Use absolute coin counts in perp-options points mode.

Treat 2:4 as 2 perp + 4 option coins instead of normalizing to 1:2, and disable embed page caching so hub iframe picks up trade UI updates.

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

lib/common/static/instance_embed.js

@@ -294,6 +294,7 @@
   async function fetchTabHtml(tab) {
     const r = await fetch(embedPageUrl(tab), {
       credentials: "same-origin",
+      cache: "no-store",
       headers: { "X-Instance-Soft-Nav": "1" },
     });
     const ct = (r.headers.get("content-type") || "").toLowerCase();