ci(e2e): shard Playwright tests across two runners

.github/workflows/ui-tests.yml

@@ -23,9 +23,13 @@ env:
 
 jobs:
   ui-tests:
-    name: Playwright E2E Tests
+    name: Playwright E2E Tests (${{ matrix.shard }}/2)
     runs-on: ubuntu-latest
     timeout-minutes: 60
+    strategy:
+      fail-fast: false
+      matrix:
+        shard: [1, 2]
 
     services:
       redis-cache:
@@ -118,25 +122,25 @@ jobs:
           npx playwright install --with-deps chromium
 
       - name: Run Playwright Tests
-        run: npx playwright test
+        run: npx playwright test --shard=${{ matrix.shard }}/2
         env:
           # localhost is a secure context, which crypto.randomUUID in frappe/ui needs.
           BASE_URL: http://localhost:8000
           ADMIN_PASSWORD: admin
 
-      - name: Upload Playwright Report
+      - name: Upload Blob Report
         uses: actions/upload-artifact@v4
         if: always()
         with:
-          name: playwright-report
-          path: playwright-report/
-          retention-days: 7
+          name: blob-report-${{ matrix.shard }}
+          path: blob-report/
+          retention-days: 1
 
       - name: Upload Test Results
         uses: actions/upload-artifact@v4
         if: failure()
         with:
-          name: test-results
+          name: test-results-${{ matrix.shard }}
           path: test-results/
           retention-days: 7
 
@@ -146,3 +150,38 @@ jobs:
         run: |
           cat bench_start.log || true
           cat logs/*.log || true
+
+  merge-reports:
+    name: Merge Playwright Reports
+    needs: ui-tests
+    if: always()
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Clone
+        uses: actions/checkout@v4
+
+      - name: Setup Node
+        uses: actions/setup-node@v4
+        with:
+          node-version: 24
+
+      - name: Install Playwright
+        run: yarn install --frozen-lockfile --ignore-scripts
+
+      - name: Download Blob Reports
+        uses: actions/download-artifact@v4
+        with:
+          path: all-blob-reports
+          pattern: blob-report-*
+          merge-multiple: true
+
+      - name: Merge Into HTML Report
+        run: npx playwright merge-reports --reporter html ./all-blob-reports
+
+      - name: Upload Playwright Report
+        uses: actions/upload-artifact@v4
+        with:
+          name: playwright-report
+          path: playwright-report/
+          retention-days: 7

playwright.config.ts

@@ -11,9 +11,8 @@ export default defineConfig({
   workers: 1,
   forbidOnly: !!process.env.CI,
   retries: process.env.CI ? 1 : 0,
-  reporter: process.env.CI
-    ? [["github"], ["html", { open: "never" }]]
-    : "list",
+  // CI shards write blob reports that the merge-reports job joins into one HTML report.
+  reporter: process.env.CI ? [["github"], ["blob"]] : "list",
   timeout: 60_000,
   expect: { timeout: 10_000 },
   use: {