fix: 修复资源点余额查询一直返回0的问题

- 改为直接调用 StrangeLoop /api/credit/balance 接口
- 携带 JWT token 认证，绕开 Gateway 缺少接口的问题
- 使用 availableCredits 作为余额值
- 固定 5s 超时，避免阻塞发送前检查
- 401/403 单独提示登录过期
- 补充 json.msg 错误消息兜底

src/services/creditsService.ts

@@ -3,7 +3,11 @@
  * 负责缓存余额、主动查询、发送前检测
  */
 
-import { getCreditBalance } from './apiClient';
+import * as vscode from 'vscode';
+import * as https from 'https';
+import * as http from 'http';
+import { URL } from 'url';
+import { getStrangeLoopApiUrl } from '../config/settings';
 import { getCachedUserInfo } from './userService';
 
 /** 低余额阈值 */
@@ -43,22 +47,41 @@ function isCacheValid(): boolean {
 }
 
 /**
- * 主动查询余额
+ * StrangeLoop 余额响应类型
+ */
+interface StrangeLoopBalanceResponse {
+  userId?: number;
+  availableCredits?: number;
+  totalCredits?: number;
+  error?: string;
+  message?: string;
+}
+
+/**
+ * 主动查询余额（直接调用 StrangeLoop 接口）
  */
 export async function fetchBalance(): Promise<number | null> {
-  const userInfo = getCachedUserInfo();
-  if (!userInfo?.userId) {
-    console.warn('[CreditsService] 无法查询余额：未登录');
-    return null;
-  }
-
   try {
-    const response = await getCreditBalance(userInfo.userId);
-    if (response.success && response.balance !== undefined) {
-      updateCachedBalance(response.balance);
-      return response.balance;
+    // 获取 JWT token
+    const session = await vscode.authentication.getSession('iccoder', [], { silent: true });
+    if (!session?.accessToken) {
+      console.warn('[CreditsService] 无法查询余额：未登录');
+      return null;
+    }
+
+    const token = session.accessToken;
+    console.log('[CreditsService] 开始查询余额，token 长度:', token.length);
+
+    // 直接调用 StrangeLoop 的 /api/credit/balance 接口
+    const response = await callStrangeLoopBalance(token);
+
+    if (response.availableCredits !== undefined) {
+      const balance = response.availableCredits;
+      updateCachedBalance(balance);
+      console.log('[CreditsService] 余额查询成功:', balance);
+      return balance;
     } else {
-      console.warn('[CreditsService] 查询余额失败:', response.error);
+      console.warn('[CreditsService] 查询余额失败:', response.error || response.message);
       return null;
     }
   } catch (error) {
@@ -67,6 +90,72 @@ export async function fetchBalance(): Promise<number | null> {
   }
 }
 
+/**
+ * 调用 StrangeLoop 余额接口
+ */
+async function callStrangeLoopBalance(token: string): Promise<StrangeLoopBalanceResponse> {
+  const urlStr = getStrangeLoopApiUrl('/api/credit/balance');
+  const url = new URL(urlStr);
+
+  const isHttps = url.protocol === 'https:';
+  const httpModule = isHttps ? https : http;
+
+  // 余额查询使用固定短超时，避免阻塞发送前检查
+  const BALANCE_TIMEOUT_MS = 5000;
+
+  const requestOptions: http.RequestOptions = {
+    hostname: url.hostname,
+    port: url.port || (isHttps ? 443 : 80),
+    path: url.pathname + url.search,
+    method: 'GET',
+    headers: {
+      'Content-Type': 'application/json',
+      'Authorization': `Bearer ${token}`
+    },
+    timeout: BALANCE_TIMEOUT_MS
+  };
+
+  return new Promise((resolve, reject) => {
+    const req = httpModule.request(requestOptions, (res) => {
+      let data = '';
+
+      res.on('data', (chunk) => {
+        data += chunk;
+      });
+
+      res.on('end', () => {
+        console.log('[CreditsService] 响应状态码:', res.statusCode);
+        console.log('[CreditsService] 响应内容:', data);
+
+        try {
+          const json = JSON.parse(data);
+          if (res.statusCode && res.statusCode >= 200 && res.statusCode < 300) {
+            resolve(json as StrangeLoopBalanceResponse);
+          } else if (res.statusCode === 401 || res.statusCode === 403) {
+            // 登录过期或无权限
+            resolve({ error: '登录已过期，请重新登录' });
+          } else {
+            resolve({ error: json.error || json.message || json.msg || `HTTP ${res.statusCode}` });
+          }
+        } catch (e) {
+          resolve({ error: `解析响应失败: ${data}` });
+        }
+      });
+    });
+
+    req.on('error', (error) => {
+      reject(error);
+    });
+
+    req.on('timeout', () => {
+      req.destroy();
+      reject(new Error('请求超时'));
+    });
+
+    req.end();
+  });
+}
+
 /**
  * 获取当前余额（优先使用缓存，过期则主动查询）
  */