feat: comprehensive mobile responsiveness for agent dashboard and swarm control ...

This update transforms the Agent Drilldown and Swarm Control pages into fully responsive interfaces. Summary of changes:
- Swarm Control: Added a mobile-optimized tabbed layout and drawer-style file explorer.
- Agent Dashboard: Implemented a sticky tab navigation for mobile users to switch between Chat, Evaluation, and Files.
- Configuration & Profile: Refined flex grids and headers for better scaling on small screens.
- UI: Fixed several layout overlaps and overflow issues on narrow viewports.

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 backend code to improve modularity and extensibility