fix: align note checkboxes with the text baseline

Tests/ConjureKitTests/NotesEditingTests.swift

@@ -1273,6 +1273,8 @@ func listCheckboxesStayCenteredInTheSharedColumnAtEachIndentation() throws {
     let editor = NotesTextView(frame: NSRect(x: 0, y: 0, width: 400, height: 300))
     let source = "- bullet\n- [ ] task\n12345. wide number\n  + nested bullet\n  - [x] nested task"
     editor.setMarkdownContents(NSAttributedString(string: source))
+    MarkdownHighlighting.apply(to: editor)
+    editor.refreshTasks()
     let layout = try #require(editor.layoutManager)
     let container = try #require(editor.textContainer)
     layout.ensureLayout(for: container)
@@ -1288,6 +1290,11 @@ func listCheckboxesStayCenteredInTheSharedColumnAtEachIndentation() throws {
             .offsetBy(dx: editor.textContainerOrigin.x, dy: editor.textContainerOrigin.y)
         let checkbox = try #require(checkboxes.indices.contains(index) ? checkboxes[index] : nil)
         #expect(abs(checkbox.frame.midX - frame.midX) <= 0.5)
+        let bodyGlyph = layout.glyphIndexForCharacter(at: body.location)
+        let fragment = layout.lineFragmentRect(forGlyphAt: bodyGlyph, effectiveRange: nil)
+        let baseline = editor.textContainerOrigin.y + fragment.minY + layout.location(forGlyphAt: bodyGlyph).y
+        let font = try #require(editor.textStorage?.attribute(.font, at: body.location, effectiveRange: nil) as? NSFont)
+        #expect(abs(checkbox.frame.midY - (baseline - font.capHeight / 2)) <= 0.5)
     }
     #expect(editor.markdownString == source)
 }