UI Fix: Prevent Evaluation sections from collapsing and add minimum heights to metrics cards for better layout stability

fix(prod): restore stability and enhance agent observability ...

- fix: correct build context paths in docker-compose.test-nodes.yml for remote hosts
- fix: provide default 'skill_type' in system skill bootstrap to avoid IntegrityError
- fix: relax X-Proxy-Secret check for OIDC environments to allow UI steering
- feat: redesign agent status bar for high-density observability (Current vs Last Action)
- fix: correct .coworker.md path resolution in Evaluation Hub
- chore: remove obsolete 'Open Evaluation Hub' button

feat: stabilize browser streaming, fix quality audit UI readability, and harden integration test harness

feat: comprehensive mobile responsiveness for agent dashboard and swarm control

style(chat): optimize markdown preview formatting to be vastly more compact and remove excessive whitespace

Refactor AI Config and Fix Login failure: Migrated services to a structured api directory, updated backend schemas for multiple TTS/STT providers, and improved settings/chat UI coverage.

refactor(frontend): move chat UI into feature module and update imports