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>

server/internal/tenant/app/media_service.go

@@ -128,6 +128,7 @@ func (s *MediaService) listArticlePublishRecords(ctx context.Context, tenantID,
 		); err != nil {
 			return nil, response.ErrInternal(50043, "publish_record_scan_failed", err.Error())
 		}
+		normalizePublishRecordForResponse(&item)
 		items = append(items, item)
 	}
 	return items, nil