feat: harden atoms-nexst against review findings (37 items)

Second review pass covering security, performance, admin tooling and the
public/room flows. All HIGH and MEDIUM findings from the audit are resolved;
nothing in this commit changes the visible feature set.

Authentication & session security
- CSP is now set on the request headers in the proxy, which is what Next.js
  uses to derive the render nonce, so the nonce is effective.
- 2FA: an already-enabled user cannot re-enroll, the setup endpoint is
  rate-limited per account, and confirmed codes are persisted so the second
  secret no longer silently never applies.
- Password reset revokes the ticket, authTicket and all personal access
  tokens, and bumps the token version so existing sessions die. The same
  revocation is now wired into the staff-side password reset.
- /reset and /verify return a stable error code instead of raw text; the
  mail lookups are ordered by id so duplicates cannot vary between runs.
- Resending the verification mail gets a per-address cooldown on top of the
  per-user limit.
- Issue API tokens with the narrower radio/ticket ability set instead of "*".

Authorization & input handling
- Mid-rank staff can no longer keep dynamically granted non-view admin.*
  permissions: existing grants are revoked by migration and the grant lookup
  is restricted to "%.view". Rank guards use the dynamic super-admin check.
- Alerting a user is permission-checked and audited like the other tools.
- Material mutations (giveCredits/giveDuckets/giveDiamonds, the admin user
  actions route, bulk user actions) are capped and rank-guarded, and bulk
  ids are bounded.
- updateRoom / updateRoomItem write through a field allowlist, and items
  may only be edited through their own room.
- Classnames reaching the filesystem are validated before use so a crafted
  value cannot escape the asset directories.
- The word filter now also covers offline mails, guild forum threads and
  replies, and user mottos.
- Media uploads are validated by magic bytes, /api/media requires the page
  edit permission, APP_URL must be configured once mail is enabled, and the
  diagnostics error route checks the fetch site header.

Admin tooling
- Secret settings render masked and cannot be overwritten with a blank or
  an arbitrary raw key; radio credentials are new password inputs.
- Commandocentrum balance changes are audited.
- Admin list pagination reads the caller's per-page instead of the max, and
  the log exporter caps offset and search length.

Performance
- Catalog translations are cached per module, with a cheap revision hash;
  the public online count uses a stale window instead of hammering the DB.
- The cache warmup now primes the payload the home route actually reads.
- TopHeader batches its queries into one round trip, and LCP avatars load
  eagerly.
- motion/react and sonner are no longer part of the root layout; the nav
  dropdown and mobile nav panels are lazy client chunks. Anonymous visitors
  again get the navigation chrome, and public pages get an edge cacheable
  response.

Accessibility
- Nested <main> elements in phase pages became <section>; the page entrance
  and route progress animations are pure CSS that respect reduced motion.

src/app/(site)/photos/page.tsx

@@ -10,6 +10,7 @@ import { ContentCard, EmptyState } from "@/components/public/ui";
 import { cached } from "@/lib/cache";
 import { CameraWeb, db } from "@/lib/db";
 import { formatDate } from "@/lib/format-date";
+import { loadProfilePrivacyMap } from "@/lib/services/profile-privacy";
 import { publicReadFailure } from "@/lib/services/public-read";
 
 export async function generateMetadata(): Promise<Metadata> {
@@ -53,9 +54,16 @@ export default async function PhotosPage() {
 		photos = publicReadFailure("photos")(error);
 	}
 
+	// Users can hide their photos everywhere, not only on their profile.
+	const photoOwners = [...new Set((photos ?? []).map((p) => p.userId))];
+	const photoPrivacy = await loadProfilePrivacyMap(photoOwners);
+	const visiblePhotos = (photos ?? []).filter(
+		(p) => photoPrivacy.get(p.userId)?.photos !== false,
+	);
+
 	// Pre-shape for the client lightbox: translate captions server-side so the
 	// client component stays free of i18n/db dependencies.
-	const items: LightboxPhoto[] = (photos ?? []).map((p) => ({
+	const items: LightboxPhoto[] = visiblePhotos.map((p) => ({
 		id: String(p.id),
 		url: p.url,
 		alt: t("photoAlt", { id: p.userId }),
@@ -64,7 +72,7 @@ export default async function PhotosPage() {
 	}));
 
 	return (
-		<main className="page-grid">
+		<section className="page-grid">
 			<ContentCard icon="📸" title={t("title")} subtitle={t("subtitle")} />
 
 			<ContentCard padded={items.length === 0}>
@@ -76,6 +84,6 @@ export default async function PhotosPage() {
 					<PhotoLightbox photos={items} />
 				)}
 			</ContentCard>
-		</main>
+		</section>
 	);
 }