Testing Infrastructure Improvements for new-webui

Background

The current testing setup for the new-webui component uses tap and is described as a 'toy test that doesn't do anything substantial'. As part of the ongoing refactoring to align with Fastify maintainer recommendations, the testing infrastructure needs to be completely redone.

Requirements

• Set up proper separation between unit tests and integration tests
• Consider replacing tap with a more popular testing framework (potential alternatives: jest, mocha, vitest)
• Implement comprehensive testing for the new fastify-v2 app
• Address the TODO comment in components/log-viewer-webui/server/src/utils/tap.ts regarding testing setup

References

• Originated from discussion in PR refactor(new-webui): Enhance server implementation with Fastify toolchain. #899: refactor(new-webui): Enhance server implementation with Fastify toolchain. #899
• Specific comment thread: refactor(new-webui): Enhance server implementation with Fastify toolchain. #899 (comment)

Additional Notes

The integration tests may require the clp package to be running.