completely refactored utilities for direct rendering, killed iframes

components/portal/BuyingGuideSwitcher.tsx

@@ -0,0 +1,60 @@
+"use client";
+
+import { useMemo } from "react";
+import { useSearchParams, useRouter } from "next/navigation";
+import dynamic from "next/dynamic";
+import { cn } from "@/lib/utils";
+
+// these should already exist under components/buying-guide/*
+const BuyingGuideList = dynamic(
+    () => import("@/components/buying-guide/BuyingGuideList"),
+                                { ssr: false }
+);
+const LaserFinderPanel = dynamic(
+    () => import("@/components/buying-guide/LaserFinderPanel"),
+                                 { ssr: false }
+);
+
+const TABS = [
+    { key: "list", label: "Guide" },
+{ key: "finder", label: "Laser Finder" },
+] as const;
+
+export default function BuyingGuideSwitcher() {
+    const sp = useSearchParams();
+    const router = useRouter();
+
+    const active = useMemo(() => {
+        const t = (sp.get("bg") || TABS[0].key).toLowerCase();
+        return TABS.some(x => x.key === t) ? t : TABS[0].key;
+    }, [sp]);
+
+    function setTab(k: string) {
+        const q = new URLSearchParams(sp.toString());
+        q.set("bg", k);
+        router.replace(`/portal/buying-guide?${q.toString()}`, { scroll: false });
+    }
+
+    return (
+        <div className="space-y-4">
+        <div className="flex gap-2">
+        {TABS.map(t => (
+            <button
+            key={t.key}
+            onClick={() => setTab(t.key)}
+            className={cn(
+                "rounded-md border px-3 py-1.5 text-sm",
+                active === t.key ? "bg-primary text-primary-foreground" : "hover:bg-muted"
+            )}
+            >
+            {t.label}
+            </button>
+        ))}
+        </div>
+
+        <div className="rounded-md border p-4">
+        {active === "finder" ? <LaserFinderPanel /> : <BuyingGuideList />}
+        </div>
+        </div>
+    );
+}