fix: address codecov configuration issues

- Create coverage directory before pytest runs to ensure junit xml output succeeds
- Fix codecov upload file paths (coverage.xml and coverage/lcov.info)
- Configure jest-junit to output to coverage/junit.xml explicitly
- Set coverageDirectory to ./coverage for consistency

Addresses CodeRabbit review comments.

Author: devin-ai-integration[bot]

.github/workflows/build.yml

@@ -44,6 +44,7 @@ jobs:
           set -eux
           python -m pip install .[test]
 
+          mkdir -p coverage
           pytest -vv -r ap --cov jupyterlab_deepnote --cov-report=xml --junit-xml=coverage/pytest-results.xml
           jupyter server extension list
           jupyter server extension list 2>&1 | grep -ie "jupyterlab_deepnote.*OK"
@@ -58,7 +59,7 @@ jobs:
         uses: codecov/codecov-action@v5
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
-          files: ./coverage.xml,./coverage/lcov.info
+          files: coverage.xml,coverage/lcov.info
           fail_ci_if_error: false
 
       - name: Upload test results to Codecov

jest.config.js

@@ -22,8 +22,12 @@ module.exports = {
     '!src/**/*.d.ts',
     '!src/**/.ipynb_checkpoints/*'
   ],
+  coverageDirectory: './coverage',
   coverageReporters: ['lcov', 'text'],
-  reporters: ['default', 'jest-junit'],
+  reporters: [
+    'default',
+    ['jest-junit', { outputDirectory: './coverage', outputName: 'junit.xml' }]
+  ],
   testRegex: 'src/.*/.*.spec.ts[x]?$',
   transformIgnorePatterns: [`/node_modules/(?!${esModules}).+`]
 };