gui: fix infinite layout loop in chat ListView

The delegate used a ColumnLayout root with parent-dependent width
fallbacks (: 0, : 100) causing two-pass layouts. Combined with
onContentHeightChanged -> positionViewAtEnd(), this created a
feedback loop: height change -> scroll -> refill -> new delegates ->
height change -> ... burning 100% CPU on the main thread.

Fixes:
- Replace onContentHeightChanged with onCountChanged + Qt.callLater
- Replace ColumnLayout root with plain Column
- Bind all child widths to root.width (top-down, no fallbacks)
- Create context Menu lazily on first right-click
- Add reuseItems: true to the ListView
- Standardize bin path to ~/.local/bin

gui/ChatBlockDelegate.qml

@@ -3,7 +3,7 @@ import QtQuick 2.15
 import QtQuick.Controls 2.15
 import QtQuick.Layouts 1.15
 
-ColumnLayout {
+Column {
     id: root
     spacing: 2
 
@@ -80,7 +80,7 @@ ColumnLayout {
 
     // Clickable header
     Rectangle {
-        Layout.fillWidth: true
+        width: root.width
         height: 22
         radius: 3
         color: root.headerColor()
@@ -115,7 +115,7 @@ ColumnLayout {
 
     // Block content rendered as segments
     Column {
-        Layout.fillWidth: true
+        width: root.width
         visible: root.blockExpanded
         spacing: 4
 
@@ -123,7 +123,7 @@ ColumnLayout {
             model: root.blockSegments || []
 
             delegate: Loader {
-                width: parent ? parent.width : 0
+                width: root.width
                 active: modelData !== null && modelData !== undefined
                 sourceComponent: (modelData && modelData.type === "diagram") ? diagramComponent : textComponent
                 property var segmentData: modelData || {}
@@ -137,7 +137,7 @@ ColumnLayout {
 
         TextEdit {
             id: textEdit
-            width: parent ? parent.width : 100
+            width: root.width
             text: segmentData.html || ""
             textFormat: Text.RichText
             readOnly: true
@@ -150,23 +150,11 @@ ColumnLayout {
             selectedTextColor: theme.highlightedTextColor
 
             onActiveFocusChanged: {
-                                if (!activeFocus && root.parentListView)
-                                    root.parentListView.interactive = true
-                            }
-
-            Menu {
-                id: contextMenu
-                MenuItem {
-                    text: "Copy"
-                    enabled: textEdit.selectedText.length > 0
-                    onTriggered: textEdit.copy()
-                }
-                MenuItem {
-                    text: "Select All"
-                    onTriggered: textEdit.selectAll()
-                }
+                if (!activeFocus && root.parentListView)
+                    root.parentListView.interactive = true
             }
 
+            // Left-click: disable ListView flick while selecting text
             MouseArea {
                 anchors.fill: parent
                 acceptedButtons: Qt.LeftButton
@@ -182,11 +170,41 @@ ColumnLayout {
                 }
             }
 
+            // Right-click: lazy context menu
             MouseArea {
                 anchors.fill: parent
                 acceptedButtons: Qt.RightButton
                 cursorShape: Qt.IBeamCursor
-                onClicked: contextMenu.popup()
+                onClicked: {
+                    if (!textEdit._menu) {
+                        textEdit._menu = contextMenuComponent.createObject(textEdit)
+                    }
+                    textEdit._menu.popup()
+                }
+            }
+
+            property Menu _menu: null
+
+            Component.onDestruction: {
+                if (_menu) _menu.destroy()
+            }
+        }
+    }
+
+    // Shared context menu component (created on demand)
+    Component {
+        id: contextMenuComponent
+        Menu {
+            id: ctxMenu
+            property TextEdit target: parent
+            MenuItem {
+                text: "Copy"
+                enabled: ctxMenu.target ? ctxMenu.target.selectedText.length > 0 : false
+                onTriggered: if (ctxMenu.target) ctxMenu.target.copy()
+            }
+            MenuItem {
+                text: "Select All"
+                onTriggered: if (ctxMenu.target) ctxMenu.target.selectAll()
             }
         }
     }
@@ -197,7 +215,7 @@ ColumnLayout {
 
         Rectangle {
             id: diagramRect
-            width: parent ? parent.width : 100
+            width: root.width
             height: diagramContent.height + diagramHeader.height + 8
             color: "transparent"
             border.color: theme.midColor

gui/main.qml

@@ -883,18 +883,21 @@ ApplicationWindow {
                     visible: ollie.daemonConnected && ollie.activeAgentId !== ""
 
                     property bool followTail: true
-                    property bool scrollingNow: false
 
-                    onContentHeightChanged: {
-                        if (followTail && !scrollingNow && contentHeight > 0) {
-                            scrollingNow = true
-                            positionViewAtEnd()
-                            scrollingNow = false
-                        }
+                    reuseItems: true
+
+                    onCountChanged: {
+                        if (followTail)
+                            Qt.callLater(chatView.scrollToEnd)
                     }
 
                     onMovementEnded: followTail = atYEnd
 
+                    function scrollToEnd() {
+                        if (followTail && contentHeight > height)
+                            positionViewAtEnd()
+                    }
+
                     delegate: ChatBlockDelegate {
                         width: chatView.width - 8
                         parentListView: chatView

justfile

@@ -1,6 +1,6 @@
 # Ollie KDE integration build system
 home := env_var('HOME')
-bin := home / 'bin'
+bin := home / '.local/bin'
 
 kde:
     @echo '=== Building ollie-kde (KF6) ==='