feat(teams): fix checkbox multi-select and improve batch operations UI

- Fix checkbox binding using :model-value instead of :checked
- Change selectedIds from Set to reactive array for proper Vue reactivity
- Move batch refresh/delete buttons to top bar (matching CardKeysPage layout)
- Buttons show selection count like 'Refresh (2)' when items selected
- Swap position of 'Add Team' and 'Random Invite' buttons
- Remove unused isIndeterminate computed property

backend/internal/router/router.go

@@ -26,7 +26,7 @@ func SetupRoutes(db *sql.DB) http.Handler {
 
 	// 初始化处理器
 	authHandler := handler.NewAuthHandler(adminRepo)
-	accountHandler := handler.NewChatGPTAccountHandler(chatgptAccountRepo, chatgptService)
+	accountHandler := handler.NewChatGPTAccountHandler(chatgptAccountRepo, invitationRepo, chatgptService)
 	inviteHandler := handler.NewInviteHandler(chatgptAccountRepo, invitationRepo, cardKeyRepo, chatgptService)
 	cardKeyHandler := handler.NewCardKeyHandler(cardKeyRepo)
 
@@ -47,6 +47,8 @@ func SetupRoutes(db *sql.DB) http.Handler {
 	protectedMux.HandleFunc("/api/accounts/create", accountHandler.Create)
 	protectedMux.HandleFunc("/api/accounts/refresh", accountHandler.Refresh)
 	protectedMux.HandleFunc("/api/accounts/delete", accountHandler.Delete)
+	protectedMux.HandleFunc("/api/accounts/batch/delete", accountHandler.BatchDelete)
+	protectedMux.HandleFunc("/api/accounts/batch/refresh", accountHandler.BatchRefresh)
 
 	// 邀请接口 (管理员) - GET: 列表, POST: 邀请, DELETE: 移除
 	protectedMux.HandleFunc("/api/invite", func(w http.ResponseWriter, r *http.Request) {