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/available-detail.spec.ts

@@ -0,0 +1,48 @@
+// Pre-connect connector detail page (UX-DECISIONS §38): an AVAILABLE row
+// navigates to a subpage with the About paragraph, honest Access bullets, and
+// the tool list behind a collapsed disclosure; Connect opens the same modal as
+// the list's pill (which itself must NOT navigate).
+import { expect } from "@playwright/test";
+import { test } from "./fixtures";
+
+async function openConnectors(page) {
+  await page.goto("/");
+  await page.getByTestId("account-row").click();
+  await page.getByRole("button", { name: "Connectors", exact: true }).click();
+}
+
+test("available row opens the pre-connect detail page", async ({ page }) => {
+  await openConnectors(page);
+  await page.getByTestId("connector-gmail").click();
+
+  const detail = page.getByTestId("available-detail");
+  await expect(detail).toContainText("Search, summarize, and send over your Gmail.");
+  await expect(page.getByTestId("available-access")).toContainText("Reads and searches your mail.");
+  await expect(detail).toContainText("Keys and tokens are stored only on this computer");
+
+  // Tools are a collapsed disclosure — advanced detail, closed by default.
+  await expect(detail).toContainText("2 tools this connector adds");
+  await expect(detail).not.toContainText("Send email");
+  await page.getByTestId("available-tools-toggle").click();
+  await expect(detail).toContainText("Send email");
+  await expect(detail).toContainText("asks first"); // write tools carry the tag
+
+  // Breadcrumb returns to the list.
+  await page.getByTestId("connectors-breadcrumb").click();
+  await expect(page.getByTestId("connector-gmail")).toBeVisible();
+});
+
+test("detail Connect opens the modal; the list pill skips navigation", async ({ page }) => {
+  await openConnectors(page);
+  await page.getByTestId("connector-gmail").click();
+  await page.getByTestId("available-connect").click();
+  await expect(page.getByTestId("add-connection-modal")).toBeVisible();
+  await page.keyboard.press("Escape");
+  await expect(page.getByTestId("add-connection-modal")).not.toBeVisible();
+
+  // Back on the list, the pill goes straight to the modal — no detail page.
+  await page.getByTestId("connectors-breadcrumb").click();
+  await page.getByTestId("connector-gmail").getByRole("button", { name: "Connect" }).click();
+  await expect(page.getByTestId("add-connection-modal")).toBeVisible();
+  await expect(page.getByTestId("available-detail")).not.toBeVisible();
+});