This commit introduces a proper integration test environment for the frontend: - Creates a test environment option in the frontend installer - Uses the real backend in Docker containers - Binds frontend to 127.0.0.1 for local testing only - Adds automatic verification testing of backend-frontend communication - Provides scripts to easily start and stop the test environment 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <noreply@anthropic.com>