feat: 优化更新检查逻辑 + 修复按量余额显示（v0.6.5）

src/i18n/en.ts

@@ -318,8 +318,7 @@ export const enTranslations: Record<TranslationKey, string> = {
 
   // Dashboard — footer / attribution
   footerScanned: "Scanned {n} files · {m} records",
-  dashboardAttribution: "Dashboard ported from",
-  sessionsAttribution: "Session manager ported from",
+  attributionPorted: "Dashboard & session manager ported from",
   attributionSuffix: "(MIT, © JochenYang)",
 
   // Sessions — preview

src/i18n/zh.ts

@@ -313,8 +313,7 @@ export const zhTranslations = {
 
   // Dashboard — footer / attribution
   footerScanned: "扫描 {n} 个文件 · {m} 条记录",
-  dashboardAttribution: "仪表盘功能基于",
-  sessionsAttribution: "会话管理功能基于",
+  attributionPorted: "仪表盘与会话管理功能基于",
   attributionSuffix: "（MIT，© JochenYang）移植",
 
   // Sessions — preview