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/marketplace/page.tsx

@@ -4,17 +4,14 @@ import { getTranslations } from "next-intl/server";
 import { cancelMarketplaceListing } from "@/actions/admin-marketplace";
 import { AdminSimplePager } from "@/components/admin/admin-simple-pager";
 import { StatusCard } from "@/components/admin/dashboard";
+import { Button } from "@/components/ui/button";
 import { calcPagination, parseListParams } from "@/lib/admin-helpers";
 import { canAccess, getAdminContext, PERMS } from "@/lib/permissions";
+import { formatDate } from "@/lib/format-date";
 import { prisma } from "@/lib/prisma";
 
 export const dynamic = "force-dynamic";
 
-function fmt(ts: number): string {
-	if (!ts) return "—";
-	return new Date(ts * 1000).toISOString().slice(0, 16).replace("T", " ");
-}
-
 export default async function AdminMarketplacePage({
 	searchParams,
 }: {
@@ -80,18 +77,24 @@ export default async function AdminMarketplacePage({
 			) : null}
 
 			<div className="mb-4 flex flex-wrap gap-2">
-				<Link
-					href="/admin/marketplace?filter=active"
-					className={`btn btn-sm ${filter === "active" ? "btn-primary" : "btn-ghost"}`}
+				<Button
+					variant={filter === "active" ? "default" : "ghost"}
+					size="sm"
+					asChild
 				>
-					{t("filterActive")}
-				</Link>
-				<Link
-					href="/admin/marketplace?filter=sold"
-					className={`btn btn-sm ${filter === "sold" ? "btn-primary" : "btn-ghost"}`}
+					<Link href="/admin/marketplace?filter=active">
+						{t("filterActive")}
+					</Link>
+				</Button>
+				<Button
+					variant={filter === "sold" ? "default" : "ghost"}
+					size="sm"
+					asChild
 				>
-					{t("filterSold")}
-				</Link>
+					<Link href="/admin/marketplace?filter=sold">
+						{t("filterSold")}
+					</Link>
+				</Button>
 			</div>
 
 			<div className="grid grid-cols-[repeat(auto-fit,minmax(180px,1fr))] gap-3.5 mb-6">
@@ -135,20 +138,21 @@ export default async function AdminMarketplacePage({
 											</Link>
 										</td>
 										<td>{row.price}</td>
-										<td className="muted">{fmt(row.timestamp)}</td>
+										<td className="muted">{formatDate(new Date(row.timestamp * 1000))}</td>
 										{filter === "sold" ? (
-											<td className="muted">{fmt(row.soldTimestamp)}</td>
+											<td className="muted">{formatDate(row.soldTimestamp ? new Date(row.soldTimestamp * 1000) : null)}</td>
 										) : null}
 										{canEdit && filter === "active" ? (
 											<td>
 												<form action={cancelMarketplaceListing}>
 													<input type="hidden" name="id" value={row.id} />
-													<button
+													<Button
 														type="submit"
-														className="btn btn-ghost btn-sm"
+														variant="ghost"
+														size="sm"
 													>
 														{t("cancel")}
-													</button>
+													</Button>
 												</form>
 											</td>
 										) : null}