feat: graphs now properly sized + port static graphs to c++

Plugins/ZShell/Components/sparklineitem.cpp

@@ -19,7 +19,7 @@ void SparklineItem::geometryChange(
 }
 
 void SparklineItem::updateContentOffset() {
-	m_content->setX(-m_content->stepX() * m_slideProgress);
+	m_content->setSlideProgress(m_slideProgress);
 }
 
 void SparklineItem::applySmoothingRadius(
@@ -111,12 +111,26 @@ qreal SparklineItem::slideProgress() const {
 }
 
 void SparklineItem::setSlideProgress(qreal progress) {
-	if (qFuzzyCompare(m_slideProgress, progress)) return;
+	// Always forwarded: with a slide interval set the phase comes from the sample
+	// clock, so the offset can move even when the animation value repeats. An
+	// unchanged position is a no-op in QQuickItem.
 	m_slideProgress = progress;
 	updateContentOffset();
 	emit slideProgressChanged();
 }
 
+qreal SparklineItem::slideInterval() const {
+	return m_slideInterval;
+}
+
+void SparklineItem::setSlideInterval(qreal intervalMs) {
+	if (qFuzzyCompare(m_slideInterval, intervalMs)) return;
+	m_slideInterval = intervalMs;
+	m_content->setSlideInterval(intervalMs);
+	updateContentOffset();
+	emit slideIntervalChanged();
+}
+
 int SparklineItem::historyLength() const {
 	return m_historyLength;
 }