P1-P3 admin cleanup: rank guard, SSRF guard, count caching, dead code removal, pagination rewrite

- P1: new src/lib/admin/rank-guard.ts with tryGuardRank/guardRank + RankGuardTarget/Result; extracted from users.ts; applied to admin-bans (create/lift + rank redirect) and admin-badges (caps + rank guard + error surfacing); import-url-safety.ts SSRF guard wired into clone save+icon fetch; logAudit await in help-tickets; antiddos mutations SETTINGS_EDIT; markAllAlertsRead NOTIFICATIONS_EDIT; rankError/saveError in all 25 message files; tests rew/new for bans/badges/rank-guard/import-url-safety

- P2: ticket-inbox merged pagination reworked to single UNION ALL SQL with LIMIT/OFFSET (avoids O(offset) materialization); getCachedAdminCount with cacheFiltered option applied to devops/errors/photos/items/guilds/help-tickets/moderation pages; admin-theme catches→?error=1+banner+25 locales; logger in silent catches (rare-values/writeable-boxes); catalog-items-loader CAST→plain equality; count caching helper extended with opt-in cacheFiltered

- P3: removed dead modules is-staff/notice/recent-furni-resync/log-filters plus load-user-sanctions/user-sanction-timeline; removed orphaned CATALOG_PAGE_COLUMNS re-export; removed getFurniIconUrl from studio-furni-icons

Build: lint 0, typecheck 0, 3480 tests pass, i18n:check exit 0, colors exit 0. Circular chunk warning (9452/10535/66463) is webpack code-splitting artifact; build succeeds.

src/app/admin/devops/errors/page.tsx

@@ -1,10 +1,11 @@
-import { count, desc } from "drizzle-orm";
+import { desc } from "drizzle-orm";
 import { redirect } from "next/navigation";
 import { getTranslations } from "next-intl/server";
 import { Card, CardContent } from "@/components/ui/card";
 import { db, EmulatorErrors } from "@/lib/db";
 import { formatDate } from "@/lib/format-date";
 import { canAccess, getAdminContext, PERMS } from "@/lib/permissions";
+import { getCachedAdminCount } from "@/lib/services/admin-stats";
 
 export default async function EmulatorErrorsPage({
 	searchParams,
@@ -21,17 +22,16 @@ export default async function EmulatorErrorsPage({
 	const page = Math.max(1, Number(params.page) || 1);
 	const perPage = 50;
 
-	const [errors, totalRows] = await Promise.all([
+	const [errors, total] = await Promise.all([
 		db
 			.select()
 			.from(EmulatorErrors)
 			.orderBy(desc(EmulatorErrors.id))
 			.limit(perPage)
 			.offset((page - 1) * perPage),
-		db.select({ total: count() }).from(EmulatorErrors),
+		getCachedAdminCount(EmulatorErrors, "emulator_errors"),
 	]);
 
-	const total = Number(totalRows[0]?.total ?? 0);
 	const lastPage = Math.ceil(total / perPage);
 
 	return (