sub agent toggle on a agent from mcp server is not pulled as new config in on 'Edit' Agent button

[johnda98]

The reason the engine specialist keeps saying “I don’t have a YouTube search API” is that delegated agents run with whatever configuration is stored on the LangGraph server. Runtime overrides from the chat sidebar only reach the supervisor agent; sub‑agents such as delegate_to_engine_tech continue using their last saved config. Because the sidebar’s Save button was only writing the “general” fields (configsByAgentId[agentId]) and ignored the tool/RAG/supervisor sections that live under agentId:selected-tools, agentId:rag, etc., the YouTube tool never made it into the persisted config, so downstream agents still believed they had no access.

I updated the sidebar so it now saves the merged configuration returned by getAgentConfig(agentId) instead of just the base slice. This patch in index.tsx (lines 15, 210‑233) means your tool toggles, RAG collections, and supervisor selections are now included whenever you click Save. Once they’re persisted, every delegated agent invoked by the supervisor will receive the same tool list the UI shows.