Owns the dev-server lifecycle: it builds once, launches a supervised child process, and — for
backend apps — watches the sources to rebuild and restart on change. Console output is
context-aware: the first launch shows a banner + build spinner + "watching" hint, while a
live-reload cycle shows a concise "changed → rebuilt · restarted" line.
The serve command class.
Owns the dev-server lifecycle: it builds once, launches a supervised child process, and — for backend apps — watches the sources to rebuild and restart on change. Console output is context-aware: the first launch shows a banner + build spinner + "watching" hint, while a live-reload cycle shows a concise "changed → rebuilt · restarted" line.