implemented the Ticker module with a native ProseMirror document renderer and integrated API support for structured content, navigation trees, and proxied files

lib/widget/prosemirror/pm_render_scope.dart

@@ -0,0 +1,22 @@
+import 'package:flutter/widgets.dart';
+
+/// Carries render-time collaborators (the link-tap hook) down the node tree so
+/// individual node widgets stay pure `(node) => Widget` builders.
+class PmRenderScope extends InheritedWidget {
+  /// Invoked when a link mark or an image `href` is tapped. The navigation /
+  /// URL policy is injected from outside — the renderer only exposes the hook.
+  final void Function(String href)? onLinkTap;
+
+  const PmRenderScope({
+    required this.onLinkTap,
+    required super.child,
+    super.key,
+  });
+
+  static PmRenderScope? maybeOf(BuildContext context) =>
+      context.dependOnInheritedWidgetOfExactType<PmRenderScope>();
+
+  @override
+  bool updateShouldNotify(PmRenderScope oldWidget) =>
+      oldWidget.onLinkTap != onLinkTap;
+}