better support for opening chat in floating window

Modules/Notifications/Sidebar/Chat/Content/MessageDelegate.qml

@@ -17,7 +17,8 @@ MouseArea {
 	required property ChatMessage modelData
 	property bool reasoningExpanded: false
 	readonly property var blocks: blockify(current.segments)
-	property real savedContentY: -1
+	property real savedOffset: -1
+	property bool stickActive: false
 
 	function handleReasoningToggle(expanded: bool): void {
 		const view = root.ListView.view;
@@ -25,14 +26,16 @@ MouseArea {
 			return;
 
 		if (expanded) {
-			root.savedContentY = view.contentY;
+			root.savedOffset = view.contentY - root.y;
 			root.reasoningExpanded = true;
 		} else {
 			root.reasoningExpanded = false;
-			if (root.savedContentY !== -1) {
-				restoreAnim.to = root.savedContentY;
+			root.stickActive = false;
+			settleTimer.stop();
+			if (!isNaN(root.savedOffset)) {
+				restoreAnim.to = root.y + root.savedOffset;
 				restoreAnim.restart();
-				root.savedContentY = -1;
+				root.savedOffset = NaN;
 			}
 		}
 	}
@@ -69,6 +72,30 @@ MouseArea {
 	preventStealing: false
 	implicitHeight: layout.implicitHeight + Tokens.padding.medium
 
+	Timer {
+		id: settleTimer
+		interval: 16
+
+		onTriggered: {
+			root.stickActive = false;
+		}
+	}
+
+	onImplicitHeightChanged: {
+		if (root.reasoningExpanded) {
+			root.stickActive = true;
+			settleTimer.restart();
+
+			const view = root.ListView.view;
+			if (!view)
+				return;
+			const bottomEdge = root.y + root.height + Tokens.padding.large * 2;
+			const viewportBottom = view.contentY + view.height;
+			if (bottomEdge > viewportBottom)
+				view.contentY = bottomEdge - view.height;
+		}
+	}
+
 	Behavior on current {
 		id: changeAnim
 
@@ -119,14 +146,6 @@ MouseArea {
 		}
 	}
 
-	Binding {
-		property: "contentY"
-		restoreMode: Binding.RestoreNone
-		target: root.ListView.view
-		value: root.y + root.height + Tokens.padding.large * 2 - root.ListView.view.height
-		when: root.reasoningExpanded && root.ListView.view && (root.y + root.height + Tokens.padding.large * 2 > root.ListView.view.contentY + root.ListView.view.height)
-	}
-
 	Anim {
 		id: restoreAnim