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

surfaces/gui/vitest.config.ts

@@ -0,0 +1,13 @@
+import { defineConfig } from "vitest/config";
+import react from "@vitejs/plugin-react";
+
+// Standalone test config (kept separate from vite.config.ts so the production `vite build` is
+// untouched). Reused by later frontend phases — add new `*.test.tsx` files under src/.
+export default defineConfig({
+  plugins: [react()],
+  test: {
+    environment: "jsdom",
+    include: ["src/**/*.test.{ts,tsx}"],
+    setupFiles: ["./src/test-setup.ts"],
+  },
+});