diff --git a/components/sidebar/sidebar-data-list.tsx b/components/sidebar/sidebar-data-list.tsx
index 4481506..f4d670d 100644
--- a/components/sidebar/sidebar-data-list.tsx
+++ b/components/sidebar/sidebar-data-list.tsx
@@ -38,6 +38,13 @@ export const SidebarDataList: FC<SidebarDataListProps> = ({
 
   const { t } = useTranslation();
 
+  const dateCategories = [
+    { key: "Today", label: t("side.chatTime.Today") },
+    { key: "Yesterday", label: t("side.chatTime.Yesterday") },
+    { key: "PreviousWeek", label: t("side.chatTime.PreviousWeek") },
+    { key: "Older", label: t("side.chatTime.Older") }
+  ]
+  
   const {
     setChats,
     setPresets,
@@ -100,7 +107,7 @@ export const SidebarDataList: FC<SidebarDataListProps> = ({
 
   const getSortedData = (
     data: any,
-    dateCategory: "Today" | "Yesterday" | "Previous Week" | "Older"
+    dateCategory: "Today" | "Yesterday" | "PreviousWeek" | "Older"
   ) => {
     const now = new Date()
     const todayStart = new Date(now.setHours(0, 0, 0, 0))
@@ -274,7 +281,7 @@ export const SidebarDataList: FC<SidebarDataListProps> = ({
 
             {contentType === "chats" ? (
               <>
-                {["Today", "Yesterday", "Previous Week", "Older"].map(
+                {/* {["Today", "Yesterday", "Previous Week", "Older"].map(
                   dateCategory => {
                     const sortedData = getSortedData(
                       dataWithoutFolders,
@@ -283,13 +290,23 @@ export const SidebarDataList: FC<SidebarDataListProps> = ({
                         | "Yesterday"
                         | "Previous Week"
                         | "Older"
-                    )
+                    ) */}
+                {dateCategories.map(({ key, label }) => {
+                  const sortedData = getSortedData(
+                    dataWithoutFolders,
+                    key as "Today" | "Yesterday" | "Previous Week" | "Older"
+                  )
 
                     return (
+                      // sortedData.length > 0 && (
+                      //   <div key={dateCategory} className="pb-2">
+                      //     <div className="text-muted-foreground mb-1 text-sm font-bold">
+                      //       {dateCategory}
+                      //     </div>
                       sortedData.length > 0 && (
-                        <div key={dateCategory} className="pb-2">
+                        <div key={key} className="pb-2"> {/* ✅ 用 key 替代已删的变量 */}
                           <div className="text-muted-foreground mb-1 text-sm font-bold">
-                            {dateCategory}
+                            {label} {/* ✅ 用 label 显示翻译文本 */}
                           </div>
 
                           <div
diff --git a/public/locales/en/translation.json b/public/locales/en/translation.json
index f4e232b..abb163f 100644
--- a/public/locales/en/translation.json
+++ b/public/locales/en/translation.json
@@ -13,6 +13,12 @@
   },
   
   "login": {
+    "chatTime": {
+      "Today": "Today",
+      "Yesterday": "Yesterday",
+      "PreviousWeek": "Previous Week",
+      "Older": "Older"
+    },
     "email": "Email",
     "emailPlaceholder": "you@example.com",
     "password": "Password",
diff --git a/public/locales/ja/translation.json b/public/locales/ja/translation.json
index a7fa44e..20fcfef 100644
--- a/public/locales/ja/translation.json
+++ b/public/locales/ja/translation.json
@@ -127,6 +127,12 @@
     },
 
     "side": {
+      "chatTime": {
+        "Today": "今日",
+        "Yesterday": "昨日",
+        "PreviousWeek": "先週",
+        "Older": "それ以前"
+      },
       "selectWorkspace": "ワークスペースを選択...",
       "newWorkspace": "新しいワークスペース",
       "searchWorkspaces": "ワークスペースを検索...",
diff --git a/public/locales/zh/translation.json b/public/locales/zh/translation.json
index 49fa5cd..8a7f3b6 100644
--- a/public/locales/zh/translation.json
+++ b/public/locales/zh/translation.json
@@ -127,6 +127,12 @@
   },
 
   "side": {
+    "chatTime": {
+      "Today": "今天",
+      "Yesterday": "昨天",
+      "PreviousWeek": "上周",
+      "Older": "更早"
+    },
     "selectWorkspace": "选择工作区...",
     "newWorkspace": "新建工作区",
     "searchWorkspaces": "搜索工作区...",