feat(workspace): decouple folder sharing with independent mount points & real-time sync

internal/ws/hub.go

@@ -501,6 +501,8 @@ func (h *Hub) BroadcastTaskEvent(userID, event string, payload interface{}) {
 func (h *Hub) BroadcastDocEvent(docID, event string, payload interface{}) {
 	if docID != "" {
 		h.BroadcastRoom("doc:"+docID, event, payload, nil)
+	} else {
+		h.BroadcastToAll(event, payload)
 	}
 }