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/actions/admin-bans.ts

@@ -2,8 +2,10 @@
 
 import { eq } from "drizzle-orm";
 import { revalidatePath } from "next/cache";
+import { redirect } from "next/navigation";
 import { requirePermissionRateLimited } from "@/lib/admin/guard";
-import { Ban, db, User } from "@/lib/db";
+import { tryGuardRank } from "@/lib/admin/rank-guard";
+import { Ban, db } from "@/lib/db";
 import { PERMS } from "@/lib/permissions";
 import { rcon } from "@/lib/services/rcon";
 import { logStaffActivity } from "@/lib/services/staff-activity";
@@ -26,16 +28,15 @@ export async function createBan(formData: FormData): Promise<void> {
 	const type = String(formData.get("type"));
 	if (!(userId > 0) || !BAN_TYPES.has(type)) return;
 
+	const guard = await tryGuardRank(userId, staff.rank);
+	if (!guard.ok && guard.reason === "rank") {
+		redirect("/admin/bans?error=rank");
+	}
+
 	const now = Math.floor(Date.now() / 1000);
 	// Emulator convention: banExpire 0 = permanent (not a far-future timestamp).
 	const banExpire = hours > 0 ? now + Math.floor(hours) * 3600 : 0;
 
-	const [user] = await db
-		.select({ username: User.username })
-		.from(User)
-		.where(eq(User.id, userId))
-		.limit(1);
-
 	await db.insert(Ban).values({
 		userId,
 		ip: "",
@@ -48,7 +49,7 @@ export async function createBan(formData: FormData): Promise<void> {
 		cfhTopic: -1,
 	});
 
-	if (user) await rcon.disconnectUser(userId, user.username);
+	if (guard.ok) await rcon.disconnectUser(userId, guard.target.username);
 	await logStaffActivity({
 		staffId: staff.id,
 		action: "user_ban",
@@ -63,6 +64,17 @@ export async function liftBan(formData: FormData): Promise<void> {
 	const staff = await requirePermissionRateLimited(PERMS.USERS_BAN);
 	const id = Number(formData.get("id"));
 	if (id > 0) {
+		const [ban] = await db
+			.select({ userId: Ban.userId })
+			.from(Ban)
+			.where(eq(Ban.id, id))
+			.limit(1);
+		if (ban) {
+			const guard = await tryGuardRank(ban.userId, staff.rank);
+			if (!guard.ok && guard.reason === "rank") {
+				redirect("/admin/bans?error=rank");
+			}
+		}
 		await db.delete(Ban).where(eq(Ban.id, id));
 		await logStaffActivity({
 			staffId: staff.id,