add: 添加公告

app/components/Announcement.jsx

@@ -0,0 +1,82 @@
+'use client';
+
+import { useState, useEffect } from 'react';
+import { motion, AnimatePresence } from 'framer-motion';
+
+export default function Announcement() {
+  const [isVisible, setIsVisible] = useState(false);
+
+  useEffect(() => {
+    const hasClosed = localStorage.getItem('hasClosedAnnouncement_v1');
+    if (!hasClosed) {
+      setIsVisible(true);
+    }
+  }, []);
+
+  const handleClose = () => {
+    localStorage.setItem('hasClosedAnnouncement_v1', 'true');
+    setIsVisible(false);
+  };
+
+  return (
+    <AnimatePresence>
+      {isVisible && (
+        <motion.div
+          initial={{ opacity: 0 }}
+          animate={{ opacity: 1 }}
+          exit={{ opacity: 0 }}
+          style={{
+            position: 'fixed',
+            inset: 0,
+            zIndex: 100,
+            display: 'flex',
+            alignItems: 'center',
+            justifyContent: 'center',
+            background: 'rgba(0, 0, 0, 0.6)',
+            backdropFilter: 'blur(4px)',
+            padding: '20px',
+          }}
+        >
+          <motion.div
+            initial={{ scale: 0.95, opacity: 0, y: 10 }}
+            animate={{ scale: 1, opacity: 1, y: 0 }}
+            exit={{ scale: 0.95, opacity: 0, y: 10 }}
+            className="glass"
+            style={{
+              width: '100%',
+              maxWidth: '400px',
+              padding: '24px',
+              position: 'relative',
+              display: 'flex',
+              flexDirection: 'column',
+              gap: '16px',
+            }}
+          >
+            <div className="title" style={{ display: 'flex', alignItems: 'center', gap: '12px', fontWeight: 700, fontSize: '18px', color: 'var(--accent)' }}>
+              <svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round">
+                <path d="M10.29 3.86L1.82 18a2 2 0 0 0 1.71 3h16.94a2 2 0 0 0 1.71-3L13.71 3.86a2 2 0 0 0-3.42 0z"></path>
+                <line x1="12" y1="9" x2="12" y2="13"></line>
+                <line x1="12" y1="17" x2="12.01" y2="17"></line>
+              </svg>
+              <span>公告</span>
+            </div>
+            
+            <div style={{ color: 'var(--text)', lineHeight: '1.6', fontSize: '15px' }}>
+              已解决并发刷新导致数据错乱问题，遇到有问题的数据可以删除后重新添加，抱歉给您带来的不便。
+            </div>
+
+            <div style={{ display: 'flex', justifyContent: 'flex-end', marginTop: '8px' }}>
+              <button 
+                className="button" 
+                onClick={handleClose}
+                style={{ width: '100%', justifyContent: 'center', display: 'flex', alignItems: 'center' }}
+              >
+                我知道了
+              </button>
+            </div>
+          </motion.div>
+        </motion.div>
+      )}
+    </AnimatePresence>
+  );
+}

app/page.jsx

@@ -2,6 +2,7 @@
 
 import { useEffect, useRef, useState } from 'react';
 import { motion, AnimatePresence } from 'framer-motion';
+import Announcement from "./components/Announcement";
 
 function PlusIcon(props) {
   return (
@@ -448,6 +449,7 @@ export default function HomePage() {
 
   return (
     <div className="container content">
+      <Announcement />
       <div className="navbar glass">
         {refreshing && <div className="loading-bar"></div>}
         <div className="brand">