fix: ignore stale coordinate data for panels + convert wavyline to use new qt 6.12 canvas painter api

Plugins/ZShell/Blobs/blobrect2.hpp

@@ -22,6 +22,9 @@ class BlobRect2 : public BlobShape2 {
 	Q_PROPERTY(
 		QQmlListProperty<BlobRect2> excludeCorners READ excludeCorners NOTIFY
 			excludeCornersChanged)
+	Q_PROPERTY(
+		bool atRestOverride READ atRestOverride WRITE setAtRestOverride NOTIFY
+			atRestOverrideChanged)
 	Q_PROPERTY(
 		qreal topLeftRadius READ topLeftRadius WRITE setTopLeftRadius NOTIFY
 			topLeftRadiusChanged)
@@ -69,11 +72,24 @@ class BlobRect2 : public BlobShape2 {
 	QQmlListProperty<BlobRect2> exclude();
 	QQmlListProperty<BlobRect2> excludeCorners();
 
+	[[nodiscard]] bool atRestOverride() const { return m_atRestOverride; }
+
+	void setAtRestOverride(bool o) {
+		if (m_atRestOverride == o) return;
+		m_atRestOverride = o;
+		emit atRestOverrideChanged();
+		if (m_group) m_group->markDirty();
+	}
+
 	bool isExcluded(const BlobShape2* other) const override;
 	bool isCornerExcluded(const BlobShape2* other) const override;
 	// The shape that is pushing is the one that can shape the bar edge. A shape that is
 	// retiring still counts, because the retire curve is still moving the surface.
-	bool isMoving() const override { return m_physicsActive || m_retiring; }
+	// atRestOverride keeps the shape in the group's data even at rest; when it is false
+	// the actual spring state decides, so it is not an override of the state itself.
+	bool isMoving() const override {
+		return m_atRestOverride || m_physicsActive || m_retiring;
+	}
 	void cornerRadii(float out[4]) const override;
 
 	[[nodiscard]] qreal topLeftRadius() const { return m_topLeftRadius; }
@@ -100,6 +116,7 @@ class BlobRect2 : public BlobShape2 {
 	void deformScaleChanged();
 	void excludeChanged();
 	void excludeCornersChanged();
+	void atRestOverrideChanged();
 	void topLeftRadiusChanged();
 	void topRightRadiusChanged();
 	void bottomLeftRadiusChanged();
@@ -119,6 +136,10 @@ class BlobRect2 : public BlobShape2 {
 	bool m_physicsActive = false;
 	bool m_hasPrevPos = false;
 
+	// Set from QML. Keeps the shape in the group's data while it is at rest; when it is
+	// false the spring state decides on its own.
+	bool m_atRestOverride = false;
+
 	bool m_retiring = false;
 	QElapsedTimer m_retireElapsed;
 	float m_retire00 = 1.0f;