feat: adopt Apple UI and four-tab mobile navigation

apps/web/index.html

@@ -2,7 +2,13 @@
 <html lang="zh-CN">
   <head>
     <meta charset="UTF-8" />
-    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <meta
+      name="viewport"
+      content="width=device-width, initial-scale=1.0, viewport-fit=cover, interactive-widget=resizes-content"
+    />
+    <meta name="theme-color" media="(prefers-color-scheme: light)" content="#f5f5f7" />
+    <meta name="theme-color" media="(prefers-color-scheme: dark)" content="#000000" />
+    <meta name="color-scheme" content="light dark" />
     <title>WorthPath · 资产之路</title>
   </head>
   <body>