fix(agent): filter TuShare news with upstream keyword input (#16361)

## Summary

TuShare required non-empty upstream input but filtered fetched news with
the static `keyword` param (default empty string), so agent-provided
keywords were ignored.

Use `self._param.keyword or ans` when filtering, matching how AkShare
uses upstream input for its query.

Fixes #16360

## Test plan

- [x] `test_tushare_filters_with_upstream_keyword_when_param_empty`
mocks the API and asserts only rows matching the upstream keyword are
returned

---------

Co-authored-by: yzc <yuzhichang@gmail.com>
Co-authored-by: Harsh Kashyap <harshkashyap@Harshs-MacBook-Pro.local>

agent/tools/tushare.py

@@ -14,6 +14,7 @@
 #  limitations under the License.
 #
 import json
+import logging
 from abc import ABC
 import pandas as pd
 import time
@@ -73,7 +74,18 @@ class TuShare(ComponentBase, ABC):
             df.columns = response['data']['fields']
             if self.check_if_canceled("TuShare processing"):
                 return
-            tus_res.append({"content": (df[df['content'].str.contains(self._param.keyword, case=False)]).to_markdown()})
+            keyword = self._param.keyword or ans
+            logging.info(
+                "TuShare news filter keyword source=%s",
+                "param.keyword" if self._param.keyword else "upstream_input",
+            )
+            tus_res.append(
+                {
+                    "content": (
+                        df[df["content"].str.contains(keyword, case=False, na=False, regex=False)]
+                    ).to_markdown()
+                }
+            )
         except Exception as e:
             if self.check_if_canceled("TuShare processing"):
                 return

test/unit_test/agent/tools/test_tushare.py

@@ -0,0 +1,91 @@
+#
+#  Copyright 2026 The InfiniFlow Authors. All Rights Reserved.
+#
+#  Licensed under the Apache License, Version 2.0 (the "License");
+#  you may not use this file except in compliance with the License.
+#  You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
+#
+
+from unittest.mock import MagicMock, patch
+
+import pytest
+
+from agent.tools.tushare import TuShare, TuShareParam
+
+
+class _Canvas:
+    def is_canceled(self):
+        return False
+
+
+def _tushare(param=None):
+    cpn = TuShare.__new__(TuShare)
+    cpn._canvas = _Canvas()
+    cpn._param = param or TuShareParam()
+    return cpn
+
+
+def _response():
+    response = MagicMock()
+    response.json.return_value = {
+        "code": 0,
+        "data": {
+            "items": [
+                [1, "Apple earnings beat expectations"],
+                [2, "Google cloud revenue grows"],
+                [3, "C++ regex special chars should not break filtering"],
+            ],
+            "fields": ["id", "content"],
+        },
+    }
+    return response
+
+
+@pytest.mark.p1
+def test_tushare_filters_with_upstream_keyword_when_param_empty():
+    cpn = _tushare()
+
+    with patch.object(TuShare, "get_input", return_value={"content": ["Apple"]}):
+        with patch("agent.tools.tushare.requests.post", return_value=_response()):
+            result = cpn._run([])
+
+    text = result.iloc[0]["content"]
+    assert "Apple" in text
+    assert "Google" not in text
+
+
+@pytest.mark.p1
+def test_tushare_prefers_explicit_param_keyword_over_upstream_input():
+    param = TuShareParam()
+    param.keyword = "Google"
+    cpn = _tushare(param)
+
+    with patch.object(TuShare, "get_input", return_value={"content": ["Apple"]}):
+        with patch("agent.tools.tushare.requests.post", return_value=_response()):
+            result = cpn._run([])
+
+    text = result.iloc[0]["content"]
+    assert "Google" in text
+    assert "Apple" not in text
+
+
+@pytest.mark.p1
+def test_tushare_treats_keyword_as_literal_text():
+    param = TuShareParam()
+    param.keyword = "C++"
+    cpn = _tushare(param)
+
+    with patch.object(TuShare, "get_input", return_value={"content": ["ignored"]}):
+        with patch("agent.tools.tushare.requests.post", return_value=_response()):
+            result = cpn._run([])
+
+    text = result.iloc[0]["content"]
+    assert "C++ regex special chars should not break filtering" in text