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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/style.css
+8
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@@ -14,6 +14,11 @@
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height:100%; background:var(--bg); color:var(--text);
font-family:'Segoe UI',system-ui,sans-serif; font-size:14px; overflow:hidden; }
/* Uniform 0.9x compaction — scales every element (fonts, bars, plots,
spacing) while reflowing layout. `zoom` (Chrome/Edge/Safari, Firefox 126+)
is preferred over `transform: scale` because it reflows, so fixed-position
bars and JS-computed offsets stay aligned. */
html { zoom: 0.9; }
::-webkit-scrollbar { width:6px; }
::-webkit-scrollbar-track { background:var(--mantle); }
::-webkit-scrollbar-thumb { background:var(--surface1); border-radius:3px; }
@@ -256,6 +261,9 @@ input[type=range].trig-range::-webkit-slider-thumb {
#plot-grid.l2x3 { grid-template-columns:1fr 1fr; grid-template-rows:1fr 1fr 1fr; }
#plot-grid.l1x4 { grid-template-columns:1fr; grid-template-rows:1fr 1fr 1fr 1fr; }
#plot-grid.l4x1 { grid-template-columns:1fr 1fr 1fr 1fr; grid-template-rows:1fr; }
/* 1+2 layout: one plot spanning the top row, two side by side below. */
#plot-grid.l1p2 { grid-template-columns:1fr 1fr; grid-template-rows:1fr 1fr; }
#plot-grid.l1p2 .plot-card:first-child { grid-column: 1 / -1; }
/* ── Plot card ────────────────────────────────────────────────── */
.plot-card {