since3-portal/app/(templates)/preview/[key]/page.tsx

import type { Metadata } from "next"
import { notFound, redirect } from "next/navigation"
import { verifySession } from "@/lib/supabase/dal"
import { resolveContent } from "@/modules/templates/lib/content"
import { getTemplate } from "@/modules/templates/lib/registry"
import { getVariant } from "@/modules/templates/queries/variants"
import { LivePreview } from "@/modules/templates/ui/components/live-preview"
import { TemplateRenderer } from "@/modules/templates/ui/components/template-renderer"

export const metadata: Metadata = {
    title: "Vorschau",
    robots: { index: false, follow: false },
}

// Interne Vorschau für Admins: Grundvorlage, gespeicherte Variante (?variant=) oder Live-Modus für den Editor (?live=1)
export default async function TemplatePreviewPage({ params, searchParams }: PageProps<"/preview/[key]">) {
    const session = await verifySession()
    if (!session.isAdmin) redirect("/client/dashboard")

    const { key } = await params
    const { variant: variantId, live } = await searchParams
    const def = getTemplate(key)
    if (!def) notFound()

    let raw: unknown = {}
    if (typeof variantId === "string") {
        const variant = await getVariant(variantId)
        if (!variant || variant.template_key !== def.key) notFound()
        raw = variant.content
    }

    const content = resolveContent(def, raw)
    // KI-Chat und -Demos brauchen eine gespeicherte Variante als Wissensquelle
    const access = typeof variantId === "string" ? { variantId } : null

    return live === "1"
        ? <LivePreview templateKey={def.key} initialContent={content} access={access} />
        : <TemplateRenderer templateKey={def.key} content={content} access={access} />
}