## Summary
Phase 2 of #979 — overlay per-hop relay SNR onto the Traces page path
graph for TRACE-type packets.
When the viewed packet is a firmware TRACE and `decoded.snrValues` is
non-empty, each hop edge in the existing path graph gets a small `<text
class="hop-snr">` label at its midpoint with the corresponding numeric
SNR value (Tufte: numeric overlay only — edge color encodes observer
attribution, thickness encodes count; per triage, do **not**
double-encode).
Non-TRACE packets render unchanged. Observer-level SNR in the timeline
is unaffected (different concept: observer receive SNR vs relay hop
SNR).
## TDD
- **Red commit:** `8d441aa51e4b38dec962c7a32d31e9f7080f2786` — adds 4
assertions in `test-traces.js` against the (not-yet-emitted) `<text
class="hop-snr">` element. CI run: see Actions on this PR.
- **Green commit:** implements the SNR-label emission in
`renderPathGraph` (`public/traces.js`).
## Test
`test-traces.js` asserts:
- TRACE + non-empty `snrValues` → `<text class="hop-snr">` labels render
with the numeric values
- non-TRACE → labels absent (regression gate for AC2)
- TRACE + empty `snrValues` → labels absent
- `decoded` omitted → labels absent (back-compat)
Fixes#1004
---------
Co-authored-by: corescope-bot <bot@corescope.local>
Co-authored-by: clawbot <bot@openclaw.local>
## Summary
- Drop prefix-only paths from path graph: partial observations (same
packet seen at 1, 2, 4, 5 hops as it propagated) were treated as
separate routes, producing long shortcut edges to Dest that visually
obscured the actual relay chain. Now filters out any path that is a
strict prefix of a longer observed path before building the graph.
- Fix invisible node labels: intermediate hop nodes used white text on
`--surface-2` background, making labels invisible in the light theme.
Labels now appear below circles and use `var(--text)` for theme-aware
contrast. Increased SVG height and node radius to give labels room;
intermediate fill uses a subtle accent tint with accent border.
## Test plan
- [ ] Open a TRACE packet's path graph with a node that has multiple
partial observations — verify no spurious shortcut edges
- [ ] Check path graph in light theme — verify intermediate hop labels
are visible
- [ ] Check path graph in dark theme — verify no regression
🤖 Generated with [Claude Code](https://claude.com/claude-code)
---------
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
