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/admin/users/_components/user-sanction-timeline.tsx

@@ -1,11 +1,7 @@
+import { formatDate } from "@/lib/format-date";
 import Link from "next/link";
 import type { SanctionEvent } from "../_lib/load-user-sanctions";
 
-function fmt(ts: number): string {
-	if (!ts) return "—";
-	return new Date(ts * 1000).toISOString().slice(0, 16).replace("T", " ");
-}
-
 const KIND_CLASS: Record<SanctionEvent["kind"], string> = {
 	ban: "bg-[var(--admin-error-subtle)] text-[var(--admin-error)]",
 	lift: "bg-[var(--admin-success-subtle)] text-[var(--admin-success)]",
@@ -32,7 +28,7 @@ export function UserSanctionTimeline({
 				<h3 className="text-sm font-semibold m-0">Sanctions timeline</h3>
 				{muted ? (
 					<span className="text-xs font-bold px-2 py-0.5 rounded-full bg-[var(--admin-accent)]/20 text-[var(--admin-accent)]">
-						Muted until {fmt(muteUntil)}
+						Muted until {formatDate(new Date(muteUntil * 1000))}
 					</span>
 				) : null}
 			</div>
@@ -66,7 +62,7 @@ export function UserSanctionTimeline({
 										<span className="text-sm font-medium">{ev.label}</span>
 									)}
 									<span className="text-xs text-muted-foreground">
-										{fmt(ev.at)}
+										{formatDate(new Date(ev.at * 1000))}
 									</span>
 									{ev.actor ? (
 										<span className="text-xs text-muted-foreground">

src/app/admin/users/_lib/load-user-sanctions.ts

@@ -1,3 +1,4 @@
+import { formatDate } from "@/lib/format-date";
 import { isBanActive, unixNow } from "@/lib/bans";
 import { prisma } from "@/lib/prisma";
 
@@ -121,7 +122,7 @@ export async function loadUserSanctions(
 			at: now,
 			kind: "status",
 			label: "Mute active",
-			detail: `Until ${new Date(muteUntil * 1000).toISOString().slice(0, 16).replace("T", " ")}`,
+			detail: `Until ${formatDate(new Date(muteUntil * 1000))}`,
 		});
 	}