feat: 环境配置纳入版本管理并更新文档

- 将 .env 和 .env.local 纳入版本管理
- 更新 .gitignore，移除对环境文件的忽略
- 在 README.md 中添加详细的数据库配置和启动说明
- 同步 server/.env 与项目根目录配置
- 修复后端数据库连接问题

sync-db-from-server.sh

@@ -0,0 +1,85 @@
+#!/usr/bin/env bash
+# ============================================================
+# 从服务器同步数据库到本地
+# 用法: bash sync-db-from-server.sh
+# ============================================================
+
+set -euo pipefail
+
+# 服务器配置（从 deploy.sh 读取）
+SERVER="h2agent"
+REMOTE_DB_USER="govai"
+REMOTE_DB_PASS="GovAI@2024Secure"
+REMOTE_DB_NAME="govai_portal"
+
+# 本地数据库配置
+LOCAL_DB_USER="freedak"
+LOCAL_DB_NAME="govai_portal"
+BACKUP_FILE="/tmp/govai_portal_$(date +%Y%m%d_%H%M%S).sql"
+
+GREEN='\033[0;32m'
+BLUE='\033[0;34m'
+RED='\033[0;31m'
+YELLOW='\033[0;33m'
+NC='\033[0m'
+
+log()  { echo -e "${GREEN}[✓]${NC} $1"; }
+step() { echo -e "\n${BLUE}==== $1 ====${NC}"; }
+warn() { echo -e "${YELLOW}[!]${NC} $1"; }
+err()  { echo -e "${RED}[✗]${NC} $1"; exit 1; }
+
+step "从服务器导出数据库"
+log "服务器: $SERVER"
+log "数据库: $REMOTE_DB_NAME"
+
+# 在服务器上导出数据库
+ssh $SERVER "PGPASSWORD='$REMOTE_DB_PASS' pg_dump -h localhost -U $REMOTE_DB_USER -d $REMOTE_DB_NAME --clean --if-exists" > "$BACKUP_FILE"
+
+if [ ! -s "$BACKUP_FILE" ]; then
+    err "数据库导出失败或文件为空"
+fi
+
+log "导出完成: $BACKUP_FILE ($(du -h "$BACKUP_FILE" | cut -f1))"
+
+step "导入到本地数据库"
+warn "这将清空本地数据库 $LOCAL_DB_NAME 的所有数据！"
+read -p "确认继续? (yes/no): " confirm
+if [ "$confirm" != "yes" ]; then
+    log "取消操作"
+    rm -f "$BACKUP_FILE"
+    exit 0
+fi
+
+# 确保本地数据库存在
+log "检查本地数据库..."
+/Applications/Postgres.app/Contents/Versions/16/bin/psql -U $LOCAL_DB_USER -d postgres -tc "SELECT 1 FROM pg_database WHERE datname='$LOCAL_DB_NAME'" | grep -q 1 || \
+    /Applications/Postgres.app/Contents/Versions/16/bin/psql -U $LOCAL_DB_USER -d postgres -c "CREATE DATABASE $LOCAL_DB_NAME;"
+
+# 导入数据
+log "导入数据到本地..."
+/Applications/Postgres.app/Contents/Versions/16/bin/psql -U $LOCAL_DB_USER -d $LOCAL_DB_NAME -f "$BACKUP_FILE" 2>&1 | tail -20
+
+log "导入完成"
+
+# 验证数据
+step "验证数据"
+user_count=$(/Applications/Postgres.app/Contents/Versions/16/bin/psql -U $LOCAL_DB_USER -d $LOCAL_DB_NAME -tc "SELECT COUNT(*) FROM users;")
+app_count=$(/Applications/Postgres.app/Contents/Versions/16/bin/psql -U $LOCAL_DB_USER -d $LOCAL_DB_NAME -tc "SELECT COUNT(*) FROM applications;")
+
+log "用户数: $(echo $user_count | xargs)"
+log "应用数: $(echo $app_count | xargs)"
+
+# 清理备份文件
+read -p "是否删除备份文件? (yes/no): " delete_backup
+if [ "$delete_backup" = "yes" ]; then
+    rm -f "$BACKUP_FILE"
+    log "备份文件已删除"
+else
+    log "备份文件保留在: $BACKUP_FILE"
+fi
+
+echo ""
+echo -e "${GREEN}════════════════════════════════════════${NC}"
+echo -e "${GREEN}  数据库同步完成！${NC}"
+echo -e "${GREEN}  本地数据库: $LOCAL_DB_NAME${NC}"
+echo -e "${GREEN}════════════════════════════════════════${NC}"