- Thread runtime Context through expression trees via ParameterExpression
instead of baking a parse-time constant (Node was always null)
- Fix ExpressionPart to compile Func<Context,string> and invoke with live ctx
- Coerce double arithmetic expressions to string before lambda wrapping
- Remove HasAttributes guard in attr() that blocked new attribute creation
- Replace GetLevel(XmlNode) with XElement.Parent-based implementation
- Add cdata()/cdata(txt) functions to read/write CDATA nodes in place,
preserving the XCData wrapper that SetValue() would destroy
Clanker: claude-sonnet_4.6
