feat(dongchedi): translate platform "server exception" into actionable copy

Map dongchedi adapter failures (raw "server exception" or
dongchedi_platform_exception) to a Chinese prompt steering the user to
the dongchedi backend, so renderer/admin views and desktop-task error
payloads no longer surface the opaque platform message.

apps/desktop-client/src/renderer/views/PublishManagementView.vue

@@ -196,7 +196,7 @@ function normalizePublishTaskStatus(status: DesktopTaskInfo['status']): DesktopT
   return status === 'unknown' ? 'failed' : status
 }
 
-function normalizeTaskErrorMessage(message: string | null): string | null {
+function normalizeTaskErrorMessage(message: string | null, platform?: string | null): string | null {
   const normalized = extractString(message)
   if (!normalized) {
     return null
@@ -207,7 +207,7 @@ function normalizeTaskErrorMessage(message: string | null): string | null {
   if (normalized.includes('adapter is not implemented for this platform')) {
     return '当前平台的桌面发布适配器未实现，任务已按失败处理。'
   }
-  return normalizePublisherErrorMessage(normalized) ?? normalized
+  return normalizePublisherErrorMessage(normalized, platform) ?? normalized
 }
 
 function complianceLevelLabel(level: string | null): string {
@@ -607,6 +607,7 @@ const publishTasks = computed<PublishTaskItem[]>(() =>
           extractString(taskError.message) ??
           extractString(taskError.detail) ??
           extractString(taskError.code),
+        task.platform,
       ),
       complianceBlockedRecordId,
       complianceBlockedAt: task.compliance_blocked_at ? parseTimestamp(task.compliance_blocked_at) : null,