feat: OpenMesh 基础平台与 MD/PDF 转换技能

- 后端: coworker 智能体框架, WS API, 文件上传, 附件处理
- 前端: Open WebUI, 文件全量走 upload API (含 MD/TXT/JSON 等文本类)
- 技能: md-to-office (pandoc + wkhtmltopdf)
- 修复: 上传文件路径丢失, Agent 搜索浪费, 输出文件跑到 uploads/
- 打包: PyInstaller one-dir, 预打包 pandoc/wkhtmltopdf/chromium

tests/test_todo_tool.py

@@ -0,0 +1,34 @@
+"""todo_write's wire contract.
+
+The parameter is `todos` — a top-level arguments key named "items" shadows minijinja's
+`.items()` map method in hosted chat templates (Together GLM-5.2, 2026-07-21) and 400s
+every request that replays the call. The old key stays accepted at execution time for
+models that free-style it, but must never reappear in the schema.
+"""
+
+from coworker.tools.todo import _TODO_SCHEMA, TodoList, todo_tools
+
+
+def _write(**kwargs):
+    todo = TodoList()
+    (spec,) = todo_tools(todo)
+    return spec(**kwargs), todo
+
+
+def test_schema_param_is_todos_not_items():
+    props = _TODO_SCHEMA["function"]["parameters"]["properties"]
+    assert "todos" in props
+    assert "items" not in props  # regression guard: see module docstring
+    assert _TODO_SCHEMA["function"]["parameters"]["required"] == ["todos"]
+
+
+def test_todos_key_writes_the_list():
+    result, todo = _write(todos=[{"content": "a", "status": "in_progress"}])
+    assert todo.items == [{"content": "a", "status": "in_progress"}]
+    assert result == {"count": 1, "todos": [{"content": "a", "status": "in_progress"}]}
+
+
+def test_legacy_items_key_still_executes():
+    result, todo = _write(items=[{"content": "b", "status": "done"}])
+    assert todo.items == [{"content": "b", "status": "done"}]
+    assert result["count"] == 1