fix(dashboard): wire layer + node-type filters into knowledge-graph view

[patrickloscabos-art]

Summary

The Filter panel's per-layer checkboxes and per-node-type checkboxes (article, entity, topic, claim, source) have no visible effect when viewing a knowledge graph. KnowledgeGraphView.tsx only reads the all-or-nothing nodeTypeFilters.knowledge flag — it never consumes filters.layerIds or filters.nodeTypes, even though FilterPanel writes to both and the layer checkboxes are gated on layers.length > 0 (which only fires on graphs that have layers — i.e. knowledge graphs and architecture-layered code graphs).

Repro

1. Run /understand-knowledge on any Karpathy-pattern wiki with multiple categories in index.md so the resulting graph has 2+ layers.
2. Open the dashboard, click Filter, scroll to Layers, toggle off all but one layer.
3. Nothing changes — the full graph is still rendered.

Fix

In understand-anything-plugin/packages/dashboard/src/components/KnowledgeGraphView.tsx:

• Subscribe to filters from the store.
• When filters.layerIds.size > 0, build an allow-set of nodes in the selected layers plus their one-hop neighbors (via the edge list). The one-hop expansion is important because analyzer-generated entity and claim nodes typically aren't placed in any layer's nodeIds — a strict layer-membership filter would orphan the picked layer's articles by hiding the entities/claims they reference.
• Also honor filters.nodeTypes so the per-node-type checkboxes filter the knowledge view, matching their behavior in code/domain views.
• Preserve the existing nodeTypeFilters.knowledge blanket toggle.

Manual test

On a 191-node / 279-edge knowledge graph with 8 layers:

• All layers selected (or none, the default): 191 nodes — unchanged.
• Single layer selected: drops to ~30 nodes (8 articles in the layer + the entities/claims they cite/exemplify/build on), with the subgraph remaining connected.
• All knowledge node types unchecked: empty view (unchanged blanket behavior).
• Individual node-type checkbox (e.g. uncheck entity): entity nodes vanish, edges pruned, articles/claims remain.

Test plan

• Run dashboard against a knowledge graph; verify layer checkboxes hide non-selected layers
• Toggle individual node-type checkboxes; verify they filter the knowledge view
• Toggle the knowledge-category checkbox; verify the blanket behavior still works
• Visit a non-knowledge graph (code/domain); verify nothing regresses

🤖 Generated with Claude Code