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

coworker/tools/todo.py

@@ -0,0 +1,87 @@
+"""Todo / plan tool — a structured task list the agent maintains and the UI renders.
+
+Most of the "organized agent" feel in interactive work. Low risk, auto-approved. The list
+is held in a `TodoList` the surface can read; `todo_write` replaces it.
+"""
+
+from __future__ import annotations
+
+from dataclasses import dataclass, field
+
+import aisuite as ai
+
+_STATUSES = {"pending", "in_progress", "done"}
+
+# Explicit schema — the array-of-objects shape can't be auto-generated reliably, and
+# providers reject a bare `list` annotation. Registered via `__coworker_schema__`.
+#
+# The parameter is `todos`, NOT `items`: a top-level argument key named "items" shadows
+# minijinja's `.items()` map method in at least one hosted chat template (Together's
+# GLM-5.2, 2026-07-21 — "object is not callable"), 400-ing every request that replays
+# the call. Any key name that isn't a minijinja map method is safe; never rename back.
+_TODO_SCHEMA = {
+    "type": "function",
+    "function": {
+        "name": "todo_write",
+        "description": "Replace the task list. Provide the full list of todos each call.",
+        "parameters": {
+            "type": "object",
+            "properties": {
+                "todos": {
+                    "type": "array",
+                    "items": {
+                        "type": "object",
+                        "properties": {
+                            "content": {"type": "string"},
+                            "status": {
+                                "type": "string",
+                                "enum": ["pending", "in_progress", "done"],
+                            },
+                        },
+                        "required": ["content", "status"],
+                    },
+                }
+            },
+            "required": ["todos"],
+        },
+    },
+}
+
+
+@dataclass
+class TodoList:
+    items: list[dict] = field(default_factory=list)
+
+
+def todo_tools(todo: TodoList) -> list:
+    def todo_write(todos: list = None, items: list = None) -> dict:
+        """Replace the task list. Each todo is an object with `content` and a `status`
+        of pending, in_progress, or done."""
+        # `items` stays accepted (models that free-style the old name; queued replays).
+        normalized = []
+        for entry in (todos if todos is not None else items) or []:
+            if isinstance(entry, dict):
+                status = entry.get("status", "pending")
+                if status == "completed":  # common model alias for our "done"
+                    status = "done"
+                normalized.append(
+                    {
+                        "content": str(entry.get("content", "")),
+                        "status": status if status in _STATUSES else "pending",
+                    }
+                )
+            else:
+                normalized.append({"content": str(entry), "status": "pending"})
+        todo.items = normalized
+        return {"count": len(normalized), "todos": normalized}
+
+    wrapped = ai.tool(
+        todo_write,
+        metadata=ai.ToolMetadata(
+            category="planning",
+            risk_level="low",
+            capabilities=["todo"],
+        ),
+    )
+    wrapped.__coworker_schema__ = _TODO_SCHEMA
+    return [wrapped]