feat: production branch with deploy config for baota panel

- Add deploy/ directory with production env, supervisor, nginx, migration configs
- Include all latest features: admin management, feedback, footer with ICP/beian
- Database: foreign_trade (PostgreSQL), user: foreign_trade
- Frontend: trade.yuzhiran.com, backend proxy via Nginx

deploy/database/migrate.sh

@@ -0,0 +1,29 @@
+#!/bin/bash
+# 生产数据库迁移脚本
+# 使用方式: bash deploy/database/migrate.sh
+# 注意：需先在 backend/ 目录下配置好 .env 或设置好环境变量
+
+set -e
+
+cd "$(dirname "$0")/../../backend"
+
+# 检查 .env 是否存在
+if [ ! -f ".env" ]; then
+    echo "❌ 未找到 .env 文件，请先复制 deploy/backend/.env.production 到 backend/.env"
+    echo "   cp deploy/backend/.env.production backend/.env"
+    echo "   然后编辑 .env 填入 SECRET_KEY 和 AI API Key"
+    exit 1
+fi
+
+echo "🔧 激活虚拟环境..."
+if [ -d "venv" ]; then
+    source venv/bin/activate
+fi
+
+echo "📦 安装/更新依赖..."
+pip install -r requirements.txt -q
+
+echo "🗄️  运行数据库迁移..."
+alembic upgrade head
+
+echo "✅ 迁移完成"