Update tooltip messages from "正在生成中，请稍候..." to "操作暂时被禁用"
in MessageActions component to better reflect that actions can be disabled
during both message generation and editing states.
Changes:
- Replace specific "generating" message with generic "temporarily disabled" message
- Applies to retry, edit, role toggle, and delete action tooltips
- Provides more accurate user feedback for disabled states
Files modified:
- web/src/components/playground/MessageActions.js
