fix(gemini): Google One 强制使用内置 OAuth client + 自动获取 project_id + UI 优化 (#212)

* fix(gemini): Google One 强制使用内置 OAuth client + 自动获取 project_id + UI 优化

## 后端改动

### 1. Google One 强制使用内置 Gemini CLI OAuth Client
**问题**：
- Google One 之前允许使用自定义 OAuth client，导致认证流程不稳定
- 与 Code Assist 的行为不一致

**解决方案**：
- 修改 `gemini_oauth_service.go`: Google One 现在与 Code Assist 一样强制使用内置 client (L122-135)
- 更新 `gemini_oauth_client.go`: ExchangeCode 和 RefreshToken 方法支持强制内置 client (L31-44, L77-86)
- 简化 `geminicli/oauth.go`: Google One scope 选择逻辑 (L187-190)
- 标记 `geminicli/constants.go`: DefaultGoogleOneScopes 为 DEPRECATED (L30-33)
- 更新测试用例以反映新行为

**OAuth 类型对比**：
| OAuth类型 | Client来源 | Scopes | Redirect URI |
|-----------|-----------|--------|-----------------|
| code_assist | 内置 Gemini CLI | DefaultCodeAssistScopes | https://codeassist.google.com/authcode |
| google_one | 内置 Gemini CLI (新) | DefaultCodeAssistScopes | https://codeassist.google.com/authcode |
| ai_studio | 必须自定义 | DefaultAIStudioScopes | http://localhost:1455/auth/callback |

### 2. Google One 自动获取 project_id
**问题**：
- Google One 个人账号测试模型时返回 403/404 错误
- 原因：cloudaicompanion API 需要 project_id，但个人账号无需手动创建 GCP 项目

**解决方案**：
- 修改 `gemini_oauth_service.go`: OAuth 流程中自动调用 fetchProjectID
- Google 通过 LoadCodeAssist API 自动分配 project_id
- 与 Gemini CLI 行为保持一致
- 后端根据 project_id 自动选择正确的 API 端点

**影响**：
- Google One 账号现在可以正常使用（需要重新授权）
- Code Assist 和 AI Studio 账号不受影响

### 3. 修复 Gemini 测试账号无内容输出问题
**问题**：
- 测试 Gemini 账号时只显示"测试成功"，没有显示 AI 响应内容
- 原因：processGeminiStream 在检查到 finishReason 时立即返回，跳过了内容提取

**解决方案**：
- 修改 `account_test_service.go`: 调整逻辑顺序，先提取内容再检查是否完成
- 确保最后一个 chunk 的内容也能被正确显示

**影响**：
- 所有 Gemini 账号类型（API Key、OAuth）的测试现在都会显示完整响应内容
- 用户可以看到流式输出效果

## 前端改动

### 1. 修复图标宽度压缩问题
**问题**：
- 账户类型选择按钮中的图标在某些情况下会被压缩变形

**解决方案**：
- 修改 `CreateAccountModal.vue`: 为所有平台图标容器添加 `shrink-0` 类
- 确保 Anthropic、OpenAI、Gemini、Antigravity 图标保持固定 8×8 尺寸 (32px × 32px)

### 2. 优化重新授权界面
**问题**：
- 重新授权时显示三个可点击的授权类型选择按钮，可能导致用户误切换到不兼容的授权方式

**解决方案**：
- 修改 `ReAuthAccountModal.vue` (admin 和普通用户版本):
  - 将可点击的授权类型选择按钮改为只读信息展示框
  - 根据账号的 `credentials.oauth_type` 动态显示对应图标和文本
  - 删除 `geminiAIStudioOAuthEnabled` 状态和 `handleSelectGeminiOAuthType` 方法
  - 防止用户误操作

## 测试验证
- ✅ 所有后端单元测试通过
- ✅ OAuth client 选择逻辑正确
- ✅ Google One 和 Code Assist 行为一致
- ✅ 测试账号显示完整响应内容
- ✅ UI 图标显示正常
- ✅ 重新授权界面只读展示正确

* fix(lint): 修复 golangci-lint 错误信息格式问题

- 将错误信息改为小写开头以符合 Go 代码规范
- 修复 ST1005: error strings should not be capitalized

frontend/src/components/account/CreateAccountModal.vue

@@ -166,7 +166,7 @@
           >
             <div
               :class="[
-                'flex h-8 w-8 items-center justify-center rounded-lg',
+                'flex h-8 w-8 shrink-0 items-center justify-center rounded-lg',
                 accountCategory === 'oauth-based'
                   ? 'bg-orange-500 text-white'
                   : 'bg-gray-100 text-gray-500 dark:bg-dark-600 dark:text-gray-400'
@@ -196,7 +196,7 @@
           >
             <div
               :class="[
-                'flex h-8 w-8 items-center justify-center rounded-lg',
+                'flex h-8 w-8 shrink-0 items-center justify-center rounded-lg',
                 accountCategory === 'apikey'
                   ? 'bg-purple-500 text-white'
                   : 'bg-gray-100 text-gray-500 dark:bg-dark-600 dark:text-gray-400'
@@ -232,7 +232,7 @@
           >
             <div
               :class="[
-                'flex h-8 w-8 items-center justify-center rounded-lg',
+                'flex h-8 w-8 shrink-0 items-center justify-center rounded-lg',
                 accountCategory === 'oauth-based'
                   ? 'bg-green-500 text-white'
                   : 'bg-gray-100 text-gray-500 dark:bg-dark-600 dark:text-gray-400'
@@ -258,7 +258,7 @@
           >
             <div
               :class="[
-                'flex h-8 w-8 items-center justify-center rounded-lg',
+                'flex h-8 w-8 shrink-0 items-center justify-center rounded-lg',
                 accountCategory === 'apikey'
                   ? 'bg-purple-500 text-white'
                   : 'bg-gray-100 text-gray-500 dark:bg-dark-600 dark:text-gray-400'
@@ -302,7 +302,7 @@
           >
             <div
               :class="[
-                'flex h-8 w-8 items-center justify-center rounded-lg',
+                'flex h-8 w-8 shrink-0 items-center justify-center rounded-lg',
                 accountCategory === 'oauth-based'
                   ? 'bg-blue-500 text-white'
                   : 'bg-gray-100 text-gray-500 dark:bg-dark-600 dark:text-gray-400'
@@ -332,7 +332,7 @@
           >
             <div
               :class="[
-                'flex h-8 w-8 items-center justify-center rounded-lg',
+                'flex h-8 w-8 shrink-0 items-center justify-center rounded-lg',
                 accountCategory === 'apikey'
                   ? 'bg-purple-500 text-white'
                   : 'bg-gray-100 text-gray-500 dark:bg-dark-600 dark:text-gray-400'
@@ -397,7 +397,7 @@
             >
               <div
                 :class="[
-                  'flex h-8 w-8 items-center justify-center rounded-lg',
+                  'flex h-8 w-8 shrink-0 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'
@@ -440,7 +440,7 @@
             >
               <div
                 :class="[
-                  'flex h-8 w-8 items-center justify-center rounded-lg',
+                  'flex h-8 w-8 shrink-0 items-center justify-center rounded-lg',
                   geminiOAuthType === 'code_assist'
                     ? 'bg-blue-500 text-white'
                     : 'bg-gray-100 text-gray-500 dark:bg-dark-600 dark:text-gray-400'
@@ -518,7 +518,7 @@
             >
               <div
                 :class="[
-                  'flex h-8 w-8 items-center justify-center rounded-lg',
+                  'flex h-8 w-8 shrink-0 items-center justify-center rounded-lg',
                   geminiOAuthType === 'ai_studio'
                     ? 'bg-amber-500 text-white'
                     : 'bg-gray-100 text-gray-500 dark:bg-dark-600 dark:text-gray-400'
@@ -621,7 +621,7 @@
           <div
             class="flex items-center gap-3 rounded-lg border-2 border-purple-500 bg-purple-50 p-3 dark:bg-purple-900/20"
           >
-            <div class="flex h-8 w-8 items-center justify-center rounded-lg bg-purple-500 text-white">
+            <div class="flex h-8 w-8 shrink-0 items-center justify-center rounded-lg bg-purple-500 text-white">
               <Icon name="key" size="sm" />
             </div>
             <div>

frontend/src/components/account/ReAuthAccountModal.vue

@@ -73,113 +73,48 @@
         </div>
       </fieldset>
 
-      <!-- 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-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')"
-            :class="[
-              'flex items-center gap-3 rounded-lg border-2 p-3 text-left transition-all',
-              geminiOAuthType === 'code_assist'
-                ? 'border-blue-500 bg-blue-50 dark:bg-blue-900/20'
-                : 'border-gray-200 hover:border-blue-300 dark:border-dark-600 dark:hover:border-blue-700'
-            ]"
-          >
-            <div
-              :class="[
-                'flex h-8 w-8 items-center justify-center rounded-lg',
-                geminiOAuthType === 'code_assist'
-                  ? 'bg-blue-500 text-white'
-                  : 'bg-gray-100 text-gray-500 dark:bg-dark-600 dark:text-gray-400'
-              ]"
-            >
-              <Icon name="cloud" size="sm" />
-            </div>
-            <div class="min-w-0">
-              <span class="block text-sm font-medium text-gray-900 dark:text-white">
-                {{ t('admin.accounts.gemini.oauthType.builtInTitle') }}
-              </span>
-              <span class="text-xs text-gray-500 dark:text-gray-400">
-                {{ t('admin.accounts.gemini.oauthType.builtInDesc') }}
-              </span>
-            </div>
-          </button>
-
-          <button
-            type="button"
-            :disabled="!geminiAIStudioOAuthEnabled"
-            @click="handleSelectGeminiOAuthType('ai_studio')"
-            :class="[
-              'flex items-center gap-3 rounded-lg border-2 p-3 text-left transition-all',
-              !geminiAIStudioOAuthEnabled ? 'cursor-not-allowed opacity-60' : '',
-              geminiOAuthType === 'ai_studio'
-                ? '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 === 'ai_studio'
-                  ? 'bg-purple-500 text-white'
-                  : 'bg-gray-100 text-gray-500 dark:bg-dark-600 dark:text-gray-400'
-              ]"
-            >
-              <Icon name="sparkles" size="sm" />
-            </div>
-            <div class="min-w-0">
-              <span class="block text-sm font-medium text-gray-900 dark:text-white">
-                {{ t('admin.accounts.gemini.oauthType.customTitle') }}
-              </span>
-              <span class="text-xs text-gray-500 dark:text-gray-400">
-                {{ t('admin.accounts.gemini.oauthType.customDesc') }}
-              </span>
-              <div v-if="!geminiAIStudioOAuthEnabled" class="group relative mt-1 inline-block">
-                <span
-                  class="rounded bg-amber-100 px-2 py-0.5 text-xs text-amber-700 dark:bg-amber-900/30 dark:text-amber-300"
-                >
-                  {{ t('admin.accounts.oauth.gemini.aiStudioNotConfiguredShort') }}
-                </span>
-                <div
-                  class="pointer-events-none absolute left-0 top-full z-10 mt-2 w-[28rem] rounded-md border border-amber-200 bg-amber-50 px-3 py-2 text-xs text-amber-800 opacity-0 shadow-sm transition-opacity group-hover:opacity-100 dark:border-amber-700 dark:bg-amber-900/40 dark:text-amber-200"
-                >
-                  {{ t('admin.accounts.oauth.gemini.aiStudioNotConfiguredTip') }}
-                </div>
-              </div>
-            </div>
-          </button>
+      <!-- Gemini OAuth Type Display (read-only) -->
+      <div v-if="isGemini" class="rounded-lg border border-gray-200 bg-gray-50 p-4 dark:border-dark-600 dark:bg-dark-700">
+        <div class="mb-2 text-sm font-medium text-gray-700 dark:text-gray-300">
+          {{ t('admin.accounts.oauth.gemini.oauthTypeLabel') }}
         </div>
-      </fieldset>
+        <div class="flex items-center gap-3">
+          <div
+            :class="[
+              'flex h-8 w-8 shrink-0 items-center justify-center rounded-lg',
+              geminiOAuthType === 'google_one'
+                ? 'bg-purple-500 text-white'
+                : geminiOAuthType === 'code_assist'
+                  ? 'bg-blue-500 text-white'
+                  : 'bg-amber-500 text-white'
+            ]"
+          >
+            <Icon v-if="geminiOAuthType === 'google_one'" name="user" size="sm" />
+            <Icon v-else-if="geminiOAuthType === 'code_assist'" name="cloud" size="sm" />
+            <Icon v-else name="sparkles" size="sm" />
+          </div>
+          <div>
+            <span class="block text-sm font-medium text-gray-900 dark:text-white">
+              {{
+                geminiOAuthType === 'google_one'
+                  ? 'Google One'
+                  : geminiOAuthType === 'code_assist'
+                    ? t('admin.accounts.gemini.oauthType.builtInTitle')
+                    : t('admin.accounts.gemini.oauthType.customTitle')
+              }}
+            </span>
+            <span class="text-xs text-gray-500 dark:text-gray-400">
+              {{
+                geminiOAuthType === 'google_one'
+                  ? '个人账号'
+                  : geminiOAuthType === 'code_assist'
+                    ? t('admin.accounts.gemini.oauthType.builtInDesc')
+                    : t('admin.accounts.gemini.oauthType.customDesc')
+              }}
+            </span>
+          </div>
+        </div>
+      </div>
 
       <OAuthAuthorizationFlow
         ref="oauthFlowRef"
@@ -299,7 +234,6 @@ const oauthFlowRef = ref<OAuthFlowExposed | null>(null)
 // State
 const addMethod = ref<AddMethod>('oauth')
 const geminiOAuthType = ref<'code_assist' | 'google_one' | 'ai_studio'>('code_assist')
-const geminiAIStudioOAuthEnabled = ref(false)
 
 // Computed - check platform
 const isOpenAI = computed(() => props.account?.platform === 'openai')
@@ -367,14 +301,6 @@ watch(
               ? 'ai_studio'
               : 'code_assist'
       }
-      if (isGemini.value) {
-        geminiOAuth.getCapabilities().then((caps) => {
-          geminiAIStudioOAuthEnabled.value = !!caps?.ai_studio_oauth_enabled
-          if (!geminiAIStudioOAuthEnabled.value && geminiOAuthType.value === 'ai_studio') {
-            geminiOAuthType.value = 'code_assist'
-          }
-        })
-      }
     } else {
       resetState()
     }
@@ -385,7 +311,6 @@ watch(
 const resetState = () => {
   addMethod.value = 'oauth'
   geminiOAuthType.value = 'code_assist'
-  geminiAIStudioOAuthEnabled.value = false
   claudeOAuth.resetState()
   openaiOAuth.resetState()
   geminiOAuth.resetState()
@@ -393,14 +318,6 @@ const resetState = () => {
   oauthFlowRef.value?.reset()
 }
 
-const handleSelectGeminiOAuthType = (oauthType: 'code_assist' | 'google_one' | 'ai_studio') => {
-  if (oauthType === 'ai_studio' && !geminiAIStudioOAuthEnabled.value) {
-    appStore.showError(t('admin.accounts.oauth.gemini.aiStudioNotConfigured'))
-    return
-  }
-  geminiOAuthType.value = oauthType
-}
-
 const handleClose = () => {
   emit('close')
 }

frontend/src/components/admin/account/ReAuthAccountModal.vue

@@ -73,111 +73,48 @@
         </div>
       </fieldset>
 
-      <!-- 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-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'
-              ]"
-            >
-              <Icon name="user" size="sm" />
-            </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')"
-            :class="[
-              'flex items-center gap-3 rounded-lg border-2 p-3 text-left transition-all',
-              geminiOAuthType === 'code_assist'
-                ? 'border-blue-500 bg-blue-50 dark:bg-blue-900/20'
-                : 'border-gray-200 hover:border-blue-300 dark:border-dark-600 dark:hover:border-blue-700'
-            ]"
-          >
-            <div
-              :class="[
-                'flex h-8 w-8 items-center justify-center rounded-lg',
-                geminiOAuthType === 'code_assist'
-                  ? 'bg-blue-500 text-white'
-                  : 'bg-gray-100 text-gray-500 dark:bg-dark-600 dark:text-gray-400'
-              ]"
-            >
-              <Icon name="cloud" size="sm" />
-            </div>
-            <div class="min-w-0">
-              <span class="block text-sm font-medium text-gray-900 dark:text-white">
-                {{ t('admin.accounts.gemini.oauthType.builtInTitle') }}
-              </span>
-              <span class="text-xs text-gray-500 dark:text-gray-400">
-                {{ t('admin.accounts.gemini.oauthType.builtInDesc') }}
-              </span>
-            </div>
-          </button>
-
-          <button
-            type="button"
-            :disabled="!geminiAIStudioOAuthEnabled"
-            @click="handleSelectGeminiOAuthType('ai_studio')"
-            :class="[
-              'flex items-center gap-3 rounded-lg border-2 p-3 text-left transition-all',
-              !geminiAIStudioOAuthEnabled ? 'cursor-not-allowed opacity-60' : '',
-              geminiOAuthType === 'ai_studio'
-                ? '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 === 'ai_studio'
-                  ? 'bg-purple-500 text-white'
-                  : 'bg-gray-100 text-gray-500 dark:bg-dark-600 dark:text-gray-400'
-              ]"
-            >
-              <Icon name="sparkles" size="sm" />
-            </div>
-            <div class="min-w-0">
-              <span class="block text-sm font-medium text-gray-900 dark:text-white">
-                {{ t('admin.accounts.gemini.oauthType.customTitle') }}
-              </span>
-              <span class="text-xs text-gray-500 dark:text-gray-400">
-                {{ t('admin.accounts.gemini.oauthType.customDesc') }}
-              </span>
-              <div v-if="!geminiAIStudioOAuthEnabled" class="group relative mt-1 inline-block">
-                <span
-                  class="rounded bg-amber-100 px-2 py-0.5 text-xs text-amber-700 dark:bg-amber-900/30 dark:text-amber-300"
-                >
-                  {{ t('admin.accounts.oauth.gemini.aiStudioNotConfiguredShort') }}
-                </span>
-                <div
-                  class="pointer-events-none absolute left-0 top-full z-10 mt-2 w-[28rem] rounded-md border border-amber-200 bg-amber-50 px-3 py-2 text-xs text-amber-800 opacity-0 shadow-sm transition-opacity group-hover:opacity-100 dark:border-amber-700 dark:bg-amber-900/40 dark:text-amber-200"
-                >
-                  {{ t('admin.accounts.oauth.gemini.aiStudioNotConfiguredTip') }}
-                </div>
-              </div>
-            </div>
-          </button>
+      <!-- Gemini OAuth Type Display (read-only) -->
+      <div v-if="isGemini" class="rounded-lg border border-gray-200 bg-gray-50 p-4 dark:border-dark-600 dark:bg-dark-700">
+        <div class="mb-2 text-sm font-medium text-gray-700 dark:text-gray-300">
+          {{ t('admin.accounts.oauth.gemini.oauthTypeLabel') }}
         </div>
-      </fieldset>
+        <div class="flex items-center gap-3">
+          <div
+            :class="[
+              'flex h-8 w-8 shrink-0 items-center justify-center rounded-lg',
+              geminiOAuthType === 'google_one'
+                ? 'bg-purple-500 text-white'
+                : geminiOAuthType === 'code_assist'
+                  ? 'bg-blue-500 text-white'
+                  : 'bg-amber-500 text-white'
+            ]"
+          >
+            <Icon v-if="geminiOAuthType === 'google_one'" name="user" size="sm" />
+            <Icon v-else-if="geminiOAuthType === 'code_assist'" name="cloud" size="sm" />
+            <Icon v-else name="sparkles" size="sm" />
+          </div>
+          <div>
+            <span class="block text-sm font-medium text-gray-900 dark:text-white">
+              {{
+                geminiOAuthType === 'google_one'
+                  ? 'Google One'
+                  : geminiOAuthType === 'code_assist'
+                    ? t('admin.accounts.gemini.oauthType.builtInTitle')
+                    : t('admin.accounts.gemini.oauthType.customTitle')
+              }}
+            </span>
+            <span class="text-xs text-gray-500 dark:text-gray-400">
+              {{
+                geminiOAuthType === 'google_one'
+                  ? '个人账号'
+                  : geminiOAuthType === 'code_assist'
+                    ? t('admin.accounts.gemini.oauthType.builtInDesc')
+                    : t('admin.accounts.gemini.oauthType.customDesc')
+              }}
+            </span>
+          </div>
+        </div>
+      </div>
 
       <OAuthAuthorizationFlow
         ref="oauthFlowRef"
@@ -297,7 +234,6 @@ const oauthFlowRef = ref<OAuthFlowExposed | null>(null)
 // State
 const addMethod = ref<AddMethod>('oauth')
 const geminiOAuthType = ref<'code_assist' | 'google_one' | 'ai_studio'>('code_assist')
-const geminiAIStudioOAuthEnabled = ref(false)
 
 // Computed - check platform
 const isOpenAI = computed(() => props.account?.platform === 'openai')
@@ -365,14 +301,6 @@ watch(
               ? 'ai_studio'
               : 'code_assist'
       }
-      if (isGemini.value) {
-        geminiOAuth.getCapabilities().then((caps) => {
-          geminiAIStudioOAuthEnabled.value = !!caps?.ai_studio_oauth_enabled
-          if (!geminiAIStudioOAuthEnabled.value && geminiOAuthType.value === 'ai_studio') {
-            geminiOAuthType.value = 'code_assist'
-          }
-        })
-      }
     } else {
       resetState()
     }
@@ -383,7 +311,6 @@ watch(
 const resetState = () => {
   addMethod.value = 'oauth'
   geminiOAuthType.value = 'code_assist'
-  geminiAIStudioOAuthEnabled.value = false
   claudeOAuth.resetState()
   openaiOAuth.resetState()
   geminiOAuth.resetState()
@@ -391,14 +318,6 @@ const resetState = () => {
   oauthFlowRef.value?.reset()
 }
 
-const handleSelectGeminiOAuthType = (oauthType: 'code_assist' | 'google_one' | 'ai_studio') => {
-  if (oauthType === 'ai_studio' && !geminiAIStudioOAuthEnabled.value) {
-    appStore.showError(t('admin.accounts.oauth.gemini.aiStudioNotConfigured'))
-    return
-  }
-  geminiOAuthType.value = oauthType
-}
-
 const handleClose = () => {
   emit('close')
 }