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0e1beac52f
## Summary Fixes the neighbor affinity graph returning empty results despite abundant ADVERT data in the store. **Root cause:** `extractFromNode()` in `neighbor_graph.go` only checked for `"from_node"` and `"from"` fields in the decoded JSON, but real ADVERT packets store the originator public key as `"pubKey"`. This meant `fromNode` was always empty, so: - Zero-hop edges (originator↔observer) were never created - Originator↔path[0] edges were never created - Only observer↔path[last] edges could be created (and only for non-empty paths) **Fix:** Check `"pubKey"` first in `extractFromNode()`, then fall through to `"from_node"` and `"from"` for other packet types. ## Bugs Fixed | Bug | Issue | Fix | |-----|-------|-----| | Empty graph results | #522 | `extractFromNode()` now reads `pubKey` field from ADVERTs | | 3-4s response time | #523 comment | Graph was rebuilding correctly with 60s TTL cache — the slow response was due to iterating all packets finding zero matches. With edges now being found, the cache works as designed. | | Incomplete visualization | #523 comment | Downstream of bug 1+2 — fixed by fixing the builder | | Accessibility | #523 comment | Added text-based neighbor list, dynamic aria-label, keyboard focus CSS, dashed lines for ambiguous edges, confidence symbols | ## Changes - **`cmd/server/neighbor_graph.go`** — Fixed `extractFromNode()` to check `pubKey` field (real ADVERT format) - **`cmd/server/neighbor_graph_test.go`** — Added 2 new tests: `TestBuildNeighborGraph_AdvertPubKeyField` (real ADVERT format) and `TestBuildNeighborGraph_OneByteHashPrefixes` (1-byte prefix collision scenario) - **`public/analytics.js`** — Added accessible text-based neighbor list, dynamic aria-label, dashed line pattern for ambiguous edges - **`public/style.css`** — Added `:focus-visible` keyboard focus indicator for canvas ## Testing All Go tests pass (`go test ./... -count=1`). New tests verify the fix prevents regression. Fixes #523, Fixes #522 --------- Co-authored-by: you <you@example.com>