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>

crypto_monitor_binance/static/icons/icon.svg

@@ -1,17 +1,6 @@
 <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512">
-  <defs>
-    <linearGradient id="g" x1="0" y1="0" x2="1" y2="1">
-      <stop offset="0%" stop-color="#22d3ee"/>
-      <stop offset="100%" stop-color="#34d399"/>
-    </linearGradient>
-  </defs>
   <rect width="512" height="512" rx="108" fill="#0c1019"/>
   <rect x="36" y="36" width="440" height="440" rx="88" fill="#141b2d"/>
-  <rect x="36" y="36" width="440" height="440" rx="88" fill="none" stroke="url(#g)" stroke-width="12"/>
-  <path d="M120 320 L200 248 L280 272 L392 168" fill="none" stroke="url(#g)" stroke-width="20" stroke-linecap="round" stroke-linejoin="round"/>
-  <circle cx="392" cy="168" r="18" fill="#34d399"/>
-  <rect x="168" y="268" width="28" height="64" rx="6" fill="#f87171"/>
-  <line x1="182" y1="248" x2="182" y2="340" stroke="#f87171" stroke-width="10" stroke-linecap="round"/>
-  <rect x="268" y="220" width="28" height="96" rx="6" fill="#34d399"/>
-  <line x1="282" y1="200" x2="282" y2="340" stroke="#34d399" stroke-width="10" stroke-linecap="round"/>
+  <rect x="36" y="36" width="440" height="440" rx="88" fill="none" stroke="#F0B90B" stroke-width="12"/>
+  <polygon points="256,150 362,256 256,362 150,256" fill="#F0B90B"/><polygon points="256,210 302,256 256,302 210,256" fill="#1a160a"/>
 </svg>