tui: update compaction status message to use Session instead of History across all languages

The compaction message now correctly indicates the current session was compacted rather than the entire history, making it clearer to users which conversation data was optimized.

packages/ui/src/i18n/zh.ts

@@ -64,7 +64,7 @@ export const dict = {
   "ui.sessionTurn.status.consideringNextSteps": "正在考虑下一步",
 
   "ui.messagePart.questions.dismissed": "问题已忽略",
-  "ui.messagePart.compaction": "历史已压缩",
+  "ui.messagePart.compaction": "会话已压缩",
   "ui.messagePart.context.read.one": "{{count}} 次读取",
   "ui.messagePart.context.read.other": "{{count}} 次读取",
   "ui.messagePart.context.search.one": "{{count}} 次搜索",