chore: initial import 萌邮 MengPost (React+Vite + Go+Gin)

Made-with: Cursor

build.sh

@@ -0,0 +1,9 @@
+#!/usr/bin/env bash
+# 构建前端静态产物到 mengpost-frontend/dist
+set -e
+ROOT="$(cd "$(dirname "$0")" && pwd)"
+cd "$ROOT/mengpost-frontend"
+[ -d node_modules ] || npm install
+npm run build
+echo ""
+echo "  前端已构建: $ROOT/mengpost-frontend/dist"