fix: center bullets and checkboxes in the marker column

Sources/Conjure/NotesTextView.swift

@@ -19,7 +19,7 @@ private final class ListAttachment: NSTextAttachment {
         let cell = ListAttachmentCell(textCell: isTask ? "" : (source.length == 1 ? "•" : source.string))
         cell.attributedStringValue = NSAttributedString(string: cell.stringValue,
             attributes: [.font: NotesAppearance.font, .foregroundColor: SunsetPalette.accent])
-        cell.alignment = .right
+        cell.alignment = source.length == 1 ? .center : .right
         attachmentCell = cell
         bounds = NSRect(x: 0, y: -4, width: 22, height: 21)
     }
@@ -35,7 +35,8 @@ private final class ListAttachmentCell: NSTextAttachmentCell {
         guard !stringValue.isEmpty else { return }
         let label = attributedStringValue
         let size = label.size()
-        label.draw(at: NSPoint(x: cellFrame.maxX - 4 - size.width,
+        let x = alignment == .center ? cellFrame.midX - size.width / 2 : cellFrame.maxX - 4 - size.width
+        label.draw(at: NSPoint(x: x,
                                y: cellFrame.midY - size.height / 2))
     }
 }
@@ -617,7 +618,8 @@ final class NotesTextView: NSTextView, @MainActor NSLayoutManagerDelegate {
             let glyphs = layoutManager.glyphRange(forCharacterRange: task.range, actualCharacterRange: nil)
             let rect = layoutManager.boundingRect(forGlyphRange: glyphs, in: textContainer)
                 .offsetBy(dx: textContainerOrigin.x, dy: textContainerOrigin.y)
-            checkbox.setFrameOrigin(NSPoint(x: rect.maxX - 18, y: rect.midY - checkbox.frame.height / 2))
+            checkbox.setFrameOrigin(NSPoint(x: rect.midX - checkbox.frame.width / 2,
+                                           y: rect.midY - checkbox.frame.height / 2))
         }
     }