feat: 视频发布导入 API(uploads+site_assets)；首页视频先拉 routes 与 VITE_DEFAULT_SITE_ID 回退

Made-with: Cursor

scripts/import-promotion-to-api.sh

@@ -0,0 +1,12 @@
+#!/usr/bin/env bash
+# 将 web/promotion/视频发布 导入到 data/uploads + MongoDB site_assets（无需后台手动上传）
+# 依赖：server/.env 中 MONGODB_URI、MONGODB_DB（与 API 一致）；本机可连 Mongo
+#
+# 用法：
+#   ./scripts/import-promotion-to-api.sh -site=你的站点MongoID
+#   ./scripts/import-promotion-to-api.sh -site=xxx -src=/www/yh_web/web/promotion/视频发布 -upload=/www/yh_web/data/uploads
+#   ./scripts/import-promotion-to-api.sh -site=xxx -dry-run
+set -euo pipefail
+ROOT="$(cd "$(dirname "$0")/.." && pwd)"
+cd "$ROOT/server"
+exec go run -mod=vendor ./cmd/promotion-import/ "$@"