/
+            !coverage/js/raw/**
+          retention-days: 14