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

.claude/launch.json

@@ -0,0 +1,17 @@
+{
+  "version": "0.0.1",
+  "configurations": [
+    {
+      "name": "gui",
+      "runtimeExecutable": "npm",
+      "runtimeArgs": ["run", "dev", "--prefix", "surfaces/gui"],
+      "port": 1420
+    },
+    {
+      "name": "server",
+      "runtimeExecutable": ".venv/Scripts/python.exe",
+      "runtimeArgs": ["-m", "coworker.server.run", "--cwd", "."],
+      "port": 8765
+    }
+  ]
+}