Add (switch on/off) Scientific Insights into Summary Output

[BlitzBricksterYY-db]

Summary

Add a new optional agent node, controlled by a UI toggle/button labeled Scientific Insights, that runs downstream of the existing Summarize agent.

Motivation

The summarize agent can already produce a streaming summary. For some use cases, we want that summary to be augmented with scientific research from MCP-backed sources such as PubMed, with the research results appended to the end of the streamed output as an additional chapter.

Proposed behavior

• Add a new UI-level on/off control labeled Scientific Insights.
• When enabled, route the Summarize Agent output into a downstream/subagent node for scientific research.
• The new node should be able to call MCP servers for scientific sources, for example PubMed, and synthesize relevant research based on the summary output.
• Append the scientific research section back into the Summarize Agent streaming output as a final chapter after the existing accordion panel content.
• When disabled, the current summarize flow should remain unchanged.

Acceptance criteria

• The feature can be toggled on and off from the UI.
• Scientific research is executed only after summarize output is available.
• The appended section is clearly separated from the existing summary content.
• The current summarize experience is preserved when the toggle is off.

Notes

This is intended as an additional downstream capability rather than a replacement for the current summary workflow.