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/gallery.spec.ts

@@ -0,0 +1,31 @@
+// The Gallery entry point was removed from Settings ▸ Coworkers (owner 2026-08-21) —
+// coworkers install from GitHub / folder / zip. This file keeps the page-level
+// delete flow (now on the coworker detail page, UX-035).
+import { expect } from "@playwright/test";
+import { test } from "./fixtures";
+
+async function openPersonas(page) {
+  await page.goto("/");
+  await page.getByTestId("account-row").click();
+  await page.getByRole("button", { name: "Settings", exact: true }).click();
+  await page.getByRole("button", { name: "Coworkers", exact: true }).click();
+}
+
+test("the Gallery entry point is gone from the Coworkers page", async ({ page }) => {
+  await openPersonas(page);
+  await expect(page.getByTestId("install-disclosure")).toBeVisible();
+  await expect(page.getByTestId("gallery-link")).toHaveCount(0);
+});
+
+test("delete: non-builtin personas removable after confirm; built-ins are not", async ({
+  page,
+}) => {
+  // UX-035: delete moved off the list rows onto the coworker detail page.
+  await openPersonas(page);
+  await expect(page.getByText("Acme Notes")).toBeVisible();
+  await page.getByTestId("persona-configure-acme-notes").click();
+  await page.getByTestId("persona-delete").click();
+  await page.getByTestId("persona-delete-confirm").click();
+  // Back on the list, the row is gone (works signed out).
+  await expect(page.getByText("Acme Notes")).not.toBeVisible();
+});