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/api/home/route.ts

@@ -1,11 +1,7 @@
-import { and, count, desc, eq, or, sql } from "drizzle-orm";
 import { env } from "@/env";
 import { apiJson } from "@/lib/api";
-import { db, User, WebsiteArticles } from "@/lib/db";
-import { resolveHotelName } from "@/lib/hotel-name";
 import { logger } from "@/lib/logger";
-import { apiCacheKey, cacheSafe } from "@/lib/redis-cache";
-import { cacheNews } from "@/lib/services/news-cache";
+import { cachedHomePayload } from "@/lib/services/home-payload";
 
 /**
  * GET /api/home — combined landing payload: the latest 4 website_articles and
@@ -14,39 +10,7 @@ import { cacheNews } from "@/lib/services/news-cache";
  */
 export async function GET(_req: Request) {
 	try {
-		const data = await cacheNews(apiCacheKey("home"), 15_000, async () => {
-			const [articles, onlineRows, hotelName] = await Promise.all([
-				db
-					.select({
-						id: WebsiteArticles.id,
-						title: WebsiteArticles.title,
-						slug: WebsiteArticles.slug,
-						shortStory: WebsiteArticles.shortStory,
-						image: WebsiteArticles.image,
-						createdAt: WebsiteArticles.createdAt,
-					})
-					.from(WebsiteArticles)
-					.where(
-						and(
-							eq(WebsiteArticles.status, "published"),
-							or(
-								sql`${WebsiteArticles.publishAt} IS NULL`,
-								sql`${WebsiteArticles.publishAt} <= NOW()`,
-							),
-						),
-					)
-					.orderBy(desc(WebsiteArticles.createdAt))
-					.limit(4),
-				db.select({ total: count() }).from(User).where(eq(User.online, "1")),
-				resolveHotelName(),
-			]);
-			return cacheSafe({
-				articles,
-				online: onlineRows[0]?.total ?? 0,
-				hotelName,
-			});
-		});
-		return apiJson(data);
+		return apiJson(await cachedHomePayload());
 	} catch (error) {
 		logger.error("Public news query failed", { module: "news", error });
 		return apiJson(