feat(antigravity): 支持 Refresh Token 批量导入创建 OAuth 账号

后端新增 ValidateRefreshToken service 方法和 POST /oauth/refresh-token 端点，
前端新增 API/Composable/UI 集成，OAuthAuthorizationFlow i18n 动态化，
支持在 Antigravity 创建账号时批量粘贴 Refresh Token 自动验证并创建账号。

backend/internal/handler/admin/antigravity_oauth_handler.go

@@ -65,3 +65,27 @@ func (h *AntigravityOAuthHandler) ExchangeCode(c *gin.Context) {
 
 	response.Success(c, tokenInfo)
 }
+
+// AntigravityRefreshTokenRequest represents the request for validating Antigravity refresh token
+type AntigravityRefreshTokenRequest struct {
+	RefreshToken string `json:"refresh_token" binding:"required"`
+	ProxyID      *int64 `json:"proxy_id"`
+}
+
+// RefreshToken validates an Antigravity refresh token and returns full token info
+// POST /api/v1/admin/antigravity/oauth/refresh-token
+func (h *AntigravityOAuthHandler) RefreshToken(c *gin.Context) {
+	var req AntigravityRefreshTokenRequest
+	if err := c.ShouldBindJSON(&req); err != nil {
+		response.BadRequest(c, "请求无效: "+err.Error())
+		return
+	}
+
+	tokenInfo, err := h.antigravityOAuthService.ValidateRefreshToken(c.Request.Context(), req.RefreshToken, req.ProxyID)
+	if err != nil {
+		response.ErrorFrom(c, err)
+		return
+	}
+
+	response.Success(c, tokenInfo)
+}

backend/internal/server/routes/admin.go

@@ -281,6 +281,7 @@ func registerAntigravityOAuthRoutes(admin *gin.RouterGroup, h *handler.Handlers)
 	{
 		antigravity.POST("/oauth/auth-url", h.Admin.AntigravityOAuth.GenerateAuthURL)
 		antigravity.POST("/oauth/exchange-code", h.Admin.AntigravityOAuth.ExchangeCode)
+		antigravity.POST("/oauth/refresh-token", h.Admin.AntigravityOAuth.RefreshToken)
 	}
 }
 

backend/internal/service/antigravity_oauth_service.go

@@ -192,6 +192,43 @@ func (s *AntigravityOAuthService) RefreshToken(ctx context.Context, refreshToken
 	return nil, fmt.Errorf("token 刷新失败 (重试后): %w", lastErr)
 }
 
+// ValidateRefreshToken 用 refresh token 验证并获取完整的 token 信息（含 email 和 project_id）
+func (s *AntigravityOAuthService) ValidateRefreshToken(ctx context.Context, refreshToken string, proxyID *int64) (*AntigravityTokenInfo, error) {
+	var proxyURL string
+	if proxyID != nil {
+		proxy, err := s.proxyRepo.GetByID(ctx, *proxyID)
+		if err == nil && proxy != nil {
+			proxyURL = proxy.URL()
+		}
+	}
+
+	// 刷新 token
+	tokenInfo, err := s.RefreshToken(ctx, refreshToken, proxyURL)
+	if err != nil {
+		return nil, err
+	}
+
+	// 获取用户信息（email）
+	client := antigravity.NewClient(proxyURL)
+	userInfo, err := client.GetUserInfo(ctx, tokenInfo.AccessToken)
+	if err != nil {
+		fmt.Printf("[AntigravityOAuth] 警告: 获取用户信息失败: %v\n", err)
+	} else {
+		tokenInfo.Email = userInfo.Email
+	}
+
+	// 获取 project_id（容错，失败不阻塞）
+	projectID, loadErr := s.loadProjectIDWithRetry(ctx, tokenInfo.AccessToken, proxyURL, 3)
+	if loadErr != nil {
+		fmt.Printf("[AntigravityOAuth] 警告: 获取 project_id 失败（重试后）: %v\n", loadErr)
+		tokenInfo.ProjectIDMissing = true
+	} else {
+		tokenInfo.ProjectID = projectID
+	}
+
+	return tokenInfo, nil
+}
+
 func isNonRetryableAntigravityOAuthError(err error) bool {
 	msg := err.Error()
 	nonRetryable := []string{

frontend/src/api/admin/antigravity.ts

@@ -53,4 +53,18 @@ export async function exchangeCode(
   return data
 }
 
-export default { generateAuthUrl, exchangeCode }
+export async function refreshAntigravityToken(
+  refreshToken: string,
+  proxyId?: number | null
+): Promise<AntigravityTokenInfo> {
+  const payload: Record<string, any> = { refresh_token: refreshToken }
+  if (proxyId) payload.proxy_id = proxyId
+  
+  const { data } = await apiClient.post<AntigravityTokenInfo>(
+    '/admin/antigravity/oauth/refresh-token',
+    payload
+  )
+  return data
+}
+
+export default { generateAuthUrl, exchangeCode, refreshAntigravityToken }

frontend/src/components/account/CreateAccountModal.vue

@@ -1647,12 +1647,12 @@
         :show-proxy-warning="form.platform !== 'openai' && !!form.proxy_id"
         :allow-multiple="form.platform === 'anthropic'"
         :show-cookie-option="form.platform === 'anthropic'"
-        :show-refresh-token-option="form.platform === 'openai'"
+        :show-refresh-token-option="form.platform === 'openai' || form.platform === 'antigravity'"
         :platform="form.platform"
         :show-project-id="geminiOAuthType === 'code_assist'"
         @generate-url="handleGenerateUrl"
         @cookie-auth="handleCookieAuth"
-        @validate-refresh-token="handleOpenAIValidateRT"
+        @validate-refresh-token="handleValidateRefreshToken"
       />
 
     </div>
@@ -2802,6 +2802,14 @@ const handleGenerateUrl = async () => {
   }
 }
 
+const handleValidateRefreshToken = (rt: string) => {
+  if (form.platform === 'openai') {
+    handleOpenAIValidateRT(rt)
+  } else if (form.platform === 'antigravity') {
+    handleAntigravityValidateRT(rt)
+  }
+}
+
 const formatDateTimeLocal = formatDateTimeLocalInput
 const parseDateTimeLocal = parseDateTimeLocalInput
 
@@ -2950,6 +2958,95 @@ const handleOpenAIValidateRT = async (refreshTokenInput: string) => {
   }
 }
 
+// Antigravity 手动 RT 批量验证和创建
+const handleAntigravityValidateRT = async (refreshTokenInput: string) => {
+  if (!refreshTokenInput.trim()) return
+
+  // Parse multiple refresh tokens (one per line)
+  const refreshTokens = refreshTokenInput
+    .split('\n')
+    .map((rt) => rt.trim())
+    .filter((rt) => rt)
+
+  if (refreshTokens.length === 0) {
+    antigravityOAuth.error.value = t('admin.accounts.oauth.antigravity.pleaseEnterRefreshToken')
+    return
+  }
+
+  antigravityOAuth.loading.value = true
+  antigravityOAuth.error.value = ''
+
+  let successCount = 0
+  let failedCount = 0
+  const errors: string[] = []
+
+  try {
+    for (let i = 0; i < refreshTokens.length; i++) {
+      try {
+        const tokenInfo = await antigravityOAuth.validateRefreshToken(
+          refreshTokens[i],
+          form.proxy_id
+        )
+        if (!tokenInfo) {
+          failedCount++
+          errors.push(`#${i + 1}: ${antigravityOAuth.error.value || 'Validation failed'}`)
+          antigravityOAuth.error.value = ''
+          continue
+        }
+
+        const credentials = antigravityOAuth.buildCredentials(tokenInfo)
+        
+        // Generate account name with index for batch
+        const accountName = refreshTokens.length > 1 ? `${form.name} #${i + 1}` : form.name
+
+        // Note: Antigravity doesn't have buildExtraInfo, so we pass empty extra or rely on credentials
+        await adminAPI.accounts.create({
+          name: accountName,
+          notes: form.notes,
+          platform: 'antigravity',
+          type: 'oauth',
+          credentials,
+          extra: {},
+          proxy_id: form.proxy_id,
+          concurrency: form.concurrency,
+          priority: form.priority,
+          rate_multiplier: form.rate_multiplier,
+          group_ids: form.group_ids,
+          expires_at: form.expires_at,
+          auto_pause_on_expired: autoPauseOnExpired.value
+        })
+        successCount++
+      } catch (error: any) {
+        failedCount++
+        const errMsg = error.response?.data?.detail || error.message || 'Unknown error'
+        errors.push(`#${i + 1}: ${errMsg}`)
+      }
+    }
+
+    // Show results
+    if (successCount > 0 && failedCount === 0) {
+      appStore.showSuccess(
+        refreshTokens.length > 1
+          ? t('admin.accounts.oauth.batchSuccess', { count: successCount })
+          : t('admin.accounts.accountCreated')
+      )
+      emit('created')
+      handleClose()
+    } else if (successCount > 0 && failedCount > 0) {
+      appStore.showWarning(
+        t('admin.accounts.oauth.batchPartialSuccess', { success: successCount, failed: failedCount })
+      )
+      antigravityOAuth.error.value = errors.join('\n')
+      emit('created')
+    } else {
+      antigravityOAuth.error.value = errors.join('\n')
+      appStore.showError(t('admin.accounts.oauth.batchFailed'))
+    }
+  } finally {
+    antigravityOAuth.loading.value = false
+  }
+}
+
 // Gemini OAuth 授权码兑换
 const handleGeminiExchange = async (authCode: string) => {
   if (!authCode.trim() || !geminiOAuth.sessionId.value) return

frontend/src/components/account/OAuthAuthorizationFlow.vue

@@ -45,19 +45,19 @@
                 class="text-blue-600 focus:ring-blue-500"
               />
               <span class="text-sm text-blue-900 dark:text-blue-200">{{
-                t('admin.accounts.oauth.openai.refreshTokenAuth')
+                t(getOAuthKey('refreshTokenAuth'))
               }}</span>
             </label>
           </div>
         </div>
 
-        <!-- Refresh Token Input (OpenAI only) -->
+        <!-- Refresh Token Input (OpenAI / Antigravity) -->
         <div v-if="inputMethod === 'refresh_token'" class="space-y-4">
           <div
             class="rounded-lg border border-blue-300 bg-white/80 p-4 dark:border-blue-600 dark:bg-gray-800/80"
           >
             <p class="mb-3 text-sm text-blue-700 dark:text-blue-300">
-              {{ t('admin.accounts.oauth.openai.refreshTokenDesc') }}
+              {{ t(getOAuthKey('refreshTokenDesc')) }}
             </p>
 
             <!-- Refresh Token Input -->
@@ -78,7 +78,7 @@
                 v-model="refreshTokenInput"
                 rows="3"
                 class="input w-full resize-y font-mono text-sm"
-                :placeholder="t('admin.accounts.oauth.openai.refreshTokenPlaceholder')"
+                :placeholder="t(getOAuthKey('refreshTokenPlaceholder'))"
               ></textarea>
               <p
                 v-if="parsedRefreshTokenCount > 1"
@@ -128,8 +128,8 @@
               <Icon v-else name="sparkles" size="sm" class="mr-2" />
               {{
                 loading
-                  ? t('admin.accounts.oauth.openai.validating')
+                  ? t(getOAuthKey('validating'))
-                  : t('admin.accounts.oauth.openai.validateAndCreate')
+                  : t(getOAuthKey('validateAndCreate'))
               }}
             </button>
           </div>

frontend/src/composables/useAntigravityOAuth.ts

@@ -83,6 +83,35 @@ export function useAntigravityOAuth() {
     }
   }
 
+  const validateRefreshToken = async (
+    refreshToken: string,
+    proxyId?: number | null
+  ): Promise<AntigravityTokenInfo | null> => {
+    if (!refreshToken.trim()) {
+      error.value = t('admin.accounts.oauth.antigravity.pleaseEnterRefreshToken')
+      return null
+    }
+
+    loading.value = true
+    error.value = ''
+
+    try {
+      const tokenInfo = await adminAPI.antigravity.refreshAntigravityToken(
+        refreshToken.trim(),
+        proxyId
+      )
+      return tokenInfo as AntigravityTokenInfo
+    } catch (err: any) {
+      error.value =
+        err.response?.data?.detail || t('admin.accounts.oauth.antigravity.failedToValidateRT')
+      // Don't show global error toast for batch validation to avoid spamming
+      // appStore.showError(error.value)
+      return null
+    } finally {
+      loading.value = false
+    }
+  }
+
   const buildCredentials = (tokenInfo: AntigravityTokenInfo): Record<string, unknown> => {
     let expiresAt: string | undefined
     if (typeof tokenInfo.expires_at === 'number' && Number.isFinite(tokenInfo.expires_at)) {
@@ -110,6 +139,7 @@ export function useAntigravityOAuth() {
     resetState,
     generateAuthUrl,
     exchangeAuthCode,
+    validateRefreshToken,
     buildCredentials
   }
 }

frontend/src/i18n/locales/en.ts

@@ -1774,13 +1774,20 @@ export default {
           authCode: 'Authorization URL or Code',
           authCodePlaceholder:
             'Option 1: Copy the complete URL\n(http://localhost:xxx/auth/callback?code=...)\nOption 2: Copy only the code parameter value',
-          authCodeHint: 'You can copy the entire URL or just the code parameter value, the system will auto-detect',
+                    authCodeHint: 'You can copy the entire URL or just the code parameter value, the system will auto-detect',
-          failedToGenerateUrl: 'Failed to generate Antigravity auth URL',
+                    failedToGenerateUrl: 'Failed to generate Antigravity auth URL',
-          missingExchangeParams: 'Missing code, session ID, or state',
+                    missingExchangeParams: 'Missing code, session ID, or state',
-          failedToExchangeCode: 'Failed to exchange Antigravity auth code'
+                    failedToExchangeCode: 'Failed to exchange Antigravity auth code',
-        }
+                    // Refresh Token auth
-	      },
+                    refreshTokenAuth: 'Manual RT',
-      // Gemini specific (platform-wide)
+                    refreshTokenDesc: 'Enter your existing Antigravity Refresh Token. Supports batch input (one per line). The system will automatically validate and create accounts.',
+                    refreshTokenPlaceholder: 'Paste your Antigravity Refresh Token...\nSupports multiple tokens, one per line',
+                    validating: 'Validating...',
+                    validateAndCreate: 'Validate & Create',
+                    pleaseEnterRefreshToken: 'Please enter Refresh Token',
+                    failedToValidateRT: 'Failed to validate Refresh Token'
+                  }
+                },      // Gemini specific (platform-wide)
       gemini: {
         helpButton: 'Help',
         helpDialog: {

frontend/src/i18n/locales/zh.ts

@@ -1913,7 +1913,15 @@ export default {
           authCodeHint: '您可以直接复制整个链接或仅复制 code 参数值，系统会自动识别',
           failedToGenerateUrl: '生成 Antigravity 授权链接失败',
           missingExchangeParams: '缺少 code / session_id / state',
-          failedToExchangeCode: 'Antigravity 授权码兑换失败'
+          failedToExchangeCode: 'Antigravity 授权码兑换失败',
+          // Refresh Token auth
+          refreshTokenAuth: '手动输入 RT',
+          refreshTokenDesc: '输入您已有的 Antigravity Refresh Token，支持批量输入（每行一个），系统将自动验证并创建账号。',
+          refreshTokenPlaceholder: '粘贴您的 Antigravity Refresh Token...\n支持多个，每行一个',
+          validating: '验证中...',
+          validateAndCreate: '验证并创建账号',
+          pleaseEnterRefreshToken: '请输入 Refresh Token',
+          failedToValidateRT: '验证 Refresh Token 失败'
         }
       },
       // Gemini specific (platform-wide)