feat: shop buy, forum replies, tickets, messages, sessions, and UX hardening

Complete remaining product gaps: credit-based shop purchases, guild thread replies, help ticket detail/reply/close, offline message compose, sign-out-everywhere via JWT version, ads delete confirm, soft-fail feedback, rate limits, loading states, and single auth() in site layout.

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

src/app/(site)/news/[slug]/page.tsx

@@ -16,7 +16,7 @@ import { sanitize } from "@/lib/sanitize";
 
 export const revalidate = 60;
 
-type SearchParams = Promise<{ comment?: string; error?: string }>;
+type SearchParams = Promise<{ comment?: string; reaction?: string; error?: string }>;
 
 function feedbackStyle(tone: "success" | "error"): CSSProperties {
 	const accent =
@@ -87,7 +87,7 @@ export default async function ArticlePage({
 	searchParams: SearchParams;
 }) {
 	const { slug } = await params;
-	const { comment, error } = await searchParams;
+	const { comment, reaction, error } = await searchParams;
 	const t = await getTranslations("pages.article");
 
 	const article = await cacheQuery(
@@ -189,6 +189,11 @@ export default async function ArticlePage({
 					{t("success.posted")}
 				</div>
 			) : null}
+			{reaction === "1" ? (
+				<div role="status" style={feedbackStyle("success")}>
+					{t("success.reaction")}
+				</div>
+			) : null}
 			{errorMessage ? (
 				<div role="alert" style={feedbackStyle("error")}>
 					{errorMessage}
@@ -240,6 +245,7 @@ export default async function ArticlePage({
 										name="articleId"
 										value={String(articleId)}
 									/>
+									<input type="hidden" name="slug" value={article.slug} />
 									<input type="hidden" name="reaction" value={r.key} />
 									<button
 										type="submit"