Use per-exchange PWA names and logos for instance app installs.

Show Binance/OKX/Gate 交易系统 with distinct exchange icons in manifests, apple titles, and login branding.

Co-authored-by: Cursor <cursoragent@cursor.com>

lib/instance/templates/index.html

@@ -10,12 +10,12 @@
     <script src="/static/account_risk_badge.js?v=4"></script>
 
     <meta name="theme-color" content="#0b0d14">
-    <meta name="apple-mobile-web-app-title" content="监控">
+    <meta name="apple-mobile-web-app-title" content="{{ pwa_app_name }}">
     <link rel="icon" href="/static/icons/favicon.ico" sizes="32x32">
     <link rel="icon" href="/static/icons/icon.svg" type="image/svg+xml">
     <link rel="apple-touch-icon" href="/static/icons/apple-touch-icon.png">
     <link rel="manifest" href="/static/icons/manifest.webmanifest">
-    <title>{{ exchange_display }} · 加密货币 | 交易监控复盘系统</title>
+    <title>{{ pwa_app_name }}</title>
     <link rel="stylesheet" href="/static/instance_page.css?v=3">
     <link rel="stylesheet" href="/static/instance_theme.css?v=92">