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/e2e-live/persistence.spec.ts

@@ -0,0 +1,33 @@
+import { test, expect } from "@playwright/test";
+import { scratchBaseIfReady, selectMode, sendTask, startCoworkSession } from "./helpers";
+
+// LIVE #6 — persistence & resume. After a completed turn, reloading the page must not lose the work:
+// the session persists in the sidebar and reopens with its full transcript and its artifact. We
+// reopen it explicitly (rather than relying on which session auto-restores — several sessions can
+// share the same updated_at second). Excluded from CI — run with `npm run e2e:live`.
+
+test("live: a session's transcript and artifact survive a page reload", async ({ page }) => {
+  const scratchBase = await scratchBaseIfReady();
+  test.skip(!scratchBase, "live backend not ready — start openworker-server and configure a model");
+
+  const token = `PERSIST-${Date.now()}`;
+  // Unique filename — appears early in the session title (so it survives title truncation and is a
+  // reliable click target in the sidebar), and is the artifact name.
+  const name = `note-${Date.now()}.txt`;
+
+  await startCoworkSession(page);
+  await selectMode(page, "Full access");
+  await sendTask(page, `Write a file named ${name} containing exactly: ${token}`);
+
+  // Turn finishes (artifact lands) and the token is in the transcript.
+  await expect(page.getByText(/Artifacts \(\d+\)/)).toBeVisible({ timeout: 150_000 });
+  await expect(page.getByText(token).first()).toBeVisible();
+
+  // Reload, then reopen this session from the sidebar (it must have persisted there).
+  await page.reload();
+  await page.getByText(name).first().click({ timeout: 60_000 });
+
+  // Reopened with its transcript restored (the token) and its artifact back on the rail.
+  await expect(page.getByText(token).first()).toBeVisible({ timeout: 30_000 });
+  await expect(page.getByText(/Artifacts \(\d+\)/)).toBeVisible({ timeout: 30_000 });
+});