refactor(config, telegram_bot): Simplify GPTMail API key configuration and remove redundant Telegram enabled flag

- Simplify GPTMail API key initialization logic by removing separate api_key and api_keys variables and consolidating into single line with fallback to ["gpt-test"]
- Update config.toml.example to use api_keys list format instead of deprecated api_key single value
- Remove TELEGRAM_ENABLED configuration variable and related check from telegram_bot.py
- Simplify Telegram Bot startup validation to only check for bot_token and admin_chat_ids
- Update default auth_provider from "cpa" to "s2a" in config.toml.example
- Improve documentation comments in config.toml.example for GPTMail domains and CRS service
- Localize error messages in telegram_bot.py to Chinese for consistency
- Streamline configuration by removing unnecessary intermediate variables and checks

telegram_bot.py

@@ -19,7 +19,6 @@ from telegram.ext import (
 from config import (
     TELEGRAM_BOT_TOKEN,
     TELEGRAM_ADMIN_CHAT_IDS,
-    TELEGRAM_ENABLED,
     TEAMS,
     AUTH_PROVIDER,
     TEAM_JSON_FILE,
@@ -1332,16 +1331,12 @@ class ProvisionerBot:
 
 async def main():
     """主函数"""
-    if not TELEGRAM_ENABLED:
-        print("Telegram Bot is disabled. Set telegram.enabled = true in config.toml")
-        sys.exit(1)
-
     if not TELEGRAM_BOT_TOKEN:
-        print("Telegram Bot Token not configured. Set telegram.bot_token in config.toml")
+        print("Telegram Bot Token 未配置，请在 config.toml 中设置 telegram.bot_token")
         sys.exit(1)
 
     if not TELEGRAM_ADMIN_CHAT_IDS:
-        print("No admin chat IDs configured. Set telegram.admin_chat_ids in config.toml")
+        print("管理员 Chat ID 未配置，请在 config.toml 中设置 telegram.admin_chat_ids")
         sys.exit(1)
 
     bot = ProvisionerBot()
@@ -1349,7 +1344,7 @@ async def main():
     # 处理 Ctrl+C
     import signal
     def signal_handler(sig, frame):
-        log.info("Shutting down...")
+        log.info("正在关闭...")
         bot.request_shutdown()
 
     signal.signal(signal.SIGINT, signal_handler)