fix: prevent render API calls when GraphShardExists=false#2743

Copilot wants to merge 1 commit intomainydb-platform/ydb-embedded-ui:mainfrom

copilot/fix-cd77e614-8293-42dd-ad58-f3fd508b9f23ydb-platform/ydb-embedded-ui:copilot/fix-cd77e614-8293-42dd-ad58-f3fd508b9f23Copy head branch name to clipboard