diff --git a/README.md b/README.md
index 435e592..c54f3c6 100644
--- a/README.md
+++ b/README.md
@@ -156,6 +156,8 @@ app/
 | `TOOLS_CODE_EXECUTION_ENABLED` | 可选，是否启用代码执行工具                                     | `false`                                               |
 | `SHOW_SEARCH_LINK`           | 可选，是否在响应中显示搜索结果链接                             | `true`                                                |
 | `SHOW_THINKING_PROCESS`      | 可选，是否显示模型思考过程                                     | `true`                                                |
+| `THINKING_MODELS`            | 可选，支持思考功能的模型列表                                   | `[]`                                                  |
+| `THINKING_BUDGET_MAP`        | 可选，思考功能预算映射 (模型名:预算值)                         | `{}`                                                  |
 | `BASE_URL`                   | 可选，Gemini API 基础 URL，默认无需修改                        | `https://generativelanguage.googleapis.com/v1beta`    |
 | `MAX_FAILURES`               | 可选，允许单个key失败的次数                                    | `3`                                                   |
 | `MAX_RETRIES`                | 可选，API 请求失败时的最大重试次数                             | `3`                                                   |
diff --git a/app/service/stats_service.py b/app/service/stats_service.py
index faf30f9..45caa17 100644
--- a/app/service/stats_service.py
+++ b/app/service/stats_service.py
@@ -107,7 +107,9 @@ async def get_api_call_details(period: str) -> list[dict]:
         # Convert results to list of dicts and map status_code
         details = []
         for row in results:
-            status = 'success' if 200 <= row['status_code'] < 300 else 'failure'
+            status = 'failure' # 默认状态为 failure，如果 status_code 有效且在 200-299 范围内则更新为 success
+            if row['status_code'] is not None: # 检查 status_code 是否为空
+                status = 'success' if 200 <= row['status_code'] < 300 else 'failure'
             details.append({
                 "timestamp": row['timestamp'].isoformat(), # Use ISO format for JS compatibility
                 "key": row['key'],