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>

apps/user-h5/src/router/index.ts

@@ -57,8 +57,12 @@ router.beforeEach((to) => {
     q.mp = '1'
     changed = true
   }
+  if (sessionStorage.getItem('yxg_mp_native_header') === '1' && q.nh !== '1') {
+    q.nh = '1'
+    changed = true
+  }
   const storedSbh = sessionStorage.getItem('yxg_sbh')
-  if (storedSbh && q.sbh !== storedSbh) {
+  if (storedSbh && q.sbh !== storedSbh && q.nh !== '1') {
     q.sbh = storedSbh
     changed = true
   }