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/rare-values/page.tsx

@@ -6,6 +6,7 @@ import {
 	deleteValue,
 } from "@/actions/admin-rare-values";
 import { StatusCard } from "@/components/admin/dashboard";
+import { Button } from "@/components/ui/button";
 import { prisma } from "@/lib/prisma";
 import { redirect } from "next/navigation";
 import { canAccess, getAdminContext, PERMS } from "@/lib/permissions";
@@ -82,9 +83,9 @@ export default async function AdminRareValues() {
 						placeholder={t("priorityPlaceholder")}
 						className="w-[110px]"
 					/>
-					<button type="submit" className="btn btn-primary">
+					<Button type="submit" variant="default">
 						{t("addCategoryButton")}
-					</button>
+					</Button>
 				</div>
 			</form>
 
@@ -120,9 +121,9 @@ export default async function AdminRareValues() {
 								</div>
 								<form action={deleteCategory}>
 									<input type="hidden" name="id" value={catId} />
-									<button type="submit" className="btn btn-danger">
+									<Button type="submit" variant="destructive">
 										{t("deleteCategory")}
-									</button>
+									</Button>
 								</form>
 							</div>
 
@@ -158,9 +159,9 @@ export default async function AdminRareValues() {
 											<td>
 												<form action={deleteValue}>
 													<input type="hidden" name="id" value={String(v.id)} />
-													<button type="submit" className="btn btn-danger">
+													<Button type="submit" variant="destructive">
 														✕
-													</button>
+													</Button>
 												</form>
 											</td>
 										</tr>
@@ -215,9 +216,9 @@ export default async function AdminRareValues() {
 											</option>
 										))}
 									</select>
-									<button type="submit" className="btn btn-primary">
+									<Button type="submit" variant="default">
 										{t("itemForm.addValue")}
-									</button>
+									</Button>
 								</div>
 							</form>
 						</div>