fix(util&scss): 修复快应用内嵌H5滚动问题并优化URL参数处理

1. 为body添加滚动样式适配快应用webview视口限制
2. 调整URL参数合并逻辑，确保page_params始终置于URL末尾

common/js/util.js

@@ -721,7 +721,13 @@ export default {
 		}
 
 		// 2. 合并 param:同 key 时新值覆盖旧值,杜绝 ?name=A&name=B 这种重复
-		const merged = Object.assign({}, existingParams, param || {});
+		//    page_params 永远放在 URL 最末:从 param 中抽离后追加到 merged 末尾
+		const safeParam = param || {};
+		const { page_params, ...restParam } = safeParam;
+		const merged = Object.assign({}, existingParams, restParam);
+		if (page_params !== undefined) {
+			merged.page_params = page_params;
+		}
 
 		// 3. 参数编码策略,按平台区分:
 		//    - 小程序/App: uni.navigateTo / router.pushUrl 内部会自动对 url 做一次编码,