Complete backend API and deployment guide

- Django REST API with lobster endpoints
- API views: list, detail, memory, tools
- Deployment guide with instructions
- Startup script for easy launch
- Requirements.txt for dependencies
- API URL routing

start.sh

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+#!/bin/bash
+# 龙虾舰队监控中心 - 启动脚本
+
+echo "🦞 启动龙虾舰队监控中心..."
+
+# 启动后端
+echo "📡 启动 Django 后端..."
+cd code/backend
+python3 manage.py runserver 0.0.0.0:8000 &
+BACKEND_PID=$!
+
+# 等待后端启动
+sleep 3
+
+# 启动前端
+echo "🎨 启动前端服务..."
+cd ../frontend
+python3 -m http.server 3000 &
+FRONTEND_PID=$!
+
+echo ""
+echo "✅ 监控中心已启动！"
+echo ""
+echo "访问地址:"
+echo "  前端：http://localhost:3000"
+echo "  后端 API: http://localhost:8000/api/"
+echo ""
+echo "按 Ctrl+C 停止服务"
+
+# 等待进程
+wait