style: 完成前端专业金融风格优化

- 主题配色: 黑金传奇(暗) + 白金殿堂(亮)
- 底部导航: 去掉毛玻璃，简洁专业
- 交易页面: 明亮模式颜色优化，实心按钮
- 按钮圆角: xxl(24px) → lg(12px)/md(8px)
- 字体系统: Inter(币安同款)
- 整体风格: 专业金融科技

flutter_monisuo/build/web/flutter_bootstrap.js

@@ -37,6 +37,6 @@ _flutter.buildConfig = {"engineRevision":"e4b8dca3f1b4ede4c30371002441c88c12187e
 
 _flutter.loader.load({
   serviceWorkerSettings: {
-    serviceWorkerVersion: "2749146521" /* Flutter's service worker is deprecated and will be removed in a future Flutter release. */
+    serviceWorkerVersion: "2301510877" /* Flutter's service worker is deprecated and will be removed in a future Flutter release. */
   }
 });