i18n(usage-tooltips): polish zh Compact tooltip wording

The zh Compact tooltip read like an instruction ('only use the tightest
window'). Reword to a descriptive summary parallel to Detailed. Keep the
'tightest = highest-usage window' meaning (getTightestUsageSection picks
max usedPercent) rather than CodeRabbit's '最短/shortest', which would
misdescribe it as the shortest-duration window.

src/renderer/src/i18n/locales/zh.json

@@ -3289,7 +3289,7 @@
             "compact": "Compact",
             "footerDetailAria": "Usage footer detail",
             "detailedTooltip": "完整使用情况，包含条形图、标签和百分比",
-            "compactTooltip": "压缩使用：只使用最紧的窗口"
+            "compactTooltip": "精简使用情况：仅显示最吃紧的窗口"
           }
         }
       },