refactor: full codebase overhaul — dead code removal, env validation, logger migration, date consolidation, Prisma schema cleanup, button consistency, useEffect deps, test coverage

- env.ts: added 10 missing Zod-validated env vars (imager, paypal currency, argon2/bcrypt params)
- Migrated 6 modules from process.env to validated env.* (auth, proxy-auth, paypal, password, redis, imager, moderation, alert, logger)
- Replaced console.warn/error with pino logger in 9 server-side modules
- Removed 50+ dead exports (SWF wrappers, coalesceHotelName, signIn, isStaff re-export, formatTimestamp, Skeleton/SkeletonCard, 4 unused housekeeping sections)
- Consolidated date formatting: 28 files migrated to shared formatDate() from @/lib/format-date
- Wired 4 radio/settings API routes through cached siteSettings service instead of raw Prisma queries
- Added getMany()/getAll() helpers to SiteSettings service
- Removed 88 dead Prisma model definitions (schema 2763→1846 lines)
- Created admin action-helper.ts with wrapAction() for standardized error handling
- Fixed useEffect dependency arrays in 4 data-heavy components
- Replaced raw btn CSS classes with shadcn Button component across admin pages
- Stripped dead i18n namespaces (common, pages.client) from all 22 translation files
- Removed 2 dead scripts (create-release.sh, check-local-imports.ts)
- Fixed knip.json configuration
- Added 7 new test suites: format-date, paypal, moderation, alert, webhook, action-helper, and fixed password.test.ts for env mocking
- All 358 tests passing across 72 test files
- TypeScript: 0 errors

src/app/(site)/u/[username]/page.tsx

@@ -67,10 +67,7 @@ const BADGE_IMG_BASE = "https://images.habbo.com/c_images/album1584";
 const CURRENCY_DUCKETS = 0;
 const CURRENCY_DIAMONDS = 5;
 
-function formatTimestamp(ts: number | null | undefined): string {
-	if (!ts) return "";
-	return new Date(ts * 1000).toISOString().slice(0, 10);
-}
+
 
 export default async function ProfilePage({
 	params,
@@ -107,9 +104,7 @@ export default async function ProfilePage({
 	if (!user) notFound();
 
 	const avatar = avatarImageUrl(imagerBase ?? "", user.look, { size: "l" });
-	const registered = new Date(user.accountCreated * 1000)
-		.toISOString()
-		.slice(0, 10);
+	const registered = formatDate(new Date(user.accountCreated * 1000), "date");
 	const meId = Number(session?.user?.id);
 	const isLoggedIn = Number.isInteger(meId) && meId > 0;
 	const isSelf = isLoggedIn && meId === user.id;
@@ -601,7 +596,7 @@ export default async function ProfilePage({
 									}}
 								/>
 								<p className="muted" style={{ margin: "0.4rem 0 0" }}>
-									{formatTimestamp(p.timestamp)}
+									{formatDate(new Date(p.timestamp * 1000), "date")}
 								</p>
 							</div>
 						))}