Keep filters open on wide layouts

static/app.js

@@ -796,8 +796,14 @@
     if (Telemetry.gpc) $("#gpc-note").hidden = false;
     opt.addEventListener("change", () => Telemetry.setOptOut(opt.checked));
     // On phones the rail sits above the results: keep only memory and context open.
+    // Wide layouts hide the toggle, so the section must always be open there
+    // (embedded iframes can start narrow and widen a moment later).
+    const narrow = window.matchMedia("(max-width: 900px)");
     const hasFilters = /[?&](family|size|quant|priority)=/.test(location.search);
-    if (window.matchMedia("(max-width: 900px)").matches && !hasFilters) $("#more-filters").open = false;
+    const syncFilters = () => { if (!narrow.matches) $("#more-filters").open = true; };
+    if (narrow.matches && window.innerWidth > 0 && !hasFilters) $("#more-filters").open = false;
+    narrow.addEventListener("change", syncFilters);
+    window.addEventListener("resize", syncFilters);
     updateBenchCmd();
     loadMeta()
       .then(() => explore())