Conversation rows always reserved space for the more-actions button, and the active row kept it visible. The button now replaces the right-side timestamp only on hover, keyboard focus, or while its menu is open, leaving more room for conversation titles and timestamps by default.
Release note: 会话列表仅在悬停或键盘聚焦时显示更多操作按钮，更新时间默认更靠右，为会话标题留出更多空间。
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