The README now includes actual user credentials (email/password combinations) for testing. While this may be convenient for development, it poses a security risk if these accounts exist in any shared or production-like environment. Consider removing these credentials or making it clear these are only for local development with a fresh database, and recommend that users create their own test accounts.

Using --rerun-tasks on every run can significantly slow down the build process as it forces Gradle to re-execute all tasks even when inputs haven't changed. This defeats Gradle's incremental build optimization. Consider removing --rerun-tasks and only using --no-configuration-cache if environment variable handling is the main concern. The --no-configuration-cache flag should be sufficient to ensure fresh environment variables are read.

The isPasswordStrong function is duplicated in both register.js and dashboard.js with identical implementations. This code duplication violates the DRY principle and makes maintenance harder. Consider extracting this function to auth.js or a separate validation utility module that can be shared between pages, ensuring consistency and easier updates to password validation logic.

The token refresh logic in apiCall could create a race condition when multiple API calls fail simultaneously with 401 errors. Each call will attempt to refresh the token, potentially causing multiple refresh requests and token rotation issues. Consider implementing a singleton pattern or mutex to ensure only one refresh operation happens at a time, with subsequent calls waiting for the refresh to complete before retrying.

Storing sensitive tokens (access and refresh tokens) in localStorage makes them vulnerable to XSS attacks. Any JavaScript code on the page can access localStorage. Consider using httpOnly cookies for refresh tokens or implementing additional security measures. For a demo/learning application this may be acceptable, but in production, refresh tokens should be stored in httpOnly cookies to prevent JavaScript access.

The test coverage for CustomOAuth2UserService is minimal. The class contains important logic for fetching GitHub emails and enriching user data, including error handling and fallback logic, but the tests only verify that the class is instantiable and extends the correct parent class. Add tests to cover the enrichGitHubUser method, email fetching logic, and error scenarios to ensure this critical authentication component works correctly.

Eclipse-specific configuration files (.settings/, .project) are being added to version control. These IDE-specific files typically should not be committed as they can cause conflicts between developers using different IDEs or IDE versions. Consider adding these to .gitignore instead and letting each developer configure their own IDE settings.

A new RestTemplate instance is created as a field in this Spring component without proper configuration. RestTemplate should ideally be configured as a Spring bean with proper error handling, timeouts, and connection pooling. Consider injecting a configured RestTemplate bean instead of creating a new instance here, or at minimum configure timeouts to prevent hanging requests if GitHub's API is slow or unresponsive.

The logging levels in application-local.yml have been changed from DEBUG to INFO for Spring Web, Hibernate SQL, and JDBC bindings. While this reduces log verbosity, the change is not mentioned in the PR description. If this is intentional for the bundled frontend, it should be documented. Consider whether these debugging features should remain enabled in the local profile to help with development and troubleshooting.

Unused variable matchWarning.