feat(frontend): 标明 OpenAI 认证模式

frontend/src/views/admin/AccountsView.vue

@@ -234,6 +234,7 @@
             <div class="flex min-w-0 flex-col gap-1">
               <div class="flex flex-wrap items-center gap-1">
                 <PlatformTypeBadge :platform="row.platform" :type="row.type"
+                  :auth-mode="getOpenAIAuthMode(row)"
                   :plan-type="getAccountPlanType(row)"
                   :privacy-mode="row.extra?.privacy_mode || row.parent_privacy_mode"
                   :subscription-expires-at="row.credentials?.subscription_expires_at || row.parent_subscription_expires_at" />
@@ -1167,6 +1168,12 @@ function getAccountPlanType(row: any): string | undefined {
   return row.credentials?.plan_type || row.parent_plan_type || undefined
 }
 
+function getOpenAIAuthMode(row: any): string | undefined {
+  if (!row || row.platform !== 'openai' || row.type !== 'oauth') return undefined
+  const authMode = row.credentials?.auth_mode
+  return typeof authMode === 'string' && authMode.trim() ? authMode : undefined
+}
+
 // Antigravity 订阅等级辅助函数
 function getAntigravityTierFromRow(row: any): string | null {
   if (row.platform !== 'antigravity') return null