Add React frontend and Django backend code

- React components: Dashboard, MemoryCalendar, SearchBox, ToolList
- Django backend structure
- Package configuration files

code/frontend/src/pages/Dashboard/index.js

@@ -0,0 +1,60 @@
+import React, { useState, useEffect } from 'react';
+import axios from 'axios';
+
+const API_BASE = 'http://localhost:8000/api';
+
+function Dashboard() {
+  const [lobsters, setLobsters] = useState([]);
+  const [loading, setLoading] = useState(true);
+
+  useEffect(() => {
+    fetchLobsters();
+    const interval = setInterval(fetchLobsters, 5000);
+    return () => clearInterval(interval);
+  }, []);
+
+  const fetchLobsters = async () => {
+    try {
+      const response = await axios.get(`${API_BASE}/lobsters/`);
+      setLobsters(response.data);
+      setLoading(false);
+    } catch (error) {
+      console.error('获取龙虾状态失败:', error);
+    }
+  };
+
+  if (loading) {
+    return <div className="loading">加载中...</div>;
+  }
+
+  return (
+    <div className="dashboard">
+      <h1>🦞 龙虾舰队监控中心</h1>
+      <div className="lobster-grid">
+        {lobsters.map(lobster => (
+          <div key={lobster.id} className="lobster-card">
+            <div className="lobster-header">
+              <span className="lobster-name">{lobster.emoji} {lobster.name}</span>
+              <span className={`status status-${lobster.status}`}>{lobster.status}</span>
+            </div>
+            <div className="lobster-info">
+              <p>专长：{lobster.specialty}</p>
+              <p>端口：{lobster.port}</p>
+              <p>容器：{lobster.container}</p>
+            </div>
+            <div className="lobster-actions">
+              <button onClick={() => window.location.href = `/lobster/${lobster.id}`}>
+                📊 详情
+              </button>
+              <button onClick={() => window.location.href = `/lobster/${lobster.id}/memory`}>
+                🧠 记忆
+              </button>
+            </div>
+          </div>
+        ))}
+      </div>
+    </div>
+  );
+}
+
+export default Dashboard;