feat: unify download task tool names

tests/test_agent_download_task_tool_names.py

@@ -0,0 +1,27 @@
+from unittest.mock import patch
+
+from app.agent.tools.factory import MoviePilotToolFactory
+
+
+def test_factory_registers_plural_download_task_tool_names():
+    """
+    下载任务工具应统一使用 *_download_tasks 命名。
+    """
+    with patch(
+        "app.agent.tools.factory.PluginManager.get_plugin_agent_tools",
+        return_value=[],
+    ):
+        tools = MoviePilotToolFactory.create_tools(
+            session_id="download-task-names",
+            user_id="10001",
+        )
+
+    tool_names = {tool.name for tool in tools}
+    assert {
+        "add_download_tasks",
+        "query_download_tasks",
+        "update_download_tasks",
+        "delete_download_tasks",
+    } <= tool_names
+    assert "add_download" not in tool_names
+    assert "delete_download" not in tool_names