feat(publish): add baijiahao and jianshu desktop adapters

Wires up Baijiahao (百家号) and Jianshu (简书) as first-class desktop
publish targets, with risk-control prompts surfaced in the runtime
controller and a normalized error message in publish records. Adds
external-link buttons in the publish management table, an asset
format conversion endpoint for cover image compatibility, and
reorders publish-status display priority so failures take precedence
over partial successes.

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

apps/desktop-client/src/main/transport/api-client.ts

@@ -143,6 +143,10 @@ function resolveDesktopURL(path: string): string {
   return new URL(path, transportSession.baseURL).toString();
 }
 
+export function resolveDesktopApiURL(path: string): string {
+  return resolveDesktopURL(path);
+}
+
 function resolveObservedRequestURL(path: string | undefined, baseURL: string): string {
   if (!path) {
     return baseURL;