Improve Explorer graph visuals and initial layout

[PRAteek-singHWY]

Summary

Improves the visual clarity and initial layout of the Explorer 3D force graph by tuning force simulation and camera positioning, while preserving full interactivity.

Changes

• Tuned force charge values to reduce node overcrowding on initial load
• Added a controlled “expand from center” animation on first render
• Adjusted initial camera position and orientation for a more horizontal, readable layout
• Ensured the graph remains fully interactive (pan, zoom, rotate) after settling
• No changes to data processing, filtering logic, or graph semantics

Before / After

Before

• Dense, vertically skewed initial layout
• Harder to visually trace relationships on first load

After

• Smooth expansion from center on load
• More balanced, horizontally oriented layout
• Improved spacing and readability within the viewport

graph.mp4

Scope

• Visual and layout improvements only
• No dependency changes
• No behavioral or data logic changes

Fixes #494

[PRAteek-singHWY]

Hi @northdpole 👋

I tried my best to bring the Explorer force graph visuals as close as possible to the original reference here:
https://zeljkoobrenovic.github.io/opencre-explorer/visuals/force-graph-3d-all.html

The focus was on improving initial clarity (spacing, orientation, and first-load animation) while keeping all existing behavior and interactivity intact.

I’m definitely open to suggestions or further improvements if there are specific aspects you’d like to tweak or align more closely with the original. Happy to iterate on this 👍