feat: 从 OpenAI JWT 提取 chatgpt_plan_type 并在前端展示

OAuth 授权和 token 刷新时从 id_token 的 OpenAI auth claim 中
提取 chatgpt_plan_type（plus/team/pro/free），存入 credentials，
账号管理页面 PlatformTypeBadge 显示订阅类型。

backend/internal/pkg/openai/oauth.go

@@ -268,6 +268,7 @@ type IDTokenClaims struct {
 type OpenAIAuthClaims struct {
 	ChatGPTAccountID string              `json:"chatgpt_account_id"`
 	ChatGPTUserID    string              `json:"chatgpt_user_id"`
+	ChatGPTPlanType  string              `json:"chatgpt_plan_type"`
 	UserID           string              `json:"user_id"`
 	Organizations    []OrganizationClaim `json:"organizations"`
 }
@@ -375,6 +376,7 @@ type UserInfo struct {
 	Email            string
 	ChatGPTAccountID string
 	ChatGPTUserID    string
+	PlanType         string
 	UserID           string
 	OrganizationID   string
 	Organizations    []OrganizationClaim
@@ -389,6 +391,7 @@ func (c *IDTokenClaims) GetUserInfo() *UserInfo {
 	if c.OpenAIAuth != nil {
 		info.ChatGPTAccountID = c.OpenAIAuth.ChatGPTAccountID
 		info.ChatGPTUserID = c.OpenAIAuth.ChatGPTUserID
+		info.PlanType = c.OpenAIAuth.ChatGPTPlanType
 		info.UserID = c.OpenAIAuth.UserID
 		info.Organizations = c.OpenAIAuth.Organizations
 

backend/internal/service/openai_oauth_service.go

@@ -130,6 +130,7 @@ type OpenAITokenInfo struct {
 	ChatGPTAccountID string `json:"chatgpt_account_id,omitempty"`
 	ChatGPTUserID    string `json:"chatgpt_user_id,omitempty"`
 	OrganizationID   string `json:"organization_id,omitempty"`
+	PlanType         string `json:"plan_type,omitempty"`
 }
 
 // ExchangeCode exchanges authorization code for tokens
@@ -202,6 +203,7 @@ func (s *OpenAIOAuthService) ExchangeCode(ctx context.Context, input *OpenAIExch
 		tokenInfo.ChatGPTAccountID = userInfo.ChatGPTAccountID
 		tokenInfo.ChatGPTUserID = userInfo.ChatGPTUserID
 		tokenInfo.OrganizationID = userInfo.OrganizationID
+		tokenInfo.PlanType = userInfo.PlanType
 	}
 
 	return tokenInfo, nil
@@ -246,6 +248,7 @@ func (s *OpenAIOAuthService) RefreshTokenWithClientID(ctx context.Context, refre
 		tokenInfo.ChatGPTAccountID = userInfo.ChatGPTAccountID
 		tokenInfo.ChatGPTUserID = userInfo.ChatGPTUserID
 		tokenInfo.OrganizationID = userInfo.OrganizationID
+		tokenInfo.PlanType = userInfo.PlanType
 	}
 
 	return tokenInfo, nil
@@ -510,6 +513,9 @@ func (s *OpenAIOAuthService) BuildAccountCredentials(tokenInfo *OpenAITokenInfo)
 	if tokenInfo.OrganizationID != "" {
 		creds["organization_id"] = tokenInfo.OrganizationID
 	}
+	if tokenInfo.PlanType != "" {
+		creds["plan_type"] = tokenInfo.PlanType
+	}
 	if strings.TrimSpace(tokenInfo.ClientID) != "" {
 		creds["client_id"] = strings.TrimSpace(tokenInfo.ClientID)
 	}

frontend/src/components/common/PlatformTypeBadge.vue

@@ -28,6 +28,10 @@
       <Icon v-else name="key" size="xs" />
       <span>{{ typeLabel }}</span>
     </span>
+    <!-- Plan type part (optional) -->
+    <span v-if="planLabel" :class="['inline-flex items-center gap-1 px-1.5 py-1 border-l border-white/20', typeClass]">
+      <span>{{ planLabel }}</span>
+    </span>
   </div>
 </template>
 
@@ -40,6 +44,7 @@ import Icon from '@/components/icons/Icon.vue'
 interface Props {
   platform: AccountPlatform
   type: AccountType
+  planType?: string
 }
 
 const props = defineProps<Props>()
@@ -65,6 +70,24 @@ const typeLabel = computed(() => {
   }
 })
 
+const planLabel = computed(() => {
+  if (!props.planType) return ''
+  const lower = props.planType.toLowerCase()
+  switch (lower) {
+    case 'plus':
+      return 'Plus'
+    case 'team':
+      return 'Team'
+    case 'chatgptpro':
+    case 'pro':
+      return 'Pro'
+    case 'free':
+      return 'Free'
+    default:
+      return props.planType
+  }
+})
+
 const platformClass = computed(() => {
   if (props.platform === 'anthropic') {
     return 'bg-orange-100 text-orange-700 dark:bg-orange-900/30 dark:text-orange-400'

frontend/src/views/admin/AccountsView.vue

@@ -171,7 +171,7 @@
             <span v-else class="text-sm text-gray-400 dark:text-dark-500">-</span>
           </template>
           <template #cell-platform_type="{ row }">
-            <PlatformTypeBadge :platform="row.platform" :type="row.type" />
+            <PlatformTypeBadge :platform="row.platform" :type="row.type" :plan-type="row.credentials?.plan_type" />
           </template>
           <template #cell-capacity="{ row }">
             <AccountCapacityCell :account="row" />