test(e2e): harden mobile layout coverage, artifact isolation, and live pane assertions

- Store Playwright evidence in ignored test-results/ paths by default while preserving env override
- Clean up disposable temporary application data directories in /tmp on global teardown and exit signals
- Add Chromium mobile and tablet viewport profiles (phone portrait/landscape, tablet) for automated coverage
- Add a scoped Chromium mobile layout CI check on shard 1/4 to prevent redundant matrix execution
- Reach mobile Settings and Notes views via genuine sidebar navigation controls opened through the hamburger button
- Add assertions against live rendered Notes and Documents panes honoring safe-area top and height constraints
- Document local WebKit prerequisites and physical iOS/PWA test limitations in tests/e2e/README.md and package.json

.github/workflows/ci.yml

@@ -256,3 +256,10 @@ jobs:
         env:
           PYTEST_SHARD: ${{ matrix.shard }}
         run: python -m pytest -q -rs --durations=25 --shard "$PYTEST_SHARD"
+
+      - name: Playwright mobile layout checks (shard 1/4 only)
+        if: steps.docs-check.outputs.docs_only != 'true' && matrix.shard == '1/4'
+        run: |
+          ODYSSEUS_TEST_PYTHON=python ODYSSEUS_LAYOUT_BROWSER=chromium npx --no-install playwright test \
+            --config tests/e2e/ios-layout.config.cjs \
+            --reporter=line