diff --git a/src/renderer/components/communication/ChannelHeader.tsx b/src/renderer/components/communication/ChannelHeader.tsx
index 166f137d..28914677 100644
--- a/src/renderer/components/communication/ChannelHeader.tsx
+++ b/src/renderer/components/communication/ChannelHeader.tsx
@@ -53,7 +53,7 @@ export function ChannelHeader({
           type="button"
           onClick={onShowSidebar}
           className="rounded-[4px] p-1 text-muted-foreground transition hover:text-foreground"
-          aria-label="Show sidebar"
+          aria-label={t("comm.showSidebar")}
         >
           <CaretDown size={12} className="rotate-90" />
         </button>
@@ -64,7 +64,7 @@ export function ChannelHeader({
           <div className="truncate text-[13px] font-semibold text-foreground">{activeChannel.label}</div>
           {activeChannel.kind === "task" && activeTask ? (
             <button type="button" onClick={() => onNavigateToTask(activeTask.id)} className="mt-0.5 text-[11px] font-medium text-primary transition hover:underline">
-              Open task
+              {t("comm.openTask")}
             </button>
           ) : null}
         </div>
diff --git a/src/renderer/components/communication/MessageItem.tsx b/src/renderer/components/communication/MessageItem.tsx
index 5aa94097..95509435 100644
--- a/src/renderer/components/communication/MessageItem.tsx
+++ b/src/renderer/components/communication/MessageItem.tsx
@@ -100,7 +100,7 @@ export const MessageBubble = memo(function MessageBubble({
           ) : null}
           {agent?.department ? (
             <span
-              className="shrink-0 rounded-full bg-muted px-1.5 py-0.5 text-[9px] font-bold uppercase tracking-[0.08em] text-muted-foreground"
+              className="shrink-0 rounded-full bg-muted px-1.5 py-0.5 text-[10px] font-bold uppercase tracking-[0.06em] text-muted-foreground"
             >
               {agent.department.replace("_", " ")}
             </span>
@@ -110,7 +110,7 @@ export const MessageBubble = memo(function MessageBubble({
           </span>
           {message.priority !== "normal" ? (
             <span
-              className={`flex items-center gap-1 rounded-full px-1.5 py-0.5 text-[9px] font-bold uppercase tracking-[0.06em] ${priorityMap[message.priority]?.className ?? ""}`}
+              className={`flex items-center gap-1 rounded-full px-1.5 py-0.5 text-[10px] font-bold uppercase tracking-[0.04em] ${priorityMap[message.priority]?.className ?? ""}`}
             >
               {message.priority === "urgent" ? <WarningCircle size={10} weight="fill" /> : null}
               {priorityMap[message.priority]?.label}
diff --git a/src/renderer/i18n/en.ts b/src/renderer/i18n/en.ts
index d2d40cf0..20cf5bbd 100644
--- a/src/renderer/i18n/en.ts
+++ b/src/renderer/i18n/en.ts
@@ -599,6 +599,7 @@ export const en: Record<string, string> = {
   "comm.adjustFilters": "Try another search or filter",
   "comm.messagesAppear": "No messages yet",
   "comm.openTask": "Open task",
+  "comm.showSidebar": "Show sidebar",
   "comm.selectChannelSend": "Pick a channel first.",
   "comm.replyInDiscussion": "Reply in task discussion...",
   "comm.typeMessage": "Type a message...",
diff --git a/src/renderer/i18n/zh.ts b/src/renderer/i18n/zh.ts
index 9c13e15c..6ad31bf3 100644
--- a/src/renderer/i18n/zh.ts
+++ b/src/renderer/i18n/zh.ts
@@ -599,6 +599,7 @@ export const zh: Record<string, string> = {
   "comm.adjustFilters": "换个搜索或筛选试试",
   "comm.messagesAppear": "暂无消息",
   "comm.openTask": "打开任务",
+  "comm.showSidebar": "显示侧边栏",
   "comm.selectChannelSend": "先选一个频道。",
   "comm.replyInDiscussion": "在任务讨论中回复...",
   "comm.typeMessage": "输入消息...",