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