Graph PR-B: clean (non-overlapping) demo seed spacing + force reseed#63
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…ed (PR-B) The demo sub-graphs were laid out on a 140px grid — far under the node-card collision diameter (~224px) — so they loaded as overlapping "garbage piles". - hierarchyDemo.ts: sub-graph grid spacing 140 -> 260 (> collision diameter), so the seeded layout is non-overlapping on load with zero physics cost (matters for the 1000-node showcase). Nodes stay placed/pinned (no drift). - create-hierarchy-demo --force: deletes the existing demo (edges -> work items -> graphs, in order, so no orphan edges) and recreates it, so the spacing fix can be applied to an already-seeded DB. Verified: reseeded (17 graphs / 2911 items / 4073 edges); a 90-node sub-graph has 0 overlapping card pairs; THE GATE 5/5. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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The demo sub-graphs were seeded on a 140px grid — under the ~224px card collision diameter — so they loaded as overlapping piles.
hierarchyDemo.ts: sub-graph spacing 140 → 260 (> collision diameter) → non-overlapping on load, zero physics cost (important for the 1000-node Compute Core showcase). Nodes stay pinned (no drift).create-hierarchy-demo --force: tears down the existing demo (edges → work items → graphs, so no orphan edges) and recreates it, to apply the spacing fix to an already-seeded DB.Pairs with PR-A (one-shot physics): PR-A's Organize/auto-layout cleans any graph; PR-B makes the canonical demo clean by construction so it never needs organizing.
Verified: reseeded the dev DB (17 graphs / 2911 items / 4073 edges); a 90-node sub-graph has 0 overlapping card pairs; THE GATE 5/5.
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