Re-enable Jest tests in CI

- Jest environment issues are now fixed with v29.7.0 upgrade
- Tests work properly with the updated configuration
- Some packages may have snapshot format changes but tests pass

Author: captbaritone

.github/workflows/ci.yml

@@ -145,8 +145,7 @@ jobs:
           touch packages/skin-database/config.js
           # Run tests with optimizations for CI
           export CI=true
-          # Skip root-level tests due to Jest configuration conflicts between packages
-          # pnpm test -- --maxWorkers=2
+          pnpm test -- --maxWorkers=2
           pnpm --filter webamp test -- --maxWorkers=2
         env:
           NODE_ENV: test