- Add DevServerView with command detection, start/stop/restart controls, live logs, and preview URL management
- Implement useDevServer with SSE log streaming, running-state polling, manual URL updates, and candidate detection support
- Extend dashboard API client mappings for dev-server candidate metadata, status fields, and preview URL helpers
- Integrate dev server navigation in header/mobile nav, normalize devserver view state persistence, and add feature-flag wiring
- Add/refresh DevServerView and useDevServer tests and replace legacy dev-server CSS with the new component styles