fix(analysis): remove unused key param, replace fontWeight.index with .value

render_table.dart: _TableDepthExceededPlaceholder is private and never
constructed with an explicit key — remove unused optional parameter.

udt_serializer.dart: FontWeight.index is deprecated in Flutter 3.41.x.
Use FontWeight.value which returns the CSS weight (100-900) directly.

Author: Nguyễn Tuấn Việt

packages/hyper_render_core/lib/src/core/render_table.dart

@@ -45,7 +45,7 @@ class _TableNestingDepth extends InheritedWidget {
 
 /// Shown in place of a table that exceeds [_kMaxTableNestingDepth].
 class _TableDepthExceededPlaceholder extends StatelessWidget {
-  const _TableDepthExceededPlaceholder({super.key});
+  const _TableDepthExceededPlaceholder();
 
   @override
   Widget build(BuildContext context) {

packages/hyper_render_devtools/lib/src/udt_serializer.dart

@@ -58,7 +58,7 @@ class UdtSerializer {
       // Text
       'color': style.color.toARGB32(),
       'fontSize': style.fontSize,
-      'fontWeight': style.fontWeight.index,
+      'fontWeight': style.fontWeight.value,
       'fontStyle': style.fontStyle.index,
       'fontFamily': style.fontFamily,
       'lineHeight': style.lineHeight,