feat(publish): handle qiehao real-name auth via shared publisher errors

- Detect qiehao's real-name auth blocking response (code/message) in the
  desktop adapter, surface a Chinese-friendly summary, and propagate the
  detail through the failure result.
- Extract a shared publisher-errors module so the renderer can normalize
  these messages for the publish task table without duplicating regex.
- Pre-process article HTML for qiehao before upload via a new
  packages/publisher-platforms/src/qiehao.ts entry point.
- Update the manual self-test notes for jianshu and qiehao with the
  latest results.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/desktop-client/src/shared/publisher-errors.test.ts

@@ -0,0 +1,25 @@
+import { describe, expect, it } from "vitest";
+
+import {
+  QIEHAO_REAL_NAME_AUTH_MESSAGE,
+  isQiehaoRealNameAuthError,
+  normalizePublisherErrorMessage,
+  normalizeQiehaoPublishErrorMessage,
+} from "./publisher-errors";
+
+describe("publisher error normalization", () => {
+  it("normalizes Qiehao real-name authentication failures from raw platform text", () => {
+    expect(
+      normalizePublisherErrorMessage("type:business, code:-5022, msg:user is not real name authentication"),
+    ).toBe(QIEHAO_REAL_NAME_AUTH_MESSAGE);
+  });
+
+  it("recognizes Qiehao real-name authentication failures by business code", () => {
+    expect(isQiehaoRealNameAuthError("publish rejected", -5022)).toBe(true);
+    expect(normalizeQiehaoPublishErrorMessage("publish rejected", -5022)).toBe(QIEHAO_REAL_NAME_AUTH_MESSAGE);
+  });
+
+  it("leaves unknown publisher errors unchanged", () => {
+    expect(normalizePublisherErrorMessage("qiehao_publish_failed")).toBe("qiehao_publish_failed");
+  });
+});