fix: 修正 .mcp.json 为本项目 MCP 配置 + 补充多源展示测试

- .mcp.json 原为 Mac 上另一项目(serena)残留配置,按文档 8.2 重写为 a-share-research
- 补充 test_fmt_results_multi_source_tag(验证 [多源] 展示)
- MCP 服务核心(5 工具/stdio/SSE/依赖/测试)此前已实现并经端到端验证

tests/test_mcp.py

@@ -41,9 +41,11 @@ def _hit(title: str = "测试标题", source: str = "cls", score: float = 0.9,
          sentiment: str = "positive", stock_codes: list[str] | None = None,
          company_names: list[str] | None = None, summary: str = "摘要",
          publish_time: str = "2026-06-16T10:00:00",
-         url: str = "https://example.com/1") -> dict:
+         url: str = "https://example.com/1",
+         sources: list[str] | None = None) -> dict:
     return {
         "title": title, "url": url, "source": source, "score": score,
+        "sources": sources or [source],
         "publish_time": publish_time,
         "event": {
             "sentiment": sentiment, "importance": 4, "event_type": "重大合同",
@@ -61,6 +63,14 @@ def test_fmt_results_contains_title_and_source() -> None:
     assert "0.9" in out
 
 
+def test_fmt_results_multi_source_tag() -> None:
+    """多源新闻显示「来源A / 来源B [多源]」。"""
+    hits = [_hit("多源新闻", sources=["cls", "sina"])]
+    out = _fmt_results(hits, "查询")
+    assert "cls / sina" in out
+    assert "[多源]" in out
+
+
 def test_fmt_results_includes_event_fields() -> None:
     hits = [_hit(
         company_names=["宁德时代"], stock_codes=["300750"],