implemented Ticker page selection persistence and enhanced ProseMirror table display modes

lib/widget/prosemirror/pm_render_scope.dart

@@ -20,3 +20,24 @@ class PmRenderScope extends InheritedWidget {
   bool updateShouldNotify(PmRenderScope oldWidget) =>
       oldWidget.onLinkTap != onLinkTap;
 }
+
+/// Controls whether inline text below it may wrap. Table cells disable wrapping
+/// in the scroll/zoom modes so every row stays a single line (bound height),
+/// matching the web ticker; the default outside tables is to wrap.
+class PmCellTextFlow extends InheritedWidget {
+  final bool softWrap;
+
+  const PmCellTextFlow({
+    required this.softWrap,
+    required super.child,
+    super.key,
+  });
+
+  static bool softWrapOf(BuildContext context) =>
+      context.dependOnInheritedWidgetOfExactType<PmCellTextFlow>()?.softWrap ??
+      true;
+
+  @override
+  bool updateShouldNotify(PmCellTextFlow oldWidget) =>
+      oldWidget.softWrap != softWrap;
+}