Document-to-memory links and actual `derives` relations were both emitted as `derives`, so they shared the same color and legend entry.
This separates structural document links into a `document` edge type, adds a dedicated theme color with `--graph-edge-document` support, and updates force-layout and level-of-detail handling to preserve existing structural behavior. The package and MCP widget legends/themes now distinguish document links from derived-memory relations.
Adds regression coverage for edge classification and validates the package plus its MCP consumer.
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**Before:** Console lost its theme and dots. Incoming nodes needed a drag to reorganize, fit missed later pages, and clicks or drag release could leave the layout moving.
**After:** Restore themed rendering with configurable dots. Automatically settle and fit incoming nodes, keep clicks from reheating forces, and cool the layout after drag release.
**Checked:** Package types/build and Console build linked to this package.
Console companion: [mono#3295](https://github.com/supermemoryai/mono/pull/3295).
