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/components/auth/auth-page-frame.tsx

@@ -3,9 +3,11 @@ import { AuthTopBar } from "@/components/auth/auth-top-bar";
 import { Reveal } from "@/components/motion-reveal";
 import { UserAvatarThumbnail } from "@/components/shared/user-avatar-thumbnail";
 import { SurfaceCard } from "@/components/surface-card";
+import { loadProfilePrivacyMap } from "@/lib/services/profile-privacy";
 import { ICON_FRIENDS, ICON_NAV_GOODY, ICON_NAV_ME } from "@/lib/site-icons";
 
 export interface PublicUser {
+	id: number;
 	username: string;
 	look: string;
 }
@@ -56,22 +58,28 @@ interface AuthUsersCardsProps {
  * their left column. Cards with no users render nothing, so a cold database
  * degrades to just the intro panel instead of an empty grid.
  */
-export function AuthUsersCards({
+export async function AuthUsersCards({
 	recentUsers,
 	latestUsers,
 	recentTitle,
 	latestTitle,
 }: AuthUsersCardsProps) {
+	// "Hide my online status" must hold outside the profile too — the roster is
+	// exactly where that setting is worth the most.
+	const privacy = await loadProfilePrivacyMap(recentUsers.map((u) => u.id));
+	const onlineUsers = recentUsers.filter(
+		(u) => privacy.get(u.id)?.online !== false,
+	);
 	return (
 		<>
-			{recentUsers.length > 0 && (
+			{onlineUsers.length > 0 && (
 				<SurfaceCard
 					title={recentTitle}
 					icon={ICON_NAV_GOODY}
 					bodyClassName="p-4"
 					className="card-glow"
 				>
-					<AvatarGrid users={recentUsers} online />
+					<AvatarGrid users={onlineUsers} online />
 				</SurfaceCard>
 			)}
 			{latestUsers.length > 0 && (