feat(gemini): 完善 Gemini OAuth 配额系统和用量显示

主要改动：
- 后端：重构 Gemini 配额服务，支持多层级配额策略（GCP Standard/Free, Google One, AI Studio, Code Assist）
- 后端：优化 OAuth 服务，增强 tier_id 识别和存储逻辑
- 后端：改进用量统计服务，支持不同平台的配额查询
- 后端：优化限流服务，增加临时解除调度状态管理
- 前端：统一四种授权方式的用量显示格式和徽标样式
- 前端：增强账户配额信息展示，支持多种配额类型
- 前端：改进创建和重新授权模态框的用户体验
- 国际化：完善中英文配额相关文案
- 移除 CHANGELOG.md 文件

测试：所有单元测试通过

frontend/src/components/account/AccountQuotaInfo.vue

@@ -65,32 +65,33 @@ const tierLabel = computed(() => {
   const creds = props.account.credentials as GeminiCredentials | undefined
 
   if (isCodeAssist.value) {
-    // GCP Code Assist: 显示 GCP tier
-    const tierMap: Record<string, string> = {
-      LEGACY: 'Free',
-      PRO: 'Pro',
-      ULTRA: 'Ultra',
-      'standard-tier': 'Standard',
-      'pro-tier': 'Pro',
-      'ultra-tier': 'Ultra'
-    }
-    return tierMap[creds?.tier_id || ''] || (creds?.tier_id ? 'GCP' : 'Unknown')
+    const tier = (creds?.tier_id || '').toString().trim().toLowerCase()
+    if (tier === 'gcp_enterprise') return 'GCP Enterprise'
+    if (tier === 'gcp_standard') return 'GCP Standard'
+    // Backward compatibility
+    const upper = (creds?.tier_id || '').toString().trim().toUpperCase()
+    if (upper.includes('ULTRA') || upper.includes('ENTERPRISE')) return 'GCP Enterprise'
+    if (upper) return `GCP ${upper}`
+    return 'GCP'
   }
 
   if (isGoogleOne.value) {
-    // Google One: tier 映射
-    const tierMap: Record<string, string> = {
-      AI_PREMIUM: 'AI Premium',
-      GOOGLE_ONE_STANDARD: 'Standard',
-      GOOGLE_ONE_BASIC: 'Basic',
-      FREE: 'Free',
-      GOOGLE_ONE_UNKNOWN: 'Personal',
-      GOOGLE_ONE_UNLIMITED: 'Unlimited'
-    }
-    return tierMap[creds?.tier_id || ''] || 'Personal'
+    const tier = (creds?.tier_id || '').toString().trim().toLowerCase()
+    if (tier === 'google_ai_ultra') return 'Google AI Ultra'
+    if (tier === 'google_ai_pro') return 'Google AI Pro'
+    if (tier === 'google_one_free') return 'Google One Free'
+    // Backward compatibility
+    const upper = (creds?.tier_id || '').toString().trim().toUpperCase()
+    if (upper === 'AI_PREMIUM') return 'Google AI Pro'
+    if (upper === 'GOOGLE_ONE_UNLIMITED') return 'Google AI Ultra'
+    if (upper) return `Google One ${upper}`
+    return 'Google One'
   }
 
   // API Key: 显示 AI Studio
+  const tier = (creds?.tier_id || '').toString().trim().toLowerCase()
+  if (tier === 'aistudio_paid') return 'AI Studio Pay-as-you-go'
+  if (tier === 'aistudio_free') return 'AI Studio Free Tier'
   return 'AI Studio'
 })
 
@@ -99,35 +100,31 @@ const tierBadgeClass = computed(() => {
   const creds = props.account.credentials as GeminiCredentials | undefined
 
   if (isCodeAssist.value) {
-    // GCP Code Assist 样式
-    const tierColorMap: Record<string, string> = {
-      LEGACY: 'bg-gray-100 text-gray-600 dark:bg-gray-700 dark:text-gray-300',
-      PRO: 'bg-blue-100 text-blue-600 dark:bg-blue-900/40 dark:text-blue-300',
-      ULTRA: 'bg-purple-100 text-purple-600 dark:bg-purple-900/40 dark:text-purple-300',
-      'standard-tier': 'bg-green-100 text-green-600 dark:bg-green-900/40 dark:text-green-300',
-      'pro-tier': 'bg-blue-100 text-blue-600 dark:bg-blue-900/40 dark:text-blue-300',
-      'ultra-tier': 'bg-purple-100 text-purple-600 dark:bg-purple-900/40 dark:text-purple-300'
-    }
-    return (
-      tierColorMap[creds?.tier_id || ''] ||
-      'bg-gray-100 text-gray-600 dark:bg-gray-700 dark:text-gray-300'
-    )
+    const tier = (creds?.tier_id || '').toString().trim().toLowerCase()
+    if (tier === 'gcp_enterprise') return 'bg-purple-100 text-purple-600 dark:bg-purple-900/40 dark:text-purple-300'
+    if (tier === 'gcp_standard') return 'bg-blue-100 text-blue-600 dark:bg-blue-900/40 dark:text-blue-300'
+    // Backward compatibility
+    const upper = (creds?.tier_id || '').toString().trim().toUpperCase()
+    if (upper.includes('ULTRA') || upper.includes('ENTERPRISE')) return 'bg-purple-100 text-purple-600 dark:bg-purple-900/40 dark:text-purple-300'
+    return 'bg-blue-100 text-blue-600 dark:bg-blue-900/40 dark:text-blue-300'
   }
 
   if (isGoogleOne.value) {
-    // Google One tier 样式
-    const tierColorMap: Record<string, string> = {
-      AI_PREMIUM: 'bg-purple-100 text-purple-600 dark:bg-purple-900/40 dark:text-purple-300',
-      GOOGLE_ONE_STANDARD: 'bg-blue-100 text-blue-600 dark:bg-blue-900/40 dark:text-blue-300',
-      GOOGLE_ONE_BASIC: 'bg-green-100 text-green-600 dark:bg-green-900/40 dark:text-green-300',
-      FREE: 'bg-gray-100 text-gray-600 dark:bg-gray-700 dark:text-gray-300',
-      GOOGLE_ONE_UNKNOWN: 'bg-gray-100 text-gray-600 dark:bg-gray-700 dark:text-gray-300',
-      GOOGLE_ONE_UNLIMITED: 'bg-amber-100 text-amber-600 dark:bg-amber-900/40 dark:text-amber-300'
-    }
-    return tierColorMap[creds?.tier_id || ''] || 'bg-gray-100 text-gray-600 dark:bg-gray-700 dark:text-gray-300'
+    const tier = (creds?.tier_id || '').toString().trim().toLowerCase()
+    if (tier === 'google_ai_ultra') return 'bg-purple-100 text-purple-600 dark:bg-purple-900/40 dark:text-purple-300'
+    if (tier === 'google_ai_pro') return 'bg-blue-100 text-blue-600 dark:bg-blue-900/40 dark:text-blue-300'
+    if (tier === 'google_one_free') return 'bg-gray-100 text-gray-600 dark:bg-gray-700 dark:text-gray-300'
+    // Backward compatibility
+    const upper = (creds?.tier_id || '').toString().trim().toUpperCase()
+    if (upper === 'GOOGLE_ONE_UNLIMITED') return 'bg-purple-100 text-purple-600 dark:bg-purple-900/40 dark:text-purple-300'
+    if (upper === 'AI_PREMIUM') return 'bg-blue-100 text-blue-600 dark:bg-blue-900/40 dark:text-blue-300'
+    return 'bg-gray-100 text-gray-600 dark:bg-gray-700 dark:text-gray-300'
   }
 
   // AI Studio 默认样式：蓝色
+  const tier = (creds?.tier_id || '').toString().trim().toLowerCase()
+  if (tier === 'aistudio_paid') return 'bg-blue-100 text-blue-600 dark:bg-blue-900/40 dark:text-blue-300'
+  if (tier === 'aistudio_free') return 'bg-gray-100 text-gray-600 dark:bg-gray-700 dark:text-gray-300'
   return 'bg-blue-100 text-blue-600 dark:bg-blue-900/40 dark:text-blue-300'
 })
 

frontend/src/components/account/AccountUsageCell.vue

@@ -241,23 +241,16 @@
         <div v-else-if="error" class="text-xs text-red-500">
           {{ error }}
         </div>
-        <!-- GCP & Google One: show model usage bars when available -->
+        <!-- Gemini: show daily usage bars when available -->
         <div v-else-if="geminiUsageAvailable" class="space-y-1">
           <UsageProgressBar
-            v-if="usageInfo?.gemini_pro_daily"
-            label="Pro"
-            :utilization="usageInfo.gemini_pro_daily.utilization"
-            :resets-at="usageInfo.gemini_pro_daily.resets_at"
-            :window-stats="usageInfo.gemini_pro_daily.window_stats"
-            color="indigo"
-          />
-          <UsageProgressBar
-            v-if="usageInfo?.gemini_flash_daily"
-            label="Flash"
-            :utilization="usageInfo.gemini_flash_daily.utilization"
-            :resets-at="usageInfo.gemini_flash_daily.resets_at"
-            :window-stats="usageInfo.gemini_flash_daily.window_stats"
-            color="emerald"
+            v-for="bar in geminiUsageBars"
+            :key="bar.key"
+            :label="bar.label"
+            :utilization="bar.utilization"
+            :resets-at="bar.resetsAt"
+            :window-stats="bar.windowStats"
+            :color="bar.color"
           />
           <p class="mt-1 text-[9px] leading-tight text-gray-400 dark:text-gray-500 italic">
             * {{ t('admin.accounts.gemini.quotaPolicy.simulatedNote') || 'Simulated quota' }}
@@ -288,7 +281,7 @@
 import { ref, computed, onMounted } from 'vue'
 import { useI18n } from 'vue-i18n'
 import { adminAPI } from '@/api/admin'
-import type { Account, AccountUsageInfo, GeminiCredentials } from '@/types'
+import type { Account, AccountUsageInfo, GeminiCredentials, WindowStats } from '@/types'
 import UsageProgressBar from './UsageProgressBar.vue'
 import AccountQuotaInfo from './AccountQuotaInfo.vue'
 
@@ -303,16 +296,18 @@ const error = ref<string | null>(null)
 const usageInfo = ref<AccountUsageInfo | null>(null)
 
 // Show usage windows for OAuth and Setup Token accounts
-const showUsageWindows = computed(
-  () => props.account.type === 'oauth' || props.account.type === 'setup-token'
-)
+const showUsageWindows = computed(() => {
+  // Gemini: we can always compute local usage windows from DB logs (simulated quotas).
+  if (props.account.platform === 'gemini') return true
+  return props.account.type === 'oauth' || props.account.type === 'setup-token'
+})
 
 const shouldFetchUsage = computed(() => {
   if (props.account.platform === 'anthropic') {
     return props.account.type === 'oauth' || props.account.type === 'setup-token'
   }
   if (props.account.platform === 'gemini') {
-    return props.account.type === 'oauth'
+    return true
   }
   if (props.account.platform === 'antigravity') {
     return props.account.type === 'oauth'
@@ -322,8 +317,12 @@ const shouldFetchUsage = computed(() => {
 
 const geminiUsageAvailable = computed(() => {
   return (
+    !!usageInfo.value?.gemini_shared_daily ||
     !!usageInfo.value?.gemini_pro_daily ||
-    !!usageInfo.value?.gemini_flash_daily
+    !!usageInfo.value?.gemini_flash_daily ||
+    !!usageInfo.value?.gemini_shared_minute ||
+    !!usageInfo.value?.gemini_pro_minute ||
+    !!usageInfo.value?.gemini_flash_minute
   )
 })
 
@@ -569,6 +568,12 @@ const geminiTier = computed(() => {
   return creds?.tier_id || null
 })
 
+const geminiOAuthType = computed(() => {
+  if (props.account.platform !== 'gemini') return null
+  const creds = props.account.credentials as GeminiCredentials | undefined
+  return (creds?.oauth_type || '').trim() || null
+})
+
 // Gemini 是否为 Code Assist OAuth
 const isGeminiCodeAssist = computed(() => {
   if (props.account.platform !== 'gemini') return false
@@ -576,109 +581,208 @@ const isGeminiCodeAssist = computed(() => {
   return creds?.oauth_type === 'code_assist' || (!creds?.oauth_type && !!creds?.project_id)
 })
 
-// Gemini 认证类型 + Tier 组合标签（简洁版）
-const geminiAuthTypeLabel = computed(() => {
-  const creds = props.account.credentials as GeminiCredentials | undefined
-  const oauthType = creds?.oauth_type
+const geminiChannelShort = computed((): 'ai studio' | 'gcp' | 'google one' | 'client' | null => {
+  if (props.account.platform !== 'gemini') return null
 
-  // For API Key accounts, don't show auth type label
-  if (props.account.type !== 'oauth') return null
+  // API Key accounts are AI Studio.
+  if (props.account.type === 'apikey') return 'ai studio'
 
-  if (oauthType === 'google_one') {
-    // Google One: show "Google One" + tier
-    const tierMap: Record<string, string> = {
-      AI_PREMIUM: 'AI Premium',
-      GOOGLE_ONE_STANDARD: 'Standard',
-      GOOGLE_ONE_BASIC: 'Basic',
-      FREE: 'Free',
-      GOOGLE_ONE_UNKNOWN: 'Personal',
-      GOOGLE_ONE_UNLIMITED: 'Unlimited'
-    }
-    const tierLabel = geminiTier.value ? tierMap[geminiTier.value] || 'Personal' : 'Personal'
-    return `Google One ${tierLabel}`
-  } else if (oauthType === 'code_assist' || (!oauthType && isGeminiCodeAssist.value)) {
-    // Code Assist: show "GCP" + tier
-    const tierMap: Record<string, string> = {
-      LEGACY: 'Free',
-      PRO: 'Pro',
-      ULTRA: 'Ultra'
-    }
-    const tierLabel = geminiTier.value ? tierMap[geminiTier.value] || 'Free' : 'Free'
-    return `GCP ${tierLabel}`
-  } else if (oauthType === 'ai_studio') {
-    // 自定义 OAuth Client: show "Client" (no tier)
-    return 'Client'
+  if (geminiOAuthType.value === 'google_one') return 'google one'
+  if (isGeminiCodeAssist.value) return 'gcp'
+  if (geminiOAuthType.value === 'ai_studio') return 'client'
+
+  // Fallback (unknown legacy data): treat as AI Studio.
+  return 'ai studio'
+})
+
+const geminiUserLevel = computed((): string | null => {
+  if (props.account.platform !== 'gemini') return null
+
+  const tier = (geminiTier.value || '').toString().trim()
+  const tierLower = tier.toLowerCase()
+  const tierUpper = tier.toUpperCase()
+
+  // Google One: free / pro / ultra
+  if (geminiOAuthType.value === 'google_one') {
+    if (tierLower === 'google_one_free') return 'free'
+    if (tierLower === 'google_ai_pro') return 'pro'
+    if (tierLower === 'google_ai_ultra') return 'ultra'
+
+    // Backward compatibility (legacy tier markers)
+    if (tierUpper === 'AI_PREMIUM' || tierUpper === 'GOOGLE_ONE_STANDARD') return 'pro'
+    if (tierUpper === 'GOOGLE_ONE_UNLIMITED') return 'ultra'
+    if (tierUpper === 'FREE' || tierUpper === 'GOOGLE_ONE_BASIC' || tierUpper === 'GOOGLE_ONE_UNKNOWN' || tierUpper === '') return 'free'
+
+    return null
+  }
+
+  // GCP Code Assist: standard / enterprise
+  if (isGeminiCodeAssist.value) {
+    if (tierLower === 'gcp_enterprise') return 'enterprise'
+    if (tierLower === 'gcp_standard') return 'standard'
+
+    // Backward compatibility
+    if (tierUpper.includes('ULTRA') || tierUpper.includes('ENTERPRISE')) return 'enterprise'
+    return 'standard'
+  }
+
+  // AI Studio (API Key) and Client OAuth: free / paid
+  if (props.account.type === 'apikey' || geminiOAuthType.value === 'ai_studio') {
+    if (tierLower === 'aistudio_paid') return 'paid'
+    if (tierLower === 'aistudio_free') return 'free'
+
+    // Backward compatibility
+    if (tierUpper.includes('PAID') || tierUpper.includes('PAYG') || tierUpper.includes('PAY')) return 'paid'
+    if (tierUpper.includes('FREE')) return 'free'
+    if (props.account.type === 'apikey') return 'free'
+    return null
   }
 
   return null
 })
 
+// Gemini 认证类型（按要求：授权方式简称 + 用户等级）
+const geminiAuthTypeLabel = computed(() => {
+  if (props.account.platform !== 'gemini') return null
+  if (!geminiChannelShort.value) return null
+  return geminiUserLevel.value ? `${geminiChannelShort.value} ${geminiUserLevel.value}` : geminiChannelShort.value
+})
+
 // Gemini 账户类型徽章样式（统一样式）
 const geminiTierClass = computed(() => {
-  const creds = props.account.credentials as GeminiCredentials | undefined
-  const oauthType = creds?.oauth_type
+  // Use channel+level to choose a stable color without depending on raw tier_id variants.
+  const channel = geminiChannelShort.value
+  const level = geminiUserLevel.value
 
-  // Client (自定义 OAuth): 使用蓝色（与 AI Studio 一致）
-  if (oauthType === 'ai_studio') {
+  if (channel === 'client' || channel === 'ai studio') {
     return 'bg-blue-100 text-blue-600 dark:bg-blue-900/40 dark:text-blue-300'
   }
 
-  if (!geminiTier.value) return ''
-
-  const isGoogleOne = creds?.oauth_type === 'google_one'
-
-  if (isGoogleOne) {
-    // Google One tier 颜色
-    const colorMap: Record<string, string> = {
-      AI_PREMIUM: 'bg-purple-100 text-purple-600 dark:bg-purple-900/40 dark:text-purple-300',
-      GOOGLE_ONE_STANDARD: 'bg-blue-100 text-blue-600 dark:bg-blue-900/40 dark:text-blue-300',
-      GOOGLE_ONE_BASIC: 'bg-green-100 text-green-600 dark:bg-green-900/40 dark:text-green-300',
-      FREE: 'bg-gray-100 text-gray-600 dark:bg-gray-700 dark:text-gray-300',
-      GOOGLE_ONE_UNKNOWN: 'bg-gray-100 text-gray-600 dark:bg-gray-700 dark:text-gray-300',
-      GOOGLE_ONE_UNLIMITED: 'bg-amber-100 text-amber-600 dark:bg-amber-900/40 dark:text-amber-300'
-    }
-    return colorMap[geminiTier.value] || 'bg-gray-100 text-gray-600 dark:bg-gray-700 dark:text-gray-300'
+  if (channel === 'google one') {
+    if (level === 'ultra') return 'bg-purple-100 text-purple-600 dark:bg-purple-900/40 dark:text-purple-300'
+    if (level === 'pro') return 'bg-blue-100 text-blue-600 dark:bg-blue-900/40 dark:text-blue-300'
+    return 'bg-gray-100 text-gray-600 dark:bg-gray-700 dark:text-gray-300'
   }
 
-  // Code Assist tier 颜色
-  switch (geminiTier.value) {
-    case 'LEGACY':
-      return 'bg-gray-100 text-gray-600 dark:bg-gray-700 dark:text-gray-300'
-    case 'PRO':
-      return 'bg-blue-100 text-blue-600 dark:bg-blue-900/40 dark:text-blue-300'
-    case 'ULTRA':
-      return 'bg-purple-100 text-purple-600 dark:bg-purple-900/40 dark:text-purple-300'
-    default:
-      return ''
+  if (channel === 'gcp') {
+    if (level === 'enterprise') return 'bg-purple-100 text-purple-600 dark:bg-purple-900/40 dark:text-purple-300'
+    return 'bg-blue-100 text-blue-600 dark:bg-blue-900/40 dark:text-blue-300'
   }
+
+  return ''
 })
 
 // Gemini 配额政策信息
 const geminiQuotaPolicyChannel = computed(() => {
+  if (geminiOAuthType.value === 'google_one') {
+    return t('admin.accounts.gemini.quotaPolicy.rows.googleOne.channel')
+  }
   if (isGeminiCodeAssist.value) {
-    return t('admin.accounts.gemini.quotaPolicy.rows.cli.channel')
+    return t('admin.accounts.gemini.quotaPolicy.rows.gcp.channel')
   }
   return t('admin.accounts.gemini.quotaPolicy.rows.aiStudio.channel')
 })
 
 const geminiQuotaPolicyLimits = computed(() => {
-  if (isGeminiCodeAssist.value) {
-    if (geminiTier.value === 'PRO' || geminiTier.value === 'ULTRA') {
-      return t('admin.accounts.gemini.quotaPolicy.rows.cli.limitsPremium')
+  const tierLower = (geminiTier.value || '').toString().trim().toLowerCase()
+
+  if (geminiOAuthType.value === 'google_one') {
+    if (tierLower === 'google_ai_ultra' || geminiUserLevel.value === 'ultra') {
+      return t('admin.accounts.gemini.quotaPolicy.rows.googleOne.limitsUltra')
     }
-    return t('admin.accounts.gemini.quotaPolicy.rows.cli.limitsFree')
+    if (tierLower === 'google_ai_pro' || geminiUserLevel.value === 'pro') {
+      return t('admin.accounts.gemini.quotaPolicy.rows.googleOne.limitsPro')
+    }
+    return t('admin.accounts.gemini.quotaPolicy.rows.googleOne.limitsFree')
+  }
+
+  if (isGeminiCodeAssist.value) {
+    if (tierLower === 'gcp_enterprise' || geminiUserLevel.value === 'enterprise') {
+      return t('admin.accounts.gemini.quotaPolicy.rows.gcp.limitsEnterprise')
+    }
+    return t('admin.accounts.gemini.quotaPolicy.rows.gcp.limitsStandard')
+  }
+
+  // AI Studio (API Key / custom OAuth)
+  if (tierLower === 'aistudio_paid' || geminiUserLevel.value === 'paid') {
+    return t('admin.accounts.gemini.quotaPolicy.rows.aiStudio.limitsPaid')
   }
-  // AI Studio - 默认显示免费层限制
   return t('admin.accounts.gemini.quotaPolicy.rows.aiStudio.limitsFree')
 })
 
 const geminiQuotaPolicyDocsUrl = computed(() => {
-  if (isGeminiCodeAssist.value) {
-    return 'https://cloud.google.com/products/gemini/code-assist#pricing'
+  if (geminiOAuthType.value === 'google_one' || isGeminiCodeAssist.value) {
+    return 'https://developers.google.com/gemini-code-assist/resources/quotas'
   }
   return 'https://ai.google.dev/pricing'
 })
 
+const geminiUsesSharedDaily = computed(() => {
+  if (props.account.platform !== 'gemini') return false
+  // Per requirement: Google One & GCP are shared RPD pools (no per-model breakdown).
+  return (
+    !!usageInfo.value?.gemini_shared_daily ||
+    !!usageInfo.value?.gemini_shared_minute ||
+    geminiOAuthType.value === 'google_one' ||
+    isGeminiCodeAssist.value
+  )
+})
+
+const geminiUsageBars = computed(() => {
+  if (props.account.platform !== 'gemini') return []
+  if (!usageInfo.value) return []
+
+  const bars: Array<{
+    key: string
+    label: string
+    utilization: number
+    resetsAt: string | null
+    windowStats?: WindowStats | null
+    color: 'indigo' | 'emerald'
+  }> = []
+
+  if (geminiUsesSharedDaily.value) {
+    const sharedDaily = usageInfo.value.gemini_shared_daily
+    if (sharedDaily) {
+      bars.push({
+        key: 'shared_daily',
+        label: '1d',
+        utilization: sharedDaily.utilization,
+        resetsAt: sharedDaily.resets_at,
+        windowStats: sharedDaily.window_stats,
+        color: 'indigo'
+      })
+    }
+    return bars
+  }
+
+  const pro = usageInfo.value.gemini_pro_daily
+  if (pro) {
+    bars.push({
+      key: 'pro_daily',
+      label: 'pro',
+      utilization: pro.utilization,
+      resetsAt: pro.resets_at,
+      windowStats: pro.window_stats,
+      color: 'indigo'
+      })
+  }
+
+  const flash = usageInfo.value.gemini_flash_daily
+  if (flash) {
+    bars.push({
+      key: 'flash_daily',
+      label: 'flash',
+      utilization: flash.utilization,
+      resetsAt: flash.resets_at,
+      windowStats: flash.window_stats,
+      color: 'emerald'
+    })
+  }
+
+  return bars
+})
+
 // 账户类型显示标签
 const antigravityTierLabel = computed(() => {
   switch (antigravityTier.value) {

frontend/src/components/account/CreateAccountModal.vue

@@ -653,6 +653,41 @@
           </div>
         </div>
 
+        <!-- Tier selection (used as fallback when auto-detection is unavailable/fails) -->
+        <div class="mt-4">
+          <label class="input-label">{{ t('admin.accounts.gemini.tier.label') }}</label>
+          <div class="mt-2">
+            <select
+              v-if="geminiOAuthType === 'google_one'"
+              v-model="geminiTierGoogleOne"
+              class="input"
+            >
+              <option value="google_one_free">{{ t('admin.accounts.gemini.tier.googleOne.free') }}</option>
+              <option value="google_ai_pro">{{ t('admin.accounts.gemini.tier.googleOne.pro') }}</option>
+              <option value="google_ai_ultra">{{ t('admin.accounts.gemini.tier.googleOne.ultra') }}</option>
+            </select>
+
+            <select
+              v-else-if="geminiOAuthType === 'code_assist'"
+              v-model="geminiTierGcp"
+              class="input"
+            >
+              <option value="gcp_standard">{{ t('admin.accounts.gemini.tier.gcp.standard') }}</option>
+              <option value="gcp_enterprise">{{ t('admin.accounts.gemini.tier.gcp.enterprise') }}</option>
+            </select>
+
+            <select
+              v-else
+              v-model="geminiTierAIStudio"
+              class="input"
+            >
+              <option value="aistudio_free">{{ t('admin.accounts.gemini.tier.aiStudio.free') }}</option>
+              <option value="aistudio_paid">{{ t('admin.accounts.gemini.tier.aiStudio.paid') }}</option>
+            </select>
+          </div>
+          <p class="input-hint">{{ t('admin.accounts.gemini.tier.hint') }}</p>
+        </div>
+
         <div class="mt-4 rounded-lg border border-blue-200 bg-blue-50 p-4 text-xs text-blue-900 dark:border-blue-800/40 dark:bg-blue-900/20 dark:text-blue-200">
           <div class="flex items-start gap-3">
             <svg
@@ -820,6 +855,16 @@
           <p class="input-hint">{{ apiKeyHint }}</p>
         </div>
 
+        <!-- Gemini API Key tier selection -->
+        <div v-if="form.platform === 'gemini'">
+          <label class="input-label">{{ t('admin.accounts.gemini.tier.label') }}</label>
+          <select v-model="geminiTierAIStudio" class="input">
+            <option value="aistudio_free">{{ t('admin.accounts.gemini.tier.aiStudio.free') }}</option>
+            <option value="aistudio_paid">{{ t('admin.accounts.gemini.tier.aiStudio.paid') }}</option>
+          </select>
+          <p class="input-hint">{{ t('admin.accounts.gemini.tier.aiStudioHint') }}</p>
+        </div>
+
         <!-- Model Restriction Section (不适用于 Gemini) -->
         <div v-if="form.platform !== 'gemini'" class="border-t border-gray-200 pt-4 dark:border-dark-600">
           <label class="input-label">{{ t('admin.accounts.modelRestriction') }}</label>
@@ -1816,6 +1861,24 @@ const geminiOAuthType = ref<'code_assist' | 'google_one' | 'ai_studio'>('google_
 const geminiAIStudioOAuthEnabled = ref(false)
 const showAdvancedOAuth = ref(false)
 
+// Gemini tier selection (used as fallback when auto-detection is unavailable/fails)
+const geminiTierGoogleOne = ref<'google_one_free' | 'google_ai_pro' | 'google_ai_ultra'>('google_one_free')
+const geminiTierGcp = ref<'gcp_standard' | 'gcp_enterprise'>('gcp_standard')
+const geminiTierAIStudio = ref<'aistudio_free' | 'aistudio_paid'>('aistudio_free')
+
+const geminiSelectedTier = computed(() => {
+  if (form.platform !== 'gemini') return ''
+  if (accountCategory.value === 'apikey') return geminiTierAIStudio.value
+  switch (geminiOAuthType.value) {
+    case 'google_one':
+      return geminiTierGoogleOne.value
+    case 'code_assist':
+      return geminiTierGcp.value
+    default:
+      return geminiTierAIStudio.value
+  }
+})
+
 const geminiQuotaDocs = {
   codeAssist: 'https://developers.google.com/gemini-code-assist/resources/quotas',
   aiStudio: 'https://ai.google.dev/pricing',
@@ -2143,6 +2206,9 @@ const resetForm = () => {
   tempUnschedEnabled.value = false
   tempUnschedRules.value = []
   geminiOAuthType.value = 'code_assist'
+  geminiTierGoogleOne.value = 'google_one_free'
+  geminiTierGcp.value = 'gcp_standard'
+  geminiTierAIStudio.value = 'aistudio_free'
   oauth.resetState()
   openaiOAuth.resetState()
   geminiOAuth.resetState()
@@ -2184,6 +2250,9 @@ const handleSubmit = async () => {
     base_url: apiKeyBaseUrl.value.trim() || defaultBaseUrl,
     api_key: apiKeyValue.value.trim()
   }
+  if (form.platform === 'gemini') {
+    credentials.tier_id = geminiTierAIStudio.value
+  }
 
   // Add model mapping if configured
   const modelMapping = buildModelMappingObject(modelRestrictionMode.value, allowedModels.value, modelMappings.value)
@@ -2237,7 +2306,12 @@ const handleGenerateUrl = async () => {
   if (form.platform === 'openai') {
     await openaiOAuth.generateAuthUrl(form.proxy_id)
   } else if (form.platform === 'gemini') {
-    await geminiOAuth.generateAuthUrl(form.proxy_id, oauthFlowRef.value?.projectId, geminiOAuthType.value)
+    await geminiOAuth.generateAuthUrl(
+      form.proxy_id,
+      oauthFlowRef.value?.projectId,
+      geminiOAuthType.value,
+      geminiSelectedTier.value
+    )
   } else if (form.platform === 'antigravity') {
     await antigravityOAuth.generateAuthUrl(form.proxy_id)
   } else {
@@ -2318,7 +2392,8 @@ const handleGeminiExchange = async (authCode: string) => {
       sessionId: geminiOAuth.sessionId.value,
       state: stateToUse,
       proxyId: form.proxy_id,
-      oauthType: geminiOAuthType.value
+      oauthType: geminiOAuthType.value,
+      tierId: geminiSelectedTier.value
     })
     if (!tokenInfo) return
 

frontend/src/components/account/ReAuthAccountModal.vue

@@ -88,7 +88,35 @@
       <!-- Gemini OAuth Type Selection -->
       <fieldset v-if="isGemini" class="border-0 p-0">
         <legend class="input-label">{{ t('admin.accounts.oauth.gemini.oauthTypeLabel') }}</legend>
-        <div class="mt-2 grid grid-cols-2 gap-3">
+        <div class="mt-2 grid grid-cols-3 gap-3">
+          <button
+            type="button"
+            @click="handleSelectGeminiOAuthType('google_one')"
+            :class="[
+              'flex items-center gap-3 rounded-lg border-2 p-3 text-left transition-all',
+              geminiOAuthType === 'google_one'
+                ? 'border-purple-500 bg-purple-50 dark:bg-purple-900/20'
+                : 'border-gray-200 hover:border-purple-300 dark:border-dark-600 dark:hover:border-purple-700'
+            ]"
+          >
+            <div
+              :class="[
+                'flex h-8 w-8 items-center justify-center rounded-lg',
+                geminiOAuthType === 'google_one'
+                  ? 'bg-purple-500 text-white'
+                  : 'bg-gray-100 text-gray-500 dark:bg-dark-600 dark:text-gray-400'
+              ]"
+            >
+              <svg class="h-4 w-4" fill="none" viewBox="0 0 24 24" stroke="currentColor" stroke-width="1.5">
+                <path stroke-linecap="round" stroke-linejoin="round" d="M15.75 6a3.75 3.75 0 11-7.5 0 3.75 3.75 0 017.5 0zM4.501 20.118a7.5 7.5 0 0114.998 0A17.933 17.933 0 0112 21.75c-2.676 0-5.216-.584-7.499-1.632z" />
+              </svg>
+            </div>
+            <div class="min-w-0">
+              <span class="block text-sm font-medium text-gray-900 dark:text-white">Google One</span>
+              <span class="text-xs text-gray-500 dark:text-gray-400">个人账号</span>
+            </div>
+          </button>
+
           <button
             type="button"
             @click="handleSelectGeminiOAuthType('code_assist')"
@@ -305,7 +333,7 @@ const oauthFlowRef = ref<OAuthFlowExposed | null>(null)
 
 // State
 const addMethod = ref<AddMethod>('oauth')
-const geminiOAuthType = ref<'code_assist' | 'ai_studio'>('code_assist')
+const geminiOAuthType = ref<'code_assist' | 'google_one' | 'ai_studio'>('code_assist')
 const geminiAIStudioOAuthEnabled = ref(false)
 
 // Computed - check platform
@@ -367,7 +395,12 @@ watch(
       }
       if (isGemini.value) {
         const creds = (props.account.credentials || {}) as Record<string, unknown>
-        geminiOAuthType.value = creds.oauth_type === 'ai_studio' ? 'ai_studio' : 'code_assist'
+        geminiOAuthType.value =
+          creds.oauth_type === 'google_one'
+            ? 'google_one'
+            : creds.oauth_type === 'ai_studio'
+              ? 'ai_studio'
+              : 'code_assist'
       }
       if (isGemini.value) {
         geminiOAuth.getCapabilities().then((caps) => {
@@ -395,7 +428,7 @@ const resetState = () => {
   oauthFlowRef.value?.reset()
 }
 
-const handleSelectGeminiOAuthType = (oauthType: 'code_assist' | 'ai_studio') => {
+const handleSelectGeminiOAuthType = (oauthType: 'code_assist' | 'google_one' | 'ai_studio') => {
   if (oauthType === 'ai_studio' && !geminiAIStudioOAuthEnabled.value) {
     appStore.showError(t('admin.accounts.oauth.gemini.aiStudioNotConfigured'))
     return
@@ -413,8 +446,10 @@ const handleGenerateUrl = async () => {
   if (isOpenAI.value) {
     await openaiOAuth.generateAuthUrl(props.account.proxy_id)
   } else if (isGemini.value) {
+    const creds = (props.account.credentials || {}) as Record<string, unknown>
+    const tierId = typeof creds.tier_id === 'string' ? creds.tier_id : undefined
     const projectId = geminiOAuthType.value === 'code_assist' ? oauthFlowRef.value?.projectId : undefined
-    await geminiOAuth.generateAuthUrl(props.account.proxy_id, projectId, geminiOAuthType.value)
+    await geminiOAuth.generateAuthUrl(props.account.proxy_id, projectId, geminiOAuthType.value, tierId)
   } else if (isAntigravity.value) {
     await antigravityOAuth.generateAuthUrl(props.account.proxy_id)
   } else {
@@ -475,7 +510,8 @@ const handleExchangeCode = async () => {
       sessionId,
       state: stateToUse,
       proxyId: props.account.proxy_id,
-      oauthType: geminiOAuthType.value
+      oauthType: geminiOAuthType.value,
+      tierId: typeof (props.account.credentials as any)?.tier_id === 'string' ? ((props.account.credentials as any).tier_id as string) : undefined
     })
     if (!tokenInfo) return