profile [nfc]: Wrap Paragraph widget in DefaultTextStyle

This is NFC because baseContentTextStyle just sets the color
attribute, and this particular Paragraph only renders a link, which
will clobber the default color with the link color.

But we're about to move some other text style attributes (size and
line height) from Paragraph to baseContentTextStyle, and we don't
want the link to lose those style attributes when we make that
change.

Author: chrisbobbe

lib/widgets/profile.dart

@@ -217,7 +217,9 @@ class _LinkWidget extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     final linkNode = LinkNode(url: url, nodes: [TextNode(text)]);
-    final paragraph = Paragraph(node: ParagraphNode(nodes: [linkNode], links: [linkNode]));
+    final paragraph = DefaultTextStyle.merge(
+      style: baseContentTextStyle,
+      child: Paragraph(node: ParagraphNode(nodes: [linkNode], links: [linkNode])));
     return Padding(
       padding: const EdgeInsets.symmetric(horizontal: 8),
       child: MouseRegion(