feat(ui): 添加通知横幅组件并调整UI位置

添加全局通知横幅组件，支持多语言和多种状态类型。同时调整Toast组件和开发指示器的位置。

web/src/app/[lang]/page.tsx

@@ -9,6 +9,7 @@ import AudioPlayer from '@/components/AudioPlayer';
 import SettingsForm from '@/components/SettingsForm';
 import PointsOverview from '@/components/PointsOverview'; // 导入 PointsOverview
 import LoginModal from '@/components/LoginModal'; // 导入 LoginModal
+import NotificationBanner from '@/components/NotificationBanner'; // 导入 NotificationBanner
 import { ToastContainer, useToast } from '@/components/Toast';
 import { usePreventDuplicateCall } from '@/hooks/useApiCall';
 import { trackedFetch } from '@/utils/apiCallTracker';
@@ -418,6 +419,11 @@ export default function HomePage({ params }: { params: Promise<{ lang: string }>
 
   return (
     <div className="flex min-h-screen bg-white">
+      <NotificationBanner
+        messageKey="notificationBanner.notificationBannerMessage"
+        type="info"
+        lang={lang}
+      />
       {/* 侧边栏 */}
       <Sidebar
         currentView={uiState.currentView}

web/src/components/NotificationBanner.tsx

@@ -0,0 +1,113 @@
+'use client';
+
+import React, { useState, useEffect } from 'react';
+import { useTranslation } from '../i18n/client';
+
+interface NotificationBannerProps {
+  messageKey: string;
+  type?: 'info' | 'success' | 'warning' | 'error';
+  onClose?: () => void;
+  lang: string;
+}
+
+const NotificationBanner: React.FC<NotificationBannerProps> = ({
+  messageKey,
+  type = 'info',
+  onClose,
+  lang
+}) => {
+  const { t } = useTranslation(lang, 'components');
+  const [isVisible, setIsVisible] = useState(true);
+  const [isClosing, setIsClosing] = useState(false);
+
+  // 从本地存储获取通知状态，避免重复显示
+  useEffect(() => {
+    const hasClosed = localStorage.getItem('notificationBannerClosed');
+    if (hasClosed) {
+      setIsVisible(false);
+    }
+  }, []);
+
+  const handleClose = () => {
+    setIsClosing(true);
+    // 添加关闭动画
+    setTimeout(() => {
+      setIsVisible(false);
+      localStorage.setItem('notificationBannerClosed', 'true');
+      if (onClose) onClose();
+    }, 300);
+  };
+
+  if (!isVisible) return null;
+
+  // 根据类型设置样式
+  const getTypeStyles = () => {
+    switch (type) {
+      case 'success':
+        return 'bg-green-50 text-green-800 border-green-200';
+      case 'warning':
+        return 'bg-yellow-50 text-yellow-800 border-yellow-200';
+      case 'error':
+        return 'bg-red-50 text-red-800 border-red-200';
+      default:
+        return 'bg-blue-50 text-blue-800 border-blue-200';
+    }
+  };
+
+  return (
+    <div className={`fixed top-0 left-0 right-0 z-0 transition-all duration-300 ease-in-out transform ${
+      isClosing ? '-translate-y-full' : 'translate-y-0'
+    }`}>
+      <div className={`border-b ${getTypeStyles()} shadow-sm mx-auto`}>
+        <div className="mx-auto px-4 py-3 sm:px-6">
+          <div className="flex items-center justify-between">
+            <div className="flex-grow flex justify-center w-4/5">
+              <div className="flex items-center">
+                <div className="flex-shrink-0">
+                  {type === 'success' && (
+                    <svg className="h-5 w-5 text-green-400" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 20 20" fill="currentColor">
+                      <path fillRule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zm3.707-9.293a1 1 0 00-1.414-1.414L9 10.586 7.707 9.293a1 1 0 00-1.414 1.414l2 2a1 1 0 001.414 0l4-4z" clipRule="evenodd" />
+                    </svg>
+                  )}
+                  {type === 'warning' && (
+                    <svg className="h-5 w-5 text-yellow-400" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 20 20" fill="currentColor">
+                      <path fillRule="evenodd" d="M8.257 3.099c.765-1.36 2.722-1.36 3.486 0l5.58 9.92c.75 1.334-.213 2.98-1.742 2.98H4.42c-1.53 0-2.493-1.646-1.743-2.98l5.58-9.92zM11 13a1 1 0 11-2 0 1 1 0 012 0zm-1-8a1 1 0 00-1 1v3a1 1 0 002 0V6a1 1 0 00-1-1z" clipRule="evenodd" />
+                    </svg>
+                  )}
+                  {type === 'error' && (
+                    <svg className="h-5 w-5 text-red-400" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 20 20" fill="currentColor">
+                      <path fillRule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zM8.707 7.293a1 1 0 00-1.414 1.414L8.586 10l-1.293 1.293a1 1 0 101.414 1.414L10 11.414l1.293 1.293a1 1 0 001.414-1.414L11.414 10l1.293-1.293a1 1 0 00-1.414-1.414L10 8.586 8.707 7.293z" clipRule="evenodd" />
+                    </svg>
+                  )}
+                  {type === 'info' && (
+                    <svg className="h-5 w-5 text-blue-400" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 20 20" fill="currentColor">
+                      <path fillRule="evenodd" d="M18 10a8 8 0 11-16 0 8 8 0 0116 0zm-7-4a1 1 0 11-2 0 1 1 0 012 0zM9 9a1 1 0 000 2v3a1 1 0 001 1h1a1 1 0 100-2v-3a1 1 0 00-1-1H9z" clipRule="evenodd" />
+                    </svg>
+                  )}
+                </div>
+                <div className="ml-3">
+                  <p className="text-sm font-medium">{t(messageKey)}</p>
+                </div>
+              </div>
+            </div>
+            <div className="flex-shrink-0">
+              <button
+                onClick={handleClose}
+                onTouchEnd={() => handleClose()}
+                className="inline-flex rounded-md p-1.5 focus:outline-none focus:ring-2 focus:ring-offset-2"
+                aria-label={t('notificationBanner.close')}
+              >
+                <span className="sr-only">{t('close')}</span>
+                <svg className="h-5 w-5" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 20 20" fill="currentColor">
+                  <path fillRule="evenodd" d="M4.293 4.293a1 1 0 011.414 0L10 8.586l4.293-4.293a1 1 0 111.414 1.414L11.414 10l4.293 4.293a1 1 0 01-1.414 1.414L10 11.414l-4.293 4.293a1 1 0 01-1.414-1.414L8.586 10 4.293 5.707a1 1 0 010-1.414z" clipRule="evenodd" />
+                </svg>
+              </button>
+            </div>
+          </div>
+        </div>
+      </div>
+    </div>
+  );
+};
+
+export default NotificationBanner;

web/src/components/Toast.tsx

@@ -121,7 +121,7 @@ const Toast: React.FC<ToastProps> = ({
    onRemove,
  }) => {
    return (
-     <div className="fixed top-4 left-1/2 -translate-x-1/2 z-50 w-full max-w-md p-4 flex flex-col items-center space-y-3"> {/* 定位到顶部水平居中，并限制宽度，使用flex布局垂直居中，增加间距 */}
+     <div className="fixed top-0 left-1/2 -translate-x-1/2 z-50 w-full max-w-md p-4 flex flex-col items-center space-y-3"> {/* 定位到顶部水平居中，并限制宽度，使用flex布局垂直居中，增加间距 */}
        {toasts.map((toast) => (
          <Toast
            key={toast.id}