feat(workspace): per-user note pinning, real-time unlock synchronization, and icon-only share button

internal/api/server.go

@@ -792,7 +792,9 @@ func (s *Server) handleUpdateDocument(w http.ResponseWriter, r *http.Request) {
 		writeError(w, http.StatusBadRequest, err.Error())
 		return
 	}
-	s.wsHub.BroadcastDocEvent(docID, "DOC_UPDATED", doc)
+	if req.Title != nil || req.Icon != nil || req.FolderPath != nil || req.Blocks != nil || req.Tags != nil {
+		s.wsHub.BroadcastDocEvent(docID, "DOC_UPDATED", doc)
+	}
 	writeJSON(w, http.StatusOK, doc)
 }
 
@@ -927,7 +929,7 @@ func (s *Server) handleUnlockDoc(w http.ResponseWriter, r *http.Request) {
 	docID := chi.URLParam(r, "id")
 	released := s.wsHub.ReleaseDocLock(docID, userID)
 	if released {
-		s.wsHub.BroadcastDocEvent(docID, "DOC_UNLOCKED", map[string]string{"docId": docID})
+		s.wsHub.BroadcastDocEvent(docID, "DOC_UNLOCKED", map[string]string{"docId": docID, "doc_id": docID})
 	}
 	writeJSON(w, http.StatusOK, map[string]bool{"unlocked": released})
 }