Version 2.0 adds two editing modes: Mind Map and SOP Flow.

What's new:
- Added SOP Flow mode with step and decision nodes.
- Added automatic horizontal and vertical layouts.
- Added a dynamically expanding canvas and Fit Content.
- Added standalone HTML export and HTML import.
- Save, Save As, and Ctrl/Cmd+S now export a portable HTML file.
- Improved node notes, images, undo/redo, and multi-map management.
- Improved decision-node layout and styling.