feat: 添加 Antigravity (Cloud AI Companion) OAuth 授权支持

frontend/src/api/admin/antigravity.ts

@@ -0,0 +1,56 @@
+/**
+ * Admin Antigravity API endpoints
+ * Handles Antigravity (Google Cloud AI Companion) OAuth flows for administrators
+ */
+
+import { apiClient } from '../client'
+
+export interface AntigravityAuthUrlResponse {
+  auth_url: string
+  session_id: string
+  state: string
+}
+
+export interface AntigravityAuthUrlRequest {
+  proxy_id?: number
+}
+
+export interface AntigravityExchangeCodeRequest {
+  session_id: string
+  state: string
+  code: string
+  proxy_id?: number
+}
+
+export interface AntigravityTokenInfo {
+  access_token?: string
+  refresh_token?: string
+  token_type?: string
+  expires_at?: number | string
+  expires_in?: number
+  project_id?: string
+  email?: string
+  [key: string]: unknown
+}
+
+export async function generateAuthUrl(
+  payload: AntigravityAuthUrlRequest
+): Promise<AntigravityAuthUrlResponse> {
+  const { data } = await apiClient.post<AntigravityAuthUrlResponse>(
+    '/admin/antigravity/oauth/auth-url',
+    payload
+  )
+  return data
+}
+
+export async function exchangeCode(
+  payload: AntigravityExchangeCodeRequest
+): Promise<AntigravityTokenInfo> {
+  const { data } = await apiClient.post<AntigravityTokenInfo>(
+    '/admin/antigravity/oauth/exchange-code',
+    payload
+  )
+  return data
+}
+
+export default { generateAuthUrl, exchangeCode }

frontend/src/api/admin/index.ts

@@ -14,6 +14,7 @@ import systemAPI from './system'
 import subscriptionsAPI from './subscriptions'
 import usageAPI from './usage'
 import geminiAPI from './gemini'
+import antigravityAPI from './antigravity'
 
 /**
  * Unified admin API object for convenient access
@@ -29,7 +30,8 @@ export const adminAPI = {
   system: systemAPI,
   subscriptions: subscriptionsAPI,
   usage: usageAPI,
-  gemini: geminiAPI
+  gemini: geminiAPI,
+  antigravity: antigravityAPI
 }
 
 export {
@@ -43,7 +45,8 @@ export {
   systemAPI,
   subscriptionsAPI,
   usageAPI,
-  geminiAPI
+  geminiAPI,
+  antigravityAPI
 }
 
 export default adminAPI