Deduplicate TimeRange type in frontend type definitions

frontend/src/types/history.ts

@@ -2,8 +2,10 @@
  * TypeScript types for the ban history API.
  */
 
+import type { TimeRange } from "./ban";
+
 /** Optional time-range filter for history queries. */
-export type TimeRange = "24h" | "7d" | "30d" | "365d";
+export type { TimeRange };
 
 /** A single row in the history ban-list table. */
 export interface HistoryBanItem {

frontend/src/types/map.ts

@@ -2,8 +2,10 @@
  * TypeScript types for the world-map / bans-by-country API.
  */
 
+import type { TimeRange } from "./ban";
+
 /** Time-range preset for filtering queries. */
-export type TimeRange = "24h" | "7d" | "30d" | "365d";
+export type { TimeRange };
 
 /** A single enriched ban item as returned by the by-country endpoint. */
 export interface MapBanItem {