fix: 修复 damo_balance 引号语法错误及 chatai bleach 缺失依赖

- damo_balance/__init__.py: 将外层字符串改为单引号，消除内嵌双引号引起的 SyntaxError
- chatai/screenshot.py: bleach 改为 try/except 可选导入，无 bleach 时降级跳过 HTML 净化
- requirements.txt: 补充 openai>=1.0.0 与 pyppeteer>=1.0.2 依赖声明

requirements.txt

@@ -8,6 +8,8 @@ arclet-alconna==1.8.35
 arclet-alconna-tools==0.7.10
 argcomplete==3.5.2
 async-timeout==5.0.1
+openai>=1.0.0
+pyppeteer>=1.0.2
 beautifulsoup4==4.12.3
 bleach==6.2.0
 bs4==0.0.2