fix(danding_api): 手动读取环境变量兜底token配置

get_plugin_config(BaseSettings) 不一定从 .env 读取环境变量，
直接用 os.environ.get 兜底确保 DANDING_API_TOKEN 能被加载。

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

danding_bot/plugins/danding_api/utils.py

@@ -1,3 +1,4 @@
+import os
 import asyncio
 import aiohttp
 from nonebot import get_plugin_config
@@ -5,6 +6,12 @@ from .config import Config
 from nonebot import logger
 
 plugin_config = get_plugin_config(Config)
+
+# get_plugin_config 不一定读取环境变量，手动兜底
+if not plugin_config.Token:
+    plugin_config.Token = os.environ.get("DANDING_API_TOKEN", "")
+if not plugin_config.EMAIL_PASSWORD:
+    plugin_config.EMAIL_PASSWORD = os.environ.get("DANDING_EMAIL_PASSWORD", "")
 router:dict = {
     "在线人数":"bot_online_count",
     "添加卡密":"bot_add_kami",