feat: 支持多语言提示词本地化和界面优化

- 添加 prompt_locale 参数支持简体中文、繁体中文和英文提示词本地化
- 移除内置 agents 配置以简化系统架构
- 更新 ContextBuilder 使用动态提示词模板而非硬编码内容
- 在 AgentLoop、Web 接口和 AgentService 中传递 locale 参数
- 添加输出语言指令确保用户界面内容按指定语言生成
- 扩展前端 LanguageSwitcher 组件支持三种语言选项
- 优化 Header 和侧边栏组件的响应式布局和文本截断处理
- 更新测试用例验证不同语言环境下的提示词正确性

app-instance/frontend/components/chat-workbench/CurrentSessionProgressSidebar.tsx

@@ -21,17 +21,19 @@ function ProgressPanel({
   const { locale } = useAppI18n();
 
   return (
-    <div className="flex h-full flex-col bg-[#FBFAF9]">
-      <div className="flex h-16 shrink-0 items-center justify-between border-b border-[#E6E1DE] px-5">
-        <div>
-          <h2 className="text-base font-semibold text-foreground">
+    <div className="flex h-full min-w-0 flex-col overflow-hidden bg-[#FBFAF9]">
+      <div className="flex h-16 min-w-0 shrink-0 items-center justify-between gap-3 border-b border-[#E6E1DE] px-5">
+        <div className="min-w-0">
+          <h2 className="truncate text-base font-semibold text-foreground">
             {pickAppText(locale, '当前会话的运行进度', 'Current Session Progress')}
           </h2>
-          <p className="flex items-center gap-1.5 text-xs text-muted-foreground">
+          <p className="flex min-w-0 items-center gap-1.5 text-xs text-muted-foreground">
             {isLive ? <Activity className="h-3.5 w-3.5" /> : null}
-            {isLive
-              ? pickAppText(locale, '任务时间线实时更新', 'Task timeline updates live')
-              : pickAppText(locale, '与任务详情时间线一致', 'Matches the Task detail timeline')}
+            <span className="truncate">
+              {isLive
+                ? pickAppText(locale, '任务时间线实时更新', 'Task timeline updates live')
+                : pickAppText(locale, '与任务详情时间线一致', 'Matches the Task detail timeline')}
+            </span>
           </p>
         </div>
         {onClose ? (
@@ -46,8 +48,8 @@ function ProgressPanel({
         ) : null}
       </div>
 
-      <ScrollArea className="min-h-0 flex-1 px-4 py-4">
-        <div className="pb-6">
+      <ScrollArea className="min-h-0 min-w-0 flex-1 overflow-hidden px-4 py-4">
+        <div className="min-w-0 max-w-full pb-6">
           <TaskTimeline cards={cards} isLive={isLive} showHeader={false} />
         </div>
       </ScrollArea>
@@ -67,7 +69,7 @@ export function CurrentSessionProgressSidebar({
 
   return (
     <>
-      <aside className="hidden h-full w-[380px] shrink-0 border-l border-[#E6E1DE] xl:flex">
+      <aside className="hidden h-full w-[380px] min-w-0 shrink-0 overflow-hidden border-l border-[#E6E1DE] xl:flex">
         <ProgressPanel cards={cards} isLive={isLive} />
       </aside>
 
@@ -88,7 +90,7 @@ export function CurrentSessionProgressSidebar({
             onClick={() => setMobileOpen(false)}
             aria-label={pickAppText(locale, '关闭进度面板', 'Close progress panel')}
           />
-          <div className="absolute inset-y-0 right-0 w-[min(92vw,390px)] border-l border-[#E6E1DE] shadow-2xl">
+          <div className="absolute inset-y-0 right-0 w-[min(92vw,390px)] min-w-0 overflow-hidden border-l border-[#E6E1DE] shadow-2xl">
             <ProgressPanel cards={cards} isLive={isLive} onClose={() => setMobileOpen(false)} />
           </div>
         </div>