add

server/internal/websocket/websocket.go

@@ -47,6 +47,16 @@ func (h *WsHub) IsStudentOnline(studentRkID int64) bool {
 	return ok
 }
 
+func (h *WsHub) PushExamToStudent(studentRkID int64, data map[string]any) {
+	h.mu.RLock()
+	client, ok := h.students[studentRkID]
+	h.mu.RUnlock()
+	if !ok || client == nil {
+		return
+	}
+	_ = client.Conn.WriteJSON(SocketMsg{Event: "exam:paper-sent", Data: data})
+}
+
 func (h *WsHub) PushChatToStudent(studentRkID int64, data map[string]any) {
 	h.mu.RLock()
 	client, ok := h.students[studentRkID]