Summary

Adds support for MCP Apps — MCP server tools that provide a graphical UI. When a tool is identified as an MCP App, it renders with an APP badge in the chat tools display. Clicking it opens a sandboxed iframe side panel within the chat interface.

Changes

• Backend: k8s-deployment.ts — added getAvailableTools() to detect MCP servers with UI capabilities
• Backend: manager.ts — aggregates tools from all running deployments via allAvailableTools
• Backend: schemas.ts — extended AvailableToolSchema with optional mcpAppUrl field
• Frontend: agent-tools-display.tsx — tools with mcpAppUrl render as clickable buttons with APP badge, dispatching OPEN_MCP_APP event
• Frontend: mcp-app-panel.tsx (new) — sandboxed iframe side panel component

Demo

Screenshots:

Initial UI	Excalidraw Panel	n8n Panel

Security

• Iframe uses sandbox="allow-scripts allow-same-origin allow-forms allow-popups" for isolation
• Panel is closable and does not affect chat functionality

/claim #1301