feat: add var DISABLE_CUSTOM_ADDRESS_NAME and CREATE_ADDRESS_DEFAULT_… (#717)

* feat: add var DISABLE_CUSTOM_ADDRESS_NAME and CREATE_ADDRESS_DEFAULT_DOMAIN_FIRST

* fix: enhance input validation with trim() for address creation

- Add trim() handling in newAddress() function to prevent whitespace issues
- Add trim() handling for address prefixes to ensure consistent formatting
- Add trim() handling in Telegram API address parsing for robustness
- Prevents edge cases with whitespace-only or padded input strings

🤖 Generated with [Claude Code](https://claude.ai/code)

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

---------

Co-authored-by: Claude <noreply@anthropic.com>

worker/src/telegram_api/telegram.ts

@@ -18,7 +18,7 @@ const COMMANDS = [
     },
     {
         command: "new",
-        description: "新建邮箱地址, 如果要自定义邮箱地址, 请输入 /new <name>@<domain>, name [a-z0-9] 有效"
+        description: "新建邮箱地址, 如果要自定义邮箱地址, 请输入 /new, 通过 /new <name>@<domain> 可以指定, name [a-z0-9] 有效, name 为空则随机生成, @<domain> 可选"
     },
     {
         command: "address",