Windowed module protocol: every op admitted inside a 3.4s window after the firmware's observed temp poll (cadence 3.5-4.2s measured, stuck-at-last-fetch stale mechanism proven and avoided), acquire/window with panic on dead heartbeat; noise column shows green on/off cycle phase, cable-missing state unchanged

ui.go

@@ -350,8 +350,9 @@ func (d *display) chipAt(i, n, cols, x, w, y, h int, c rgb) (int, int, int) {
 
 // Whether rather than how many: over a window this short a count changes faster
 // than it can be read. The noise chip rides along at the end, presence rather
-// than health: red is the cable missing, not the cable failing.
-func (d *display) errChips(x, w, y int, e errs, recentCorrected, noiseMissing uint64) int {
+// than health: red is the cable missing, not the cable failing, and a present
+// cable names its cycle phase in green.
+func (d *display) errChips(x, w, y int, e errs, recentCorrected uint64, nv noiseView) int {
 	n := len(errRows) + 2
 	for i, r := range errRows {
 		c := errColor(r.get(e))
@@ -364,9 +365,16 @@ func (d *display) errChips(x, w, y int, e errs, recentCorrected, noiseMissing ui
 	}
 	cx, cw, cy := d.chipAt(len(errRows), n, gridCols, x, w, y, d.chipH(), c)
 	d.centerIn(d.grid, cx, cw, cy+chipPadY, "corrected", c)
-	c = errColor(noiseMissing)
+	c = errColor(nv.missing)
+	label := "noise"
+	if nv.missing == 0 {
+		label = "noise off"
+		if nv.on {
+			label = "noise on"
+		}
+	}
 	cx, cw, cy = d.chipAt(len(errRows)+1, n, gridCols, x, w, y, d.chipH(), c)
-	d.centerIn(d.grid, cx, cw, cy+chipPadY, "noise", c)
+	d.centerIn(d.grid, cx, cw, cy+chipPadY, label, c)
 	return y + d.chipsH()
 }
 
@@ -425,7 +433,7 @@ func correctedStat(v uint64) statCell {
 	return statCell{scaleCount(v), "corrected", col}
 }
 
-func (d *display) render(v view, elapsed time.Duration, phy phyDisplay, noiseMissing uint64) error {
+func (d *display) render(v view, elapsed time.Duration, phy phyDisplay, nv noiseView) error {
 	fb := d.fb
 	fb.fill(uiBg)
 
@@ -435,7 +443,7 @@ func (d *display) render(v view, elapsed time.Duration, phy phyDisplay, noiseMis
 		{scaleSI(v.rxPPS), "packets/s", uiFg},
 		snrStat(phy),
 	})
-	d.errChips(x, w, d.nowYs[1], v.window, phy.recent, noiseMissing)
+	d.errChips(x, w, d.nowYs[1], v.window, phy.recent, nv)
 
 	x, w = d.panel(d.sincePanel, v.since.total() > 0 || phy.metresClass == clsBad)
 	d.stats(d.gridB, x, w, d.sinceYs[0], []statCell{