Performance, SEO, a11y, and code quality improvements

1. Performance: 25 pages switched from force-dynamic to revalidate=300 (ISR);
   2 pages (community, developers) now fully static (SSG)
2. DB indexes: Added @@index on foreign keys for WebsiteArticles,
   WebsiteArticleReactions, WebsiteArticleComments, WebsiteHelpCenterTickets,
   WebsiteShopArticles, RadioSongRequests, StaffActivities
3. SEO: Added robots.ts, sitemap.ts, canonical URLs, Open Graph + Twitter
   Card metadata on root layout and news articles
4. A11Y: Replaced <details>/<summary> dropdowns with accessible button-based
   NavDropdown (aria-expanded, aria-haspopup, role=menu). MobileNav now
   uses translated aria-label, aria-expanded, aria-controls, role=menu
5. Code quality: Added try/catch to updateArticle/deleteArticle; deleteArticle
   now uses prisma. for atomicity
6. CI/CD: Added GitHub Actions workflow (typecheck + test)
7. i18n: Added openMenu/closeMenu keys to all 6 locales
8. Observability: Health endpoint now checks SMTP reachability when configured
9. Loading states: Added loading.tsx for root, admin, and news sections
10. Word filter cache: Added 60s TTL auto-refresh instead of manual cache bust

src/app/sitemap.ts

@@ -0,0 +1,56 @@
+import type { MetadataRoute } from "next";
+import { prisma } from "@/lib/prisma";
+
+export default async function sitemap(): Promise<MetadataRoute.Sitemap> {
+  const appUrl = process.env.APP_URL ?? "http://localhost:3000";
+
+  // Static pages
+  const staticPages = [
+    { url: appUrl, lastModified: new Date(), changeFrequency: "hourly" as const, priority: 1 },
+    { url: `${appUrl}/news`, lastModified: new Date(), changeFrequency: "hourly" as const, priority: 0.9 },
+    { url: `${appUrl}/community`, lastModified: new Date(), changeFrequency: "daily" as const, priority: 0.7 },
+    { url: `${appUrl}/shop`, lastModified: new Date(), changeFrequency: "daily" as const, priority: 0.8 },
+    { url: `${appUrl}/leaderboard`, lastModified: new Date(), changeFrequency: "daily" as const, priority: 0.6 },
+    { url: `${appUrl}/rankings`, lastModified: new Date(), changeFrequency: "daily" as const, priority: 0.6 },
+    { url: `${appUrl}/staff`, lastModified: new Date(), changeFrequency: "weekly" as const, priority: 0.5 },
+    { url: `${appUrl}/help`, lastModified: new Date(), changeFrequency: "weekly" as const, priority: 0.5 },
+    { url: `${appUrl}/badges`, lastModified: new Date(), changeFrequency: "weekly" as const, priority: 0.4 },
+    { url: `${appUrl}/radio`, lastModified: new Date(), changeFrequency: "daily" as const, priority: 0.7 },
+  ];
+
+  // News articles
+  let articles: { slug: string; updatedAt: Date | null }[] = [];
+  try {
+    articles = await prisma.websiteArticles.findMany({
+      select: { slug: true, updatedAt: true },
+      orderBy: { createdAt: "desc" },
+      take: 200,
+    });
+  } catch { /* empty */ }
+
+  const articlePages = articles.map((a) => ({
+    url: `${appUrl}/news/${a.slug}`,
+    lastModified: a.updatedAt ?? new Date(),
+    changeFrequency: "monthly" as const,
+    priority: 0.6,
+  }));
+
+  // Guilds
+  let guildIds: number[] = [];
+  try {
+    const rows = await prisma.guilds.findMany({
+      select: { id: true },
+      take: 200,
+    });
+    guildIds = rows.map((r) => Number(r.id));
+  } catch { /* empty */ }
+
+  const guildPages = guildIds.map((id) => ({
+    url: `${appUrl}/guilds/${id}`,
+    lastModified: new Date(),
+    changeFrequency: "daily" as const,
+    priority: 0.5,
+  }));
+
+  return [...staticPages, ...articlePages, ...guildPages];
+}