Add dark mode, i18n, messenger/moderation/verify, admin CRUD parity

Web-tier features completing the AtomCMS→Next.js conversion (slice 2):

UI/UX:
- Dark mode: html.dark CSS-var overrides + ThemeSwitcher (localStorage,
  no-flash boot script) wired into the nav.
- i18n (next-intl, cookie-based / no URL routing): en + it catalogs,
  request.ts, provider in root layout, LanguageSwitcher; shell (nav,
  header, footer) fully translated. URLs + access-guard unchanged.
- globals.css: --muted/--border aliases used across admin pages.

User features:
- /messages: offline messages + friend-request accept (server action
  re-reads session, two directional rows, idempotent).
- Email verification: signed-token /verify route + sendVerification wired
  into register (best-effort, never blocks signup).
- Article reactions: toggle UI on news/[slug] + server action.
- Content moderation service (website_wordfilter + optional OpenAI
  moderations, fail-open) wired into article comments + guestbook.

Admin CRUD parity (Filament replacement):
- /admin/shop (+ new/[id]) packages CRUD + read-only orders.
- /admin/transactions read-only PayPal log.
- /admin/permissions, /admin/tags, /admin/ads (+ new/[id]),
  /admin/help-questions (+ new/[id]), /admin/radio/history,
  /admin/users/[id]/edit. All gated by requireStaff + logStaffActivity.

Verified: tsc 0, vitest 48/48, next build 0 (all routes incl. new
admin CRUD + /messages + /verify).

src/components/language-switcher.tsx

@@ -0,0 +1,45 @@
+"use client";
+
+import { useLocale } from "next-intl";
+import { useRouter } from "next/navigation";
+import { useTransition } from "react";
+
+const LOCALES: { code: string; label: string }[] = [
+  { code: "en", label: "EN" },
+  { code: "it", label: "IT" },
+];
+
+/**
+ * Locale picker. Writes the chosen locale to the `NEXT_LOCALE` cookie (read by
+ * src/i18n/request.ts on the server) and refreshes the route so server
+ * components re-render with the new messages. No URL change — matches the
+ * cookie-based, routing-free i18n setup.
+ */
+export function LanguageSwitcher() {
+  const locale = useLocale();
+  const router = useRouter();
+  const [pending, startTransition] = useTransition();
+
+  function onChange(e: React.ChangeEvent<HTMLSelectElement>) {
+    const next = e.target.value;
+    document.cookie = `NEXT_LOCALE=${next};path=/;max-age=31536000;samesite=lax`;
+    startTransition(() => router.refresh());
+  }
+
+  return (
+    <select
+      value={locale}
+      onChange={onChange}
+      disabled={pending}
+      aria-label="Language"
+      className="nav-item cursor-pointer bg-transparent text-[13px]"
+      style={{ border: "none", padding: "0 0.25rem" }}
+    >
+      {LOCALES.map((l) => (
+        <option key={l.code} value={l.code}>
+          {l.label}
+        </option>
+      ))}
+    </select>
+  );
+}

src/components/navigation.tsx

@@ -1,8 +1,12 @@
+import { getTranslations } from "next-intl/server";
 import Link from "next/link";
 import { auth } from "@/lib/auth";
+import { LanguageSwitcher } from "@/components/language-switcher";
+import { ThemeSwitcher } from "@/components/theme-switcher";
 
 export async function Navigation() {
   const session = await auth();
+  const t = await getTranslations("nav");
   const isStaff = (session?.user?.rank ?? 0) >= 7;
 
   return (
@@ -10,87 +14,96 @@ export async function Navigation() {
       <div className="max-w-7xl min-h-[60px] px-4 flex items-center gap-x-6 md:gap-x-8 mx-auto flex-wrap">
         <Link href="/" className="nav-item">
           <i className="navigation-icon home mr-1 hidden lg:inline-flex" />
-          Home
+          {t("home")}
         </Link>
 
         <details className="relative">
           <summary className="nav-item list-none cursor-pointer [&::-webkit-details-marker]:hidden">
             <i className="navigation-icon community mr-1 hidden lg:inline-flex" />
-            Community
+            {t("community")}
           </summary>
           <div
             className="absolute left-0 mt-1 min-w-[190px] rounded-md shadow-lg z-50 py-1"
             style={{ backgroundColor: "var(--color-dropdown)" }}
           >
             <Link href="/news" className="dropdown-item">
-              Articles
+              {t("articles")}
             </Link>
             <Link href="/photos" className="dropdown-item">
-              Photos
+              {t("photos")}
             </Link>
             <Link href="/staff" className="dropdown-item">
-              Staff
+              {t("staff")}
             </Link>
             <Link href="/rankings" className="dropdown-item">
-              Rankings
+              {t("rankings")}
             </Link>
             <Link href="/guilds" className="dropdown-item">
-              Guilds
+              {t("guilds")}
             </Link>
           </div>
         </details>
 
         <Link href="/leaderboard" className="nav-item">
           <i className="navigation-icon leaderboards mr-1 hidden lg:inline-flex" />
-          Leaderboards
+          {t("leaderboards")}
         </Link>
         <Link href="/rares" className="nav-item">
-          Rare values
+          {t("rareValues")}
         </Link>
         <Link href="/shop" className="nav-item">
           <i className="navigation-icon shop mr-1 hidden lg:inline-flex" />
-          Shop
+          {t("shop")}
         </Link>
         <Link href="/marketplace" className="nav-item">
-          Market
+          {t("market")}
         </Link>
 
         <details className="relative">
           <summary className="nav-item list-none cursor-pointer [&::-webkit-details-marker]:hidden">
             <i className="navigation-icon rules mr-1 hidden lg:inline-flex" />
-            Assistance
+            {t("assistance")}
           </summary>
           <div
             className="absolute left-0 mt-1 min-w-[190px] rounded-md shadow-lg z-50 py-1"
             style={{ backgroundColor: "var(--color-dropdown)" }}
           >
             <Link href="/help" className="dropdown-item">
-              Help center
+              {t("helpCenter")}
             </Link>
             {session?.user ? (
               <Link href="/help/tickets" className="dropdown-item">
-                My tickets
+                {t("myTickets")}
               </Link>
             ) : null}
             <Link href="/badges" className="dropdown-item">
-              Badges
+              {t("badges")}
             </Link>
           </div>
         </details>
 
         <Link href="/radio" className="nav-item">
-          Radio
+          {t("radio")}
         </Link>
         {session?.user ? (
           <Link href="/friends" className="nav-item">
-            Friends
+            {t("friends")}
+          </Link>
+        ) : null}
+        {session?.user ? (
+          <Link href="/messages" className="nav-item">
+            {t("messages")}
           </Link>
         ) : null}
         {isStaff ? (
           <Link href="/admin" className="nav-item">
-            Admin
+            {t("admin")}
           </Link>
         ) : null}
+        <div className="ml-auto flex items-center gap-x-2">
+          <LanguageSwitcher />
+          <ThemeSwitcher />
+        </div>
       </div>
     </nav>
   );

src/components/site-footer.tsx

@@ -1,8 +1,10 @@
+import { getTranslations } from "next-intl/server";
 import { siteSettings } from "@/lib/services/site-settings";
 
 export async function SiteFooter() {
   const hotelName = await siteSettings.get("hotel_name", "Atom");
   const year = new Date().getFullYear();
+  const t = await getTranslations("footer");
 
   return (
     <footer
@@ -10,7 +12,7 @@ export async function SiteFooter() {
       style={{ backgroundColor: "var(--color-surface)", color: "var(--color-text-muted)" }}
     >
       <div className="md:font-semibold text-[12px] md:text-[14px]">
-        © {year} - {hotelName} is a not for profit educational project
+        {t("copyright", { year, hotel: hotelName ?? "Atom" })}
       </div>
     </footer>
   );

src/components/site-header.tsx

@@ -1,9 +1,11 @@
+import { getTranslations } from "next-intl/server";
 import Link from "next/link";
 import { auth } from "@/lib/auth";
 import { prisma } from "@/lib/prisma";
 import { siteSettings } from "@/lib/services/site-settings";
 
 export async function SiteHeader() {
+  const t = await getTranslations("header");
   const [session, hotelName, header, logo] = await Promise.all([
     auth(),
     siteSettings.get("hotel_name", "Atom"),
@@ -50,7 +52,7 @@ export async function SiteHeader() {
                 style={{ backgroundColor: "var(--color-surface)" }}
               />
               <span className="relative">
-                {online} {hotelName} online
+                {t("online", { count: online, hotel: hotelName ?? "Atom" })}
               </span>
             </div>
           </div>
@@ -66,7 +68,7 @@ export async function SiteHeader() {
                   borderColor: "rgba(255,255,255,0.3)",
                 }}
               >
-                Nitro client
+                {t("nitroClient")}
               </button>
             </Link>
           </div>
@@ -77,10 +79,7 @@ export async function SiteHeader() {
             className="font-semibold flex flex-col items-center md:w-[600px]"
             style={{ color: "#ffffff", textShadow: "0 1px 4px rgba(0,0,0,0.7)" }}
           >
-            <p className="hidden text-center text-xl md:block">
-              An online virtual world where you can create your own avatar, make friends, chat,
-              create rooms and much more!
-            </p>
+            <p className="hidden text-center text-xl md:block">{t("tagline")}</p>
             <div className="flex flex-col items-center justify-center gap-x-6 gap-y-4 md:mt-6 md:flex-row md:gap-y-0">
               <Link href="/login">
                 <button
@@ -92,17 +91,17 @@ export async function SiteHeader() {
                     color: "var(--button-text-color)",
                   }}
                 >
-                  Login
+                  {t("login")}
                 </button>
               </Link>
-              <p className="text-sm uppercase">Or</p>
+              <p className="text-sm uppercase">{t("or")}</p>
               <Link href="/register">
                 <button
                   type="button"
                   className="uppercase px-8 py-2.5 rounded-full transition ease-in-out duration-200"
                   style={{ backgroundColor: "var(--color-accent)", color: "#ffffff" }}
                 >
-                  Create an account
+                  {t("createAccount")}
                 </button>
               </Link>
             </div>

src/components/theme-switcher.tsx

@@ -0,0 +1,42 @@
+"use client";
+
+import { useEffect, useState } from "react";
+
+/**
+ * Light/dark toggle. The actual class lives on <html> (so `.app.dark` selectors
+ * and the dark CSS-var block apply); we mirror localStorage so the choice
+ * survives reloads. The inline boot script in the root layout applies the saved
+ * theme before paint to avoid a flash — this component only reflects/toggles it.
+ */
+export function ThemeSwitcher() {
+  const [dark, setDark] = useState(false);
+
+  useEffect(() => {
+    setDark(document.documentElement.classList.contains("dark"));
+  }, []);
+
+  function toggle() {
+    const next = !dark;
+    setDark(next);
+    document.documentElement.classList.toggle("dark", next);
+    try {
+      localStorage.setItem("theme", next ? "dark" : "light");
+    } catch {
+      /* private mode / storage disabled — runtime toggle still works */
+    }
+  }
+
+  return (
+    <button
+      type="button"
+      onClick={toggle}
+      className="nav-item cursor-pointer"
+      aria-label={dark ? "Switch to light mode" : "Switch to dark mode"}
+      title={dark ? "Light mode" : "Dark mode"}
+    >
+      <span aria-hidden className="text-lg leading-none">
+        {dark ? "☀" : "☾"}
+      </span>
+    </button>
+  );
+}