refactor(ui): replace modal dialogs with toast/sheet components

Remove DialogVant/NotifyVant and add Toast and Sheet components with
useToast, useReveal, and usePageTransition composables. Rework
Navigation, RegisterView, and styles across both apps; rebuild dist assets.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

apps/user-app/index.html

@@ -5,8 +5,8 @@
     <meta charset="UTF-8" />
     <meta name="apple-mobile-web-app-capable" content="yes" />
     <meta name="apple-mobile-web-app-status-bar-style" content="black-translucent" />
-    <meta name="theme-color" content="#1C2D56" />
-    <meta name="background-color" content="#1C2D56" />
+    <meta name="theme-color" content="#23493c" />
+    <meta name="background-color" content="#23493c" />
     <meta content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no" name="viewport" />
     <title>طلای منتزر</title>
   </head>