fix: 优化登录流程和余额查询逻辑

- 添加 fetchBalanceWithToken 支持登录时直接传入 token 查询余额
- AuthProvider 会话加载改为同步方式避免时序问题
- 添加调试日志便于排查问题

src/config/settings.ts

@@ -8,7 +8,7 @@ import * as vscode from "vscode";
 type Environment = "dev" | "test" | "prod";
 
 /** 当前环境 - 修改这里切换环境 */
-const CURRENT_ENV: Environment = "test";
+const CURRENT_ENV: Environment = "dev";
 
 /** 服务等级类型 */
 export type ServiceTier = "lite" | "syntaxic" | "max" | "auto";