Store Finder enhancments

A few enhancements for the store finder functionality. Will continue updating this issue as early adopter feedback is gathered.

* Make search bar wider/longer, ideally percentage based to fill most of the width of the map on any device size. With current size, autocomplete suggestions are not clearly visible.
* "Near me" button should have some kind of feedback while polling location, perhaps a spinner, as sometimes it can take several seconds to poll location. And ideally, it would populate the search box with the found location for further user confirmation.
* Zoom bounds. When searching for a specific address or zip code, the map is zoomed in very far which can be deceiving if there are no results. Perhaps when querying a location, a max zoom should be implemented to prevent the map from zooming in too far after finding a location.
* Change default search box text to "search by city, address, or zip code"

未指定文件、测试或入口点；请先定位门店查找器 UI 及其搜索、位置和地图行为。完成的标准是实现所请求的四项增强功能：更宽的响应式搜索栏、针对“附近”的反馈和确认、位置搜索后的最大缩放级别，以及指定的默认文本。

由索引模型根据 Issue 内容生成。