base katex overline, underline implementation

Author: MdSaifAliMolla

lib/widgets/katex.dart

@@ -42,13 +42,12 @@ class KatexWidget extends StatelessWidget {
   Widget build(BuildContext context) {
     Widget widget = _KatexNodeList(nodes: nodes);
 
-    return IntrinsicWidth(
-      child: Directionality(
+    return Directionality(
       textDirection: TextDirection.ltr,
       child: DefaultTextStyle(
         style: mkBaseKatexTextStyle(textStyle).copyWith(
           color: ContentTheme.of(context).textStylePlainParagraph.color),
-        child: widget)));
+        child: widget));
   }
 }
 
@@ -246,11 +245,11 @@ class _KatexVlist extends StatelessWidget {
   Widget build(BuildContext context) {
     final em = DefaultTextStyle.of(context).style.fontSize!;
 
-    return IntrinsicWidth(child: Stack(children: List.unmodifiable(node.rows.map((row) {
+    return Stack(children: List.unmodifiable(node.rows.map((row) {
       return Transform.translate(
         offset: Offset(0, row.verticalOffsetEm * em),
         child: _KatexSpan(row.node));
-    }))));
+    })));
   }
 }