Add complete AI-powered diagram generation pipeline: natural language input
→ type inference → graph patch generation → validated canvas render with
ELK.js layout animation. Includes adversarial code review fixes for
diagramType enum validation, duplicate ID detection, tool part history
preservation, PATCH error handling, and graphData structural validation.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Add AI copilot chat panel to the diagram editor with streaming responses,
chat history persistence, and markdown rendering. Includes copilot API route,
diagram-aware system prompt, and schema with 15 passing tests.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
