This release focuses on core graph-model capabilities, callback ergonomics,
rendering/styling improvements, and major documentation expansion.

Highlights

• Parameterized Node/Edge instances as first-class graph elements —
  ReactFlow now supports instance-based graph authoring with richer Python
  object workflows, including improved serialization/sync behavior and expanded
  API/core test coverage.
• Event callback improvements — .on(...) callbacks can now accept the
  ReactFlow instance as a second argument and support async callbacks, making
  app-level event handling significantly more flexible.
• Rendering fixes for embedded views — improved scaling and interaction
  behavior when rendering figures inside nodes, including better handling of
  drag/pan/scroll conflicts within embedded content.
• Editor rendering robustness — fixed node and edge editor rendering paths
  so editors can render reliably even when no node view is defined.
• Color mode and default node styling support — added color-mode-aware
  styling capabilities and refined baseline node CSS for better defaults out of
  the box.
• Expanded how-to documentation — substantial updates to guides for
  declaring types, defining nodes/edges, editors, embedding views, reacting to
  events, and styling, with refreshed screenshots across the docs.
• Examples overhaul in docs — added an examples gallery with grid cards and
  dedicated pages/screenshots for each example app, plus docs navigation
  updates for easier discovery.