Fix: undefined variable and wrong method name in agent components (#13462)

## 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>

agent/component/data_operations.py

@@ -94,9 +94,9 @@ class DataOperations(ComponentBase,ABC):
 
     def _recursive_eval(self, data):
         if isinstance(data, dict):
-            return {k: self.recursive_eval(v) for k, v in data.items()}
+            return {k: self._recursive_eval(v) for k, v in data.items()}
         if isinstance(data, list):
-            return [self.recursive_eval(item) for item in data]
+            return [self._recursive_eval(item) for item in data]
         if isinstance(data, str):
             try:
                 if (

agent/component/invoke.py

@@ -121,6 +121,7 @@ class Invoke(ComponentBase, ABC):
                     else:
                         response = requests.post(url=url, data=args, headers=headers, proxies=proxies, timeout=self._param.timeout)
                     if self._param.clean_html:
+                        sections = HtmlParser()(None, response.content)
                         self.set_output("result", "\n".join(sections))
                     else:
                         self.set_output("result", response.text)