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/radio/contests/[id]/page.tsx

@@ -3,7 +3,7 @@ import { notFound } from "next/navigation";
 import { ContentCard } from "@/components/public/ui";
 import { prisma } from "@/lib/prisma";
 
-export const dynamic = "force-dynamic";
+export const revalidate = 300;
 
 function formatDate(d: Date | null | undefined): string {
   return d ? d.toISOString().slice(0, 19).replace("T", " ") : "";

src/app/radio/contests/page.tsx

@@ -3,7 +3,7 @@ import Link from "next/link";
 import { ContentCard, EmptyState } from "@/components/public/ui";
 import { prisma } from "@/lib/prisma";
 
-export const dynamic = "force-dynamic";
+export const revalidate = 300;
 
 function formatDate(d: Date | null | undefined): string {
   return d ? d.toISOString().slice(0, 10) : "";

src/app/radio/giveaways/[id]/page.tsx

@@ -3,7 +3,7 @@ import { notFound } from "next/navigation";
 import { ContentCard } from "@/components/public/ui";
 import { prisma } from "@/lib/prisma";
 
-export const dynamic = "force-dynamic";
+export const revalidate = 300;
 
 function formatDate(d: Date | null | undefined): string {
   return d ? d.toISOString().slice(0, 19).replace("T", " ") : "";

src/app/radio/giveaways/page.tsx

@@ -3,7 +3,7 @@ import Link from "next/link";
 import { ContentCard, EmptyState } from "@/components/public/ui";
 import { prisma } from "@/lib/prisma";
 
-export const dynamic = "force-dynamic";
+export const revalidate = 300;
 
 function formatDate(d: Date | null | undefined): string {
   return d ? d.toISOString().slice(0, 10) : "";

src/app/radio/leaderboard/page.tsx

@@ -5,7 +5,7 @@ import { avatarImageUrl } from "@/lib/format";
 import { prisma } from "@/lib/prisma";
 import { siteSettings } from "@/lib/services/site-settings";
 
-export const dynamic = "force-dynamic";
+export const revalidate = 300;
 
 // The radio_listener_points table in the live AtomCMS DB carries user_id +
 // points columns, but the generated Prisma model is a stub (id/timestamps only),

src/app/radio/page.tsx

@@ -5,7 +5,7 @@ import { prisma } from "@/lib/prisma";
 import { siteSettings } from "@/lib/services/site-settings";
 
 // Radio config + today's schedule are read live from the DB / settings table.
-export const dynamic = "force-dynamic";
+export const revalidate = 300;
 
 // Canonical weekday order so today's slots come out chronologically and we can
 // match the current day against whatever casing the `day` column stores.

src/app/radio/schedule/page.tsx

@@ -2,7 +2,7 @@ import { getTranslations } from "next-intl/server";
 import { ContentCard, EmptyState } from "@/components/public/ui";
 import { prisma } from "@/lib/prisma";
 
-export const dynamic = "force-dynamic";
+export const revalidate = 300;
 
 // Weekly order so the table reads Monday → Sunday regardless of insert order.
 // The `day` column stores a free-form string; we key case-insensitively.