diff --git a/src/components/sessions/SessionItem.tsx b/src/components/sessions/SessionItem.tsx
index 628474e3..14bf601d 100644
--- a/src/components/sessions/SessionItem.tsx
+++ b/src/components/sessions/SessionItem.tsx
@@ -70,7 +70,7 @@ export function SessionItem({
       <div className="flex items-center gap-1 text-[11px] text-muted-foreground">
         <Clock className="size-3" />
         <span>
-          {lastActive ? formatRelativeTime(lastActive) : t("common.unknown")}
+          {lastActive ? formatRelativeTime(lastActive, t) : t("common.unknown")}
         </span>
       </div>
     </button>
diff --git a/src/components/sessions/SessionManagerPage.tsx b/src/components/sessions/SessionManagerPage.tsx
index c25291c3..b1201b35 100644
--- a/src/components/sessions/SessionManagerPage.tsx
+++ b/src/components/sessions/SessionManagerPage.tsx
@@ -288,7 +288,7 @@ export function SessionManagerPage() {
                             <Search className="size-3.5" />
                           </Button>
                         </TooltipTrigger>
-                        <TooltipContent>搜索会话</TooltipContent>
+                        <TooltipContent>{t("sessionManager.searchSessions")}</TooltipContent>
                       </Tooltip>
 
                       <Select
@@ -482,7 +482,7 @@ export function SessionManagerPage() {
                                   {selectedSession.projectDir}
                                 </p>
                                 <p className="text-muted-foreground mt-1">
-                                  点击复制路径
+                                  {t("sessionManager.clickToCopyPath")}
                                 </p>
                               </TooltipContent>
                             </Tooltip>
diff --git a/src/components/sessions/SessionMessageItem.tsx b/src/components/sessions/SessionMessageItem.tsx
index 805d50ba..07246d7b 100644
--- a/src/components/sessions/SessionMessageItem.tsx
+++ b/src/components/sessions/SessionMessageItem.tsx
@@ -59,7 +59,7 @@ export function SessionMessageItem({
       </Tooltip>
       <div className="flex items-center justify-between text-xs mb-1.5 pr-6">
         <span className={cn("font-semibold", getRoleTone(message.role))}>
-          {getRoleLabel(message.role)}
+          {getRoleLabel(message.role, t)}
         </span>
         {message.ts && (
           <span className="text-muted-foreground">
diff --git a/src/components/sessions/SessionToc.tsx b/src/components/sessions/SessionToc.tsx
index 650bf5b3..6269c4cd 100644
--- a/src/components/sessions/SessionToc.tsx
+++ b/src/components/sessions/SessionToc.tsx
@@ -1,4 +1,5 @@
 import { List, X } from "lucide-react";
+import { useTranslation } from "react-i18next";
 import { cn } from "@/lib/utils";
 import { Button } from "@/components/ui/button";
 import { ScrollArea } from "@/components/ui/scroll-area";
@@ -26,6 +27,7 @@ export function SessionTocSidebar({
   items,
   onItemClick,
 }: SessionTocSidebarProps) {
+  const { t } = useTranslation();
   if (items.length <= 2) return null;
 
   return (
@@ -33,7 +35,7 @@ export function SessionTocSidebar({
       <div className="p-3 border-b">
         <div className="flex items-center gap-1.5 text-xs font-medium text-muted-foreground">
           <List className="size-3.5" />
-          <span>对话目录</span>
+          <span>{t("sessionManager.tocTitle")}</span>
         </div>
       </div>
       <ScrollArea className="h-[calc(100%-40px)]">
@@ -74,6 +76,7 @@ export function SessionTocDialog({
   open,
   onOpenChange,
 }: SessionTocDialogProps) {
+  const { t } = useTranslation();
   if (items.length <= 2) return null;
 
   return (
@@ -95,11 +98,11 @@ export function SessionTocDialog({
         <DialogHeader className="px-4 py-3 relative border-b">
           <DialogTitle className="flex items-center gap-2 text-base font-semibold">
             <List className="size-4 text-primary" />
-            对话目录
+            {t("sessionManager.tocTitle")}
           </DialogTitle>
           <DialogClose
             className="absolute right-3 top-1/2 -translate-y-1/2 rounded-full p-1.5 hover:bg-muted transition-colors focus:outline-none focus:ring-2 focus:ring-primary focus:ring-offset-2"
-            aria-label="关闭"
+            aria-label={t("common.close")}
           >
             <X className="size-4 text-muted-foreground" />
           </DialogClose>
diff --git a/src/components/sessions/utils.ts b/src/components/sessions/utils.ts
index 0cb4aa23..fda5f6d4 100644
--- a/src/components/sessions/utils.ts
+++ b/src/components/sessions/utils.ts
@@ -17,7 +17,10 @@ export const formatTimestamp = (value?: number) => {
   return new Date(value).toLocaleString();
 };
 
-export const formatRelativeTime = (value?: number) => {
+export const formatRelativeTime = (
+  value: number | undefined,
+  t: (key: string, options?: Record<string, unknown>) => string
+) => {
   if (!value) return "";
   const now = Date.now();
   const diff = now - value;
@@ -25,10 +28,10 @@ export const formatRelativeTime = (value?: number) => {
   const hours = Math.floor(diff / 3600000);
   const days = Math.floor(diff / 86400000);
 
-  if (minutes < 1) return "刚刚";
-  if (minutes < 60) return `${minutes} 分钟前`;
-  if (hours < 24) return `${hours} 小时前`;
-  if (days < 7) return `${days} 天前`;
+  if (minutes < 1) return t("sessionManager.justNow");
+  if (minutes < 60) return t("sessionManager.minutesAgo", { count: minutes });
+  if (hours < 24) return t("sessionManager.hoursAgo", { count: hours });
+  if (days < 7) return t("sessionManager.daysAgo", { count: days });
   return new Date(value).toLocaleDateString();
 };
 
@@ -57,12 +60,15 @@ export const getRoleTone = (role: string) => {
   return "text-muted-foreground";
 };
 
-export const getRoleLabel = (role: string) => {
+export const getRoleLabel = (
+  role: string,
+  t: (key: string) => string
+) => {
   const normalized = role.toLowerCase();
   if (normalized === "assistant") return "AI";
-  if (normalized === "user") return "用户";
-  if (normalized === "system") return "系统";
-  if (normalized === "tool") return "工具";
+  if (normalized === "user") return t("sessionManager.roleUser");
+  if (normalized === "system") return t("sessionManager.roleSystem");
+  if (normalized === "tool") return t("sessionManager.roleTool");
   return role;
 };
 
diff --git a/src/i18n/locales/en.json b/src/i18n/locales/en.json
index 2fd797ab..1053a7ca 100644
--- a/src/i18n/locales/en.json
+++ b/src/i18n/locales/en.json
@@ -404,6 +404,7 @@
     "title": "Session Manager",
     "subtitle": "Manage Codex and Claude Code sessions",
     "searchPlaceholder": "Search by content, directory, or ID",
+    "searchSessions": "Search sessions",
     "providerFilterAll": "All",
     "sessionList": "Sessions",
     "loadingSessions": "Loading sessions...",
@@ -427,7 +428,16 @@
     "copySourcePath": "Copy source file",
     "sourcePathCopied": "Source file copied",
     "loadingMessages": "Loading transcript...",
-    "emptySession": "No messages available"
+    "emptySession": "No messages available",
+    "clickToCopyPath": "Click to copy path",
+    "tocTitle": "Contents",
+    "justNow": "Just now",
+    "minutesAgo": "{{count}} min ago",
+    "hoursAgo": "{{count}} hr ago",
+    "daysAgo": "{{count}} days ago",
+    "roleUser": "User",
+    "roleSystem": "System",
+    "roleTool": "Tool"
   },
   "console": {
     "providerSwitchReceived": "Received provider switch event:",
diff --git a/src/i18n/locales/ja.json b/src/i18n/locales/ja.json
index 371496c5..2a47b501 100644
--- a/src/i18n/locales/ja.json
+++ b/src/i18n/locales/ja.json
@@ -404,6 +404,7 @@
     "title": "セッション管理",
     "subtitle": "Codex / Claude Code のセッションを管理",
     "searchPlaceholder": "内容・ディレクトリ・ID で検索",
+    "searchSessions": "セッションを検索",
     "providerFilterAll": "すべて",
     "sessionList": "セッション一覧",
     "loadingSessions": "セッションを読み込み中...",
@@ -427,7 +428,16 @@
     "copySourcePath": "元ファイルをコピー",
     "sourcePathCopied": "元ファイルをコピーしました",
     "loadingMessages": "内容を読み込み中...",
-    "emptySession": "表示できる内容がありません"
+    "emptySession": "表示できる内容がありません",
+    "clickToCopyPath": "クリックしてパスをコピー",
+    "tocTitle": "目次",
+    "justNow": "たった今",
+    "minutesAgo": "{{count}}分前",
+    "hoursAgo": "{{count}}時間前",
+    "daysAgo": "{{count}}日前",
+    "roleUser": "ユーザー",
+    "roleSystem": "システム",
+    "roleTool": "ツール"
   },
   "console": {
     "providerSwitchReceived": "プロバイダー切り替えイベントを受信:",
diff --git a/src/i18n/locales/zh.json b/src/i18n/locales/zh.json
index fa7a1c88..e3a504ef 100644
--- a/src/i18n/locales/zh.json
+++ b/src/i18n/locales/zh.json
@@ -404,6 +404,7 @@
     "title": "会话管理",
     "subtitle": "管理 Codex 与 Claude Code 会话记录",
     "searchPlaceholder": "搜索会话内容、目录或 ID",
+    "searchSessions": "搜索会话",
     "providerFilterAll": "全部",
     "sessionList": "会话列表",
     "loadingSessions": "加载会话中...",
@@ -427,7 +428,16 @@
     "copySourcePath": "复制原始文件",
     "sourcePathCopied": "原始文件已复制",
     "loadingMessages": "加载会话内容中...",
-    "emptySession": "该会话暂无可展示内容"
+    "emptySession": "该会话暂无可展示内容",
+    "clickToCopyPath": "点击复制路径",
+    "tocTitle": "对话目录",
+    "justNow": "刚刚",
+    "minutesAgo": "{{count}} 分钟前",
+    "hoursAgo": "{{count}} 小时前",
+    "daysAgo": "{{count}} 天前",
+    "roleUser": "用户",
+    "roleSystem": "系统",
+    "roleTool": "工具"
   },
   "console": {
     "providerSwitchReceived": "收到供应商切换事件:",