merge: 合并 main 分支到 test，解决 config 和 modelWhitelist 冲突

- config.go: 保留 Sora 配置，合入 SubscriptionCache 配置
- useModelWhitelist.ts: 同时保留 soraModels 和 antigravityModels

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

backend/internal/server/routes/admin.go

@@ -78,6 +78,7 @@ func registerOpsRoutes(admin *gin.RouterGroup, h *handler.Handlers) {
 	{
 		// Realtime ops signals
 		ops.GET("/concurrency", h.Admin.Ops.GetConcurrencyStats)
+		ops.GET("/user-concurrency", h.Admin.Ops.GetUserConcurrencyStats)
 		ops.GET("/account-availability", h.Admin.Ops.GetAccountAvailability)
 		ops.GET("/realtime-traffic", h.Admin.Ops.GetRealtimeTrafficSummary)
 
@@ -222,10 +223,15 @@ func registerAccountRoutes(admin *gin.RouterGroup, h *handler.Handlers) {
 		accounts.POST("/:id/schedulable", h.Admin.Account.SetSchedulable)
 		accounts.GET("/:id/models", h.Admin.Account.GetAvailableModels)
 		accounts.POST("/batch", h.Admin.Account.BatchCreate)
+		accounts.GET("/data", h.Admin.Account.ExportData)
+		accounts.POST("/data", h.Admin.Account.ImportData)
 		accounts.POST("/batch-update-credentials", h.Admin.Account.BatchUpdateCredentials)
 		accounts.POST("/batch-refresh-tier", h.Admin.Account.BatchRefreshTier)
 		accounts.POST("/bulk-update", h.Admin.Account.BulkUpdate)
 
+		// Antigravity 默认模型映射
+		accounts.GET("/antigravity/default-model-mapping", h.Admin.Account.GetAntigravityDefaultModelMapping)
+
 		// Claude OAuth routes
 		accounts.POST("/generate-auth-url", h.Admin.OAuth.GenerateAuthURL)
 		accounts.POST("/generate-setup-token-url", h.Admin.OAuth.GenerateSetupTokenURL)
@@ -281,6 +287,8 @@ func registerProxyRoutes(admin *gin.RouterGroup, h *handler.Handlers) {
 	{
 		proxies.GET("", h.Admin.Proxy.List)
 		proxies.GET("/all", h.Admin.Proxy.GetAll)
+		proxies.GET("/data", h.Admin.Proxy.ExportData)
+		proxies.POST("/data", h.Admin.Proxy.ImportData)
 		proxies.GET("/:id", h.Admin.Proxy.GetByID)
 		proxies.POST("", h.Admin.Proxy.Create)
 		proxies.PUT("/:id", h.Admin.Proxy.Update)