Decouple admin from public max-w-7xl via (site) route group.

Public chrome and width live only under (site). /admin and /client inherit the root layout alone, so housekeeping width is no longer tied to the public template.

Co-authored-by: Cursor <[email protected]>

src/app/(site)/guilds/[id]/forum/new/page.tsx

@@ -0,0 +1,97 @@
+import Link from "next/link";
+import { notFound, redirect } from "next/navigation";
+import { getTranslations } from "next-intl/server";
+import { postThread } from "@/actions/social";
+import { ContentCard } from "@/components/public/ui";
+import { auth } from "@/lib/auth";
+import { prisma } from "@/lib/prisma";
+
+export const dynamic = "force-dynamic";
+
+export default async function NewThreadPage({
+	params,
+}: {
+	params: Promise<{ id: string }>;
+}) {
+	const t = await getTranslations("pages.guildForumNew");
+	const { id } = await params;
+	const guildId = Number(id);
+	if (!Number.isInteger(guildId) || guildId <= 0) notFound();
+
+	// Auth gate: only logged-in users may open a thread.
+	const session = await auth();
+	if (!session?.user?.id) redirect("/login");
+
+	// Guild header (read-only). A DB hiccup degrades to notFound rather than 500.
+	let guild: { id: number; name: string } | null = null;
+	try {
+		guild = await prisma.guilds.findUnique({
+			where: { id: guildId },
+			select: { id: true, name: true },
+		});
+	} catch {
+		guild = null;
+	}
+
+	if (!guild) notFound();
+
+	return (
+		<main style={{ display: "grid", gap: "1.5rem" }}>
+			<p style={{ margin: 0 }}>
+				<Link href={`/guilds/${guild.id}/forum`}>{t("backToForum")}</Link>
+			</p>
+
+			<ContentCard
+				icon="✍️"
+				title={t("title")}
+				subtitle={t("subtitle", { guild: guild.name || t("unnamedGuild") })}
+			>
+				<form action={postThread}>
+					{/* Guild target drives the write; the author is taken from the session
+              inside the action, never from this form. */}
+					<input type="hidden" name="guildId" value={String(guild.id)} />
+
+					<label htmlFor="thread-subject" className="muted">
+						{t("subjectLabel")}
+					</label>
+					<input
+						id="thread-subject"
+						name="subject"
+						required
+						maxLength={255}
+						placeholder={t("subjectPlaceholder")}
+						style={{ width: "100%", margin: "0.4rem 0 0.9rem" }}
+					/>
+
+					<label htmlFor="thread-message" className="muted">
+						{t("messageLabel")}
+					</label>
+					<textarea
+						id="thread-message"
+						name="message"
+						required
+						rows={8}
+						placeholder={t("messagePlaceholder")}
+						style={{
+							width: "100%",
+							margin: "0.4rem 0 1rem",
+							resize: "vertical",
+						}}
+					/>
+
+					<div style={{ display: "flex", gap: "0.5rem", alignItems: "center" }}>
+						<button type="submit" className="btn btn-primary">
+							{t("postThread")}
+						</button>
+						<Link
+							href={`/guilds/${guild.id}/forum`}
+							className="btn btn-outline"
+						>
+							{t("cancel")}
+						</Link>
+					</div>
+				</form>
+			</ContentCard>
+		</main>
+	);
+}