## Summary
This PR fixes two runtime bugs in agent components:
**Bug 1: `agent/component/invoke.py` — `NameError` in POST +
`clean_html` path**
The POST method's `clean_html` branch uses the variable `sections`
without ever defining it. Both the GET and PUT branches correctly call
`sections = HtmlParser()(None, response.content)` before referencing
`sections`, but this line was missing from the POST branch (copy-paste
omission). This causes a `NameError` whenever a user configures an
Invoke component with `method="post"` and `clean_html=True`.
**Bug 2: `agent/component/data_operations.py` — `AttributeError` in
`_recursive_eval`**
The `_recursive_eval` method recursively calls `self.recursive_eval()`
(without the leading underscore) instead of `self._recursive_eval()`.
Since the method is defined as `_recursive_eval`, this causes an
`AttributeError` at runtime when the `literal_eval` operation processes
nested dicts or lists.
## Test plan
- [ ] Configure an Invoke node with `method=post` and `clean_html=True`,
verify HTML is parsed correctly without `NameError`
- [ ] Configure a DataOperations node with `operations=literal_eval` on
nested data, verify no `AttributeError`
---------
Signed-off-by: JiangNan <1394485448@qq.com>
### What problem does this PR solve?
issue:
https://github.com/infiniflow/ragflow/issues/10427
change:
new component variable assigner
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
new component：Data Operations
#10427
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
