minimap

[jtydhr88]

(replacement for #4475 as there are too many conflicts hard to fix in previous one)
As part of New Gen, this PR implements a minimap, making it convenient for users to preview the entire workflow from a global perspective.

Minimap Feature Summary
This PR introduces a minimap component that provides users with a bird's-eye view of their entire workflow. Here are the key features for review:

Core Functionality

Global Overview: Displays a scaled-down representation of the entire workflow graph, allowing users to see the big picture at a glance
Interactive Navigation: Users can click and drag within the minimap to quickly pan to different areas of the main canvas
Viewport Indicator: Shows a highlighted rectangle representing the currently visible area of the main canvas

User Controls

Toggle Visibility: Can be shown/hidden via a dedicated button in the canvas menu or keyboard shortcut (Alt+M)
Zoom Support: Mouse wheel interactions allow zooming in/out directly from the minimap
Persistent Settings: Remembers the user's visibility preference across sessions

Integration

Real-time Updates: Automatically reflects changes when nodes are added, removed, or connections are modified
Responsive Design: Adapts to different canvas sizes and maintains proper scaling
Non-intrusive Positioning: Fixed in the bottom-right corner with appropriate z-indexing

Demo video

2025-07-22.21-58-53.mp4

┆Issue is synchronized with this Notion page by Unito

[christian-byrne]

Changes:

• Added type for callbacks object
• Removed global state singleton pattern and convert to stateful composable
• Don't render component if minimap not initialized
• Add documentation for the 0.9 magic number
• Visual design to match Figma design: Blue nodes (#0B8CE999), orange connections/slots (#F99614), charcoal background (#15161C), 8px border radius
• Create minimum viewport dimensions to prevent small number of nodes being zoomed too much
• Performance: Fast path rendering for 0 nodes case
• Merged with main to resolved conflict in apiSchema

[christian-byrne]

Updated unit tests to mock arc and fill and expect new colors.

[christian-byrne]

Changed toggle logic.

[christian-byrne]

LGTM!