Adds the pure filtering primitives the graph pane composes: VaultGraph
nodesWithin (depth-bounded BFS over undirected edges = the local graph
around a note) and subgraph (retain a node set + the edges between them),
plus GraphFilter, which combines depth-from-active with tag include/exclude
over a caller-supplied tag map. Flutter-free; runs under dart test.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
VaultGraph.fromOutlinks builds the graph from pql's per-file outlinks: every
file a node (labelled by basename), each outlink to a known file an edge;
self/dangling links dropped, parallels de-duped. neighborhood() drives the
hover-highlight; edgePairs feeds the ForceLayout solver. Pure Dart,
dart-tested (6 cases). The graph pane's data layer, on top of the solver.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
jpmschweitzerandClaude Opus 4.8