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feat(webui): sporadic-trigger capture, CSV export and UI rework

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Brings the Go hub and web SPA work developed on feature/udpscope onto
main, without the udpscope client itself.

The trigger engine could not capture a sporadic event: it armed on the
live tail only, so a burst shorter than one push window was already past
by the time the FSM looked for it. It now searches the ring history for
the crossing, which also makes a capture reproducible from the same data
rather than dependent on push timing (wshub/trigger.go, ringbuf.go,
history.go).

Adds CSV/JSON export of the visible window (wshub/export.go) and reworks
the SPA: per-signal axis controls, a readable trigger panel, and a fix
for the flicker caused by repainting on every push instead of on a frame
tick (static/app.js, index.html, style.css).

BUFFER_AND_TRIGGER.md documents the ring/decimation/trigger interaction,
which is otherwise only inferable from the three files that implement it.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
Martino Ferrari
2026-09-02 01:18:46 +02:00
co-authored by Claude Opus 4.6
parent cf815e1d3f
commit f334995865
18 changed files with 1980 additions and 164 deletions
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Client/udpstreamer/static/index.html
+5 -1
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@@ -41,7 +41,11 @@
<button id="btn-ruler" class="ctrl-btn" title="Horizontal value rulers">Rulers</button>
<button id="btn-zoom-back" class="ctrl-btn" style="display:none">← Back</button>
<button id="btn-zoom-fit" class="ctrl-btn">Fit</button>
<button id="btn-csv-all" class="ctrl-btn" title="Export all signals to CSV">⬇ CSV</button>
<select id="export-select" class="ctrl-select" title="Export the visible signals">
<option value="" disabled selected>⬇ Export</option>
<option value="csv" title="Export the visible signals as CSV (decimated to a bounded row count)">CSV</option>
<option value="parquet" title="Export every stored sample (full resolution, no holes) as Parquet — requires the Go hub">Parquet</option>
</select>
<button id="btn-sync-resume" class="ctrl-btn resume-btn" style="display:none">↺ Auto</button>
<button id="btn-trigger" class="ctrl-btn">⚡ Trigger</button>
<button id="btn-pause-global" class="ctrl-btn">⏸ Pause</button>