The get_component_tree tool currently returns full component serialization (including VDOM, VNode, listeners) for every node in the hierarchy, resulting in massive payloads (1M+ tokens) for complex apps.

Goals:

1. Introduce a lean mode (default: true) to ComponentService.getComponentTree.
2. Strict Whitelisting: In lean mode, return only the following properties: id, className, ntype, parentId, items.
3. Ensure the recursion logic respects this whitelist, preventing any other configs (like vdom, vnode, listeners, theme, style) from leaking into the output.

Impact:
Reduce payload size by ~95%, enabling agents to inspect large application trees without exhausting context windows.