fix(h5): 小程序 WebView 刘海区背景与顶栏安全区

Logo 下移 safe-area、embed 隐藏 HTML 标题；暖色渐变铺满刘海，页面背景上延与全屏洗底层对齐。

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

apps/user-h5/src/pages/HomePage.vue

@@ -48,14 +48,11 @@ const {
 .home {
   position: relative;
   overflow-x: hidden;
-  padding-top: 48px;
+  margin-top: calc(-1 * var(--yxg-safe-top));
+  padding-top: var(--yxg-page-top);
   padding-bottom: var(--spacing-xs);
-  min-height: 100%;
-  background:
-    radial-gradient(110% 70% at 85% -8%, rgba(255, 190, 170, 0.65) 0%, transparent 52%),
-    radial-gradient(90% 55% at 8% 6%, rgba(255, 220, 200, 0.75) 0%, transparent 48%),
-    radial-gradient(60% 40% at 50% 0%, rgba(255, 255, 255, 0.55) 0%, transparent 60%),
-    linear-gradient(180deg, var(--color-bg-start) 0%, #ffe4d8 28%, #fff4ef 52%, var(--color-bg-sheet) 100%);
+  min-height: calc(100% + var(--yxg-safe-top));
+  background: var(--yxg-page-wash);
 }
 .atm {
   position: absolute;