feat(h5): 小程序原生顶栏 + 本地联调与一键部署

nh=1 隐藏 H5 顶栏并由 cover 承载 logo；H5 仅 4px 顶距避免重复留白。新增 dev:mp、deploy:h5 与联调文档。

Co-authored-by: Cursor <cursoragent@cursor.com>

package.json

@@ -9,7 +9,9 @@
   ],
   "scripts": {
     "dev:h5": "npm run dev -w @yuxingu/user-h5",
+    "dev:mp": "bash scripts/dev-mp-h5.sh",
     "build:h5": "npm run build -w @yuxingu/user-h5",
+    "deploy:h5": "bash scripts/deploy-h5.sh",
     "dev:admin": "npm run dev -w @yuxingu/admin-h5",
     "build:admin": "npm run build -w @yuxingu/admin-h5",
     "dev:api": "cd apps/api && go run ./cmd/server",