ci: install Playwright ffmpeg for video capture on test failure

video: 'retain-on-failure' requires ffmpeg. Previously it was pulled
in by 'npx playwright install chromium --with-deps' but we switched
to system Chrome. Install ffmpeg explicitly (3min timeout).

Refs #144

Author: CoderCoco

.github/workflows/e2e.yml

@@ -28,6 +28,11 @@ jobs:
         working-directory: app/packages/web
         timeout-minutes: 5
 
+      - name: Install Playwright ffmpeg
+        run: npx playwright install ffmpeg
+        working-directory: app/packages/web
+        timeout-minutes: 3
+
       - run: npm run app:test:e2e
 
       - uses: actions/upload-artifact@v4

.github/workflows/integration.yml

@@ -28,6 +28,11 @@ jobs:
         working-directory: app/packages/web
         timeout-minutes: 5
 
+      - name: Install Playwright ffmpeg
+        run: npx playwright install ffmpeg
+        working-directory: app/packages/web
+        timeout-minutes: 3
+
       - run: npm run app:test:integration
 
       - uses: actions/upload-artifact@v4