handle jumping

lib/collapsableEmailsWeb.dart

@@ -9,11 +9,14 @@ class CollapsableEmails extends StatefulWidget {
   final List<String> thread; // email id's in the form xyz@gmail.com
   final List<String> threadHTML;
   final String threadIDs;
+  final String? targetJumpNumbering;
 
-  CollapsableEmails(
-      {required this.thread,
-      required this.threadHTML,
-      required this.threadIDs});
+  const CollapsableEmails({
+    required this.thread,
+    required this.threadHTML,
+    required this.threadIDs,
+    this.targetJumpNumbering,
+  });
 
   @override
   State<CollapsableEmails> createState() => _CollapsableEmailsState();
@@ -60,6 +63,16 @@ class _CollapsableEmailsState extends State<CollapsableEmails> {
     _markdown2Tree(allMarkdown);
   }
 
+  @override
+  void didUpdateWidget(covariant CollapsableEmails oldWidget) {
+    // TODO: implement didUpdateWidget
+    super.didUpdateWidget(oldWidget);
+    if (widget.targetJumpNumbering != null &&
+        widget.targetJumpNumbering != oldWidget.targetJumpNumbering) {
+      _handleJump(widget.targetJumpNumbering!);
+    }
+  }
+
   @override
   void dispose() {
     super.dispose();
@@ -266,6 +279,54 @@ class _CollapsableEmailsState extends State<CollapsableEmails> {
     );
   }
 
+  void _handleJump(String queryNumbering) {
+    print(queryNumbering);
+    if (queryNumbering.isEmpty) {
+      ScaffoldMessenger.of(context).showSnackBar(
+        SnackBar(content: Text('Please enter a numbering to jump to.')),
+      );
+      return;
+    }
+
+    final int targetEmailIndex = _expandedEmails.first;
+    if (targetEmailIndex >= threadNodes.length) {
+      // Error handling
+      return;
+    }
+
+    final AugmentTree rootOfCurrentEmail = threadNodes[targetEmailIndex];
+    final AugmentTree? foundNode =
+        _findNodeByNumbering(rootOfCurrentEmail, queryNumbering);
+
+    if (foundNode != null) {
+      setState(() {
+        currentZoomTree[targetEmailIndex] = foundNode; // Update the state
+      });
+    } else {
+      ScaffoldMessenger.of(context).showSnackBar(
+        SnackBar(content: Text('Numbering "$queryNumbering" not found.')),
+      );
+    }
+  }
+
+  // Placeholder for your actual node finding logic within AugmentTree
+  AugmentTree? _findNodeByNumbering(AugmentTree root, String numbering) {
+    // Implement your tree traversal here (e.g., DFS or BFS)
+    // to find the AugmentTree node corresponding to the `numbering`.
+    // This is a simplified example:
+    if (root.numbering == numbering) {
+      // Assuming 'id' can be your numbering
+      return root;
+    }
+    for (var child in root.children) {
+      final found = _findNodeByNumbering(child, numbering);
+      if (found != null) {
+        return found;
+      }
+    }
+    return null;
+  }
+
   @override
   Widget build(BuildContext context) {
     return _isLoaded