fix(i18n): PR-P G-31 + G-33 — language audit + /games sunset backdrop

G-31 — language mutation audit pass.
Programmatic sweep for cross-locale character leaks across
lib/locales/{pl,uk,cs,en}.ts + app/ + components/:
  - Slovak-only chars (ô ľ ĺ ŕ) in pl/uk/cs/en
  - Polish-only chars (ą ę ł ń ś ź ż) in uk/cs/en
  - Cyrillic in pl/cs/en
  - Strict Latin diacritics in uk

Findings:
  - pl/uk/cs/en dicts: clean. PL chars in non-pl strings are all
    protected proper nouns (zł, BLIK, Sklepik, Mała elektrownia,
    Sąsiad, Konto dla Młodych, Bezpieczny Kredyt, huta szkła) —
    flagged as intentional per the existing "PL termíny chráněny"
    spec line in cs/uk/en pipeline notes.
  - 1 real leak fixed: `app/dla-szkol/materialy/page.tsx:219`
    "Plně auditovateľné" → "Plně auditovatelné" (the curly L
    `ľ` is Slovak-only; Czech uses `l`).
  - 1 hardcoded PL surface upgraded: `app/verify/page.tsx` (G-14
    expired-token explainer) shipped as PL-only on first cut.
    Now per-locale COPY × 4 langs (pl/uk/cs/en) so a teacher who
    receives the verify email under any locale lands on a
    readable error page when their token expires.
  - `/rodzic/*` pages remain hardcoded PL by design — `/parent/*`
    is the multi-lang counterpart (separate audience-routed
    surfaces). Documented as Pass-11 audit candidate.

G-33 — `/games` CityScene sunset backdrop (user-reported drift).
After PR-P G-27 added `backdrop="sunset"` to the compact
CityScene previews (homepage + dashboard), the FULL-size hero on
/games hub still rendered the legacy night palette — so visiting
the hub felt like jumping to a different product. Set
`backdrop="sunset"` on the /games CityScene call to match the
rest of the app.

Validation:
- pnpm typecheck → 0 errors

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: B2JK-Industry

app/dla-szkol/materialy/page.tsx

@@ -216,7 +216,7 @@ const COPY = {
       "UODO: polský dozorový orgán.",
       "KNF disclaimery na každé stránce s úvěrem.",
       "EU hosting: Upstash Frankfurt + Vercel EU.",
-      "Plně auditovateľné: ledger každé transakce.",
+      "Plně auditovatelné: ledger každé transakce.",
     ],
     ctaTitle: "Kontakt",
     ctaBody:

app/games/page.tsx

@@ -98,7 +98,15 @@ export default async function GamesHubPage() {
           })}
         </p>
       </header>
-      <CityScene games={cityGames} loggedIn={Boolean(session)} aiGames={cityAiGames} />
+      {/* G-33 — same sunset backdrop as homepage + dashboard for visual
+          consistency. PR-P G-27 already added the prop on the compact
+          previews; the full /games hero needed it explicitly too. */}
+      <CityScene
+        games={cityGames}
+        loggedIn={Boolean(session)}
+        aiGames={cityAiGames}
+        backdrop="sunset"
+      />
       <aside className="card p-5 flex flex-col gap-3 text-sm text-[var(--ink-muted)]">
         <h2 className="section-heading text-lg">{t.buildingsMap}</h2>
         <ul className="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-3 gap-x-5 gap-y-1.5">

app/verify/page.tsx

@@ -4,6 +4,7 @@ import {
   consumeTeacherVerification,
 } from "@/lib/teacher-verify";
 import { markTeacherVerified } from "@/lib/class";
+import { getLang } from "@/lib/i18n-server";
 
 /* G-14 — teacher email verification landing.
  *
@@ -16,12 +17,43 @@ import { markTeacherVerified } from "@/lib/class";
  *   - missing token → 308 to /login (link probably mistyped)
  *   - expired/redeemed token → render an explainer with a "request
  *     new link" CTA pointing back at signup
+ *
+ * G-31 — locale-aware error explainer (was hardcoded PL on first
+ * ship). Token consume + redirect path is locale-agnostic so it
+ * doesn't need translation.
  */
 
 type SearchParams = {
   token?: string;
 };
 
+const COPY = {
+  pl: {
+    title: "Link wygasł lub został już użyty",
+    body: "Linki weryfikacyjne działają 24 godziny i tylko raz. Możesz poprosić o nowy z pulpitu nauczyciela albo zarejestrować się jeszcze raz.",
+    dashboard: "Pulpit nauczyciela",
+    signup: "Nowa rejestracja",
+  },
+  uk: {
+    title: "Посилання застаріло або вже було використано",
+    body: "Посилання для верифікації діють 24 години та лише один раз. Запроси нове з панелі вчителя або зареєструйся знову.",
+    dashboard: "Панель вчителя",
+    signup: "Нова реєстрація",
+  },
+  cs: {
+    title: "Odkaz vypršel nebo už byl použit",
+    body: "Verifikační odkazy fungují 24 hodin a pouze jednou. Vyžádej si nový z panelu učitele nebo se zaregistruj znovu.",
+    dashboard: "Panel učitele",
+    signup: "Nová registrace",
+  },
+  en: {
+    title: "Link has expired or was already used",
+    body: "Verification links work for 24 hours and a single use. Request a new one from the teacher dashboard or sign up again.",
+    dashboard: "Teacher dashboard",
+    signup: "New signup",
+  },
+} as const;
+
 export const dynamic = "force-dynamic";
 
 export default async function VerifyPage({
@@ -35,23 +67,21 @@ export default async function VerifyPage({
   }
   const payload = await consumeTeacherVerification(sp.token);
   if (!payload) {
+    const lang = await getLang();
+    const t = COPY[lang];
     return (
       <main className="max-w-xl mx-auto py-12 flex flex-col items-center gap-4 text-center animate-slide-up">
         <span aria-hidden className="text-5xl">
           ⏳
         </span>
-        <h1 className="t-h2 text-[var(--accent)]">Link wygasł lub został już użyty</h1>
-        <p className="text-[var(--ink-muted)] max-w-md">
-          Linki weryfikacyjne działają 24 godziny i tylko raz. Możesz
-          poprosić o nowy z pulpitu nauczyciela albo zarejestrować się
-          jeszcze raz.
-        </p>
+        <h1 className="t-h2 text-[var(--accent)]">{t.title}</h1>
+        <p className="text-[var(--ink-muted)] max-w-md">{t.body}</p>
         <div className="flex flex-wrap gap-3">
           <Link href="/nauczyciel" className="btn btn-primary">
-            Pulpit nauczyciela
+            {t.dashboard}
           </Link>
           <Link href="/nauczyciel/signup" className="btn btn-secondary">
-            Nowa rejestracja
+            {t.signup}
           </Link>
         </div>
       </main>