imap: emit messageinfo when changing read state.

We need to emit the changed msgInfo whenever we modify the state

worker/imap/flags.go

@@ -1,6 +1,7 @@
 package imap
 
 import (
+	"fmt"
 	"github.com/emersion/go-imap"
 
 	"git.sr.ht/~sircmpwn/aerc/worker/types"
@@ -51,12 +52,26 @@ func (imapw *IMAPWorker) handleReadMessages(msg *types.ReadMessages) {
 		flags = []interface{}{imap.SeenFlag}
 	}
 	uids := toSeqSet(msg.Uids)
-	if err := imapw.client.UidStore(uids, item, flags, nil); err != nil {
+	emitErr := func(err error) {
 		imapw.worker.PostMessage(&types.Error{
 			Message: types.RespondTo(msg),
 			Error:   err,
 		}, nil)
+	}
+	if err := imapw.client.UidStore(uids, item, flags, nil); err != nil {
+		emitErr(err)
 		return
 	}
+	imapw.worker.PostAction(&types.FetchMessageHeaders{
+		Uids: msg.Uids,
+	}, func(_msg types.WorkerMessage) {
+		switch m := _msg.(type) {
+		case *types.Error:
+			err := fmt.Errorf("handleReadMessages: %v", m.Error)
+			imapw.worker.Logger.Printf("could not fetch headers: %s", err)
+			emitErr(err)
+		case *types.Done:
 			imapw.worker.PostMessage(&types.Done{types.RespondTo(msg)}, nil)
 		}
+	})
+}