Render list items and checkboxes in the GUI body

The body parser now recognizes org list items (- / + / ordered) and
splits them out of text runs into dedicated "list" parts. Each item
captures its indent, bullet, optional checkbox state, and text.

A new list component renders checkbox items with ☐ / ▣ / ☑ glyphs
(unchecked / partial / checked), colored by state, with checked items
dimmed and struck through. Plain list items render with their bullet.

ui/qml/OutlineView.qml

@@ -62,7 +62,70 @@ ListView {
             let parts = [];
             let body = sectionBody;
             if (!body) return parts;
-            
+
+            // Match an org list item, capturing indent, bullet/number, optional
+            // checkbox, and the item text. Returns null for non-list lines.
+            function parseListItem(line) {
+                // Unordered: - / + bullet (indented * also allowed)
+                let m = line.match(/^(\s*)([-+])\s+(\[([ xX-])\]\s+)?(.*)$/);
+                let ordered = false;
+                if (!m) {
+                    // Ordered: 1. or 1)
+                    m = line.match(/^(\s*)(\d+)[.)]\s+(\[([ xX-])\]\s+)?(.*)$/);
+                    if (!m) return null;
+                    ordered = true;
+                }
+                let cb = "";
+                if (m[3] !== undefined) {
+                    switch ((m[4] || " ")) {
+                    case "x": case "X": cb = "checked"; break;
+                    case "-":           cb = "partial"; break;
+                    default:            cb = "unchecked"; break;
+                    }
+                }
+                return {
+                    indent: m[1].length,
+                    ordered: ordered,
+                    bullet: m[2],
+                    checkbox: cb,
+                    text: m[5]
+                };
+            }
+
+            // Push a run of text, splitting out any contiguous list items into
+            // dedicated "list" parts so they render with bullets/checkboxes.
+            function pushText(text) {
+                if (!text) return;
+                let lines = text.split('\n');
+                let buf = [];
+                let items = [];
+                function flushBuf() {
+                    if (buf.length > 0) {
+                        let t = buf.join('\n').trim();
+                        if (t) parts.push({type: "text", content: t});
+                        buf = [];
+                    }
+                }
+                function flushItems() {
+                    if (items.length > 0) {
+                        parts.push({type: "list", items: items});
+                        items = [];
+                    }
+                }
+                for (let ln of lines) {
+                    let item = parseListItem(ln);
+                    if (item) {
+                        flushBuf();
+                        items.push(item);
+                    } else {
+                        flushItems();
+                        buf.push(ln);
+                    }
+                }
+                flushItems();
+                flushBuf();
+            }
+
             let lines = body.split('\n');
             let currentText = [];
             let inCode = false;
@@ -80,8 +143,7 @@ ListView {
                 if (!inCode && !inTable && trimmed.toUpperCase().startsWith("#+BEGIN_SRC")) {
                     // Flush pending text
                     if (currentText.length > 0) {
-                        let text = currentText.join('\n').trim();
+                        pushText(currentText.join('\n').trim());
-                        if (text) parts.push({type: "text", content: text});
                         currentText = [];
                     }
                     inCode = true;
@@ -100,8 +162,7 @@ ListView {
                 else if (!inTable && trimmed.startsWith("|")) {
                     // Flush pending text
                     if (currentText.length > 0) {
-                        let text = currentText.join('\n').trim();
+                        pushText(currentText.join('\n').trim());
-                        if (text) parts.push({type: "text", content: text});
                         currentText = [];
                     }
                     inTable = true;
@@ -151,8 +212,7 @@ ListView {
                 }
                 parts.push({type: "table", rows: rows, hasHeader: hasHeader});
             } else if (currentText.length > 0) {
-                let text = currentText.join('\n').trim();
+                pushText(currentText.join('\n').trim());
-                if (text) parts.push({type: "text", content: text});
             }
             
             return parts;
@@ -344,7 +404,8 @@ ListView {
                         required property var modelData
                         Layout.fillWidth: true
                         sourceComponent: modelData.type === "code" ? codeBlockComponent : 
-                                        modelData.type === "table" ? tableComponent : textBlockComponent
+                                        modelData.type === "table" ? tableComponent :
+                                        modelData.type === "list" ? listComponent : textBlockComponent
                         
                         Component {
                             id: textBlockComponent
@@ -367,6 +428,58 @@ ListView {
                                 }
                             }
                         }
+
+                        // Plain / checkbox list rendering
+                        Component {
+                            id: listComponent
+                            ColumnLayout {
+                                spacing: outline.baseFontSize * 0.2
+
+                                Repeater {
+                                    model: modelData.items ?? []
+
+                                    delegate: RowLayout {
+                                        required property var modelData
+                                        spacing: outline.baseFontSize * 0.4
+                                        // Indentation: 2 spaces of org indent ≈ one level.
+                                        Layout.leftMargin: outline.baseFontSize
+                                                           + (modelData.indent / 2) * outline.indentWidth
+
+                                        // Checkbox glyph, or a plain bullet when no checkbox.
+                                        Label {
+                                            readonly property string cb: modelData.checkbox ?? ""
+                                            text: {
+                                                switch (cb) {
+                                                case "checked":   return "☑"
+                                                case "partial":   return "▣"
+                                                case "unchecked": return "☐"
+                                                default:
+                                                    return (modelData.ordered ?? false) ? "•" : (modelData.bullet ?? "•")
+                                                }
+                                            }
+                                            color: cb === "checked" ? theme.doneColor
+                                                   : cb === "partial" ? theme.waitingColor
+                                                   : cb === "unchecked" ? theme.todoColor
+                                                   : theme.placeholderTextColor
+                                            font.pointSize: outline.baseFontSize + 1
+                                            font.bold: cb !== ""
+                                        }
+
+                                        // Item text; checked items are dimmed and struck through.
+                                        Label {
+                                            Layout.fillWidth: true
+                                            text: modelData.text ?? ""
+                                            color: (modelData.checkbox === "checked")
+                                                   ? theme.placeholderTextColor : theme.textColor
+                                            font.pointSize: outline.baseFontSize + 1
+                                            font.strikeout: modelData.checkbox === "checked"
+                                            wrapMode: Text.WordWrap
+                                            textFormat: Text.PlainText
+                                        }
+                                    }
+                                }
+                            }
+                        }
                         
                         Component {
                             id: codeBlockComponent