feat(frontend): 增强用户界面和使用教程

主要改进：
- 扩展 UseKeyModal 支持 Antigravity/Gemini 平台教程
- 添加 CCS (Claude Code Settings) 导入说明
- 添加混合渠道风险警告提示
- 优化登录/注册页面样式
- 更新 Antigravity 混合调度选项文案
- 完善中英文国际化文案

frontend/src/api/admin/dashboard.ts

@@ -8,7 +8,7 @@ import type {
   DashboardStats,
   TrendDataPoint,
   ModelStat,
-  APIKeyUsageTrendPoint,
+  ApiKeyUsageTrendPoint,
   UserUsageTrendPoint
 } from '@/types'
 
@@ -93,7 +93,7 @@ export interface ApiKeyTrendParams extends TrendParams {
 }
 
 export interface ApiKeyTrendResponse {
-  trend: APIKeyUsageTrendPoint[]
+  trend: ApiKeyUsageTrendPoint[]
   start_date: string
   end_date: string
   granularity: string

frontend/src/api/admin/index.ts

@@ -15,7 +15,6 @@ import subscriptionsAPI from './subscriptions'
 import usageAPI from './usage'
 import geminiAPI from './gemini'
 import antigravityAPI from './antigravity'
-import opsAPI from './ops'
 import userAttributesAPI from './userAttributes'
 
 /**
@@ -34,7 +33,6 @@ export const adminAPI = {
   usage: usageAPI,
   gemini: geminiAPI,
   antigravity: antigravityAPI,
-  ops: opsAPI,
   userAttributes: userAttributesAPI
 }
 
@@ -51,7 +49,6 @@ export {
   usageAPI,
   geminiAPI,
   antigravityAPI,
-  opsAPI,
   userAttributesAPI
 }