refactor(web): reuse the shared address formatter in the round hook (#258)

Author: s6pa1rta3n-lab

apps/web/src/hooks/useRoundSession.ts

@@ -37,6 +37,7 @@ import { DEMO_TRACE } from "../demo/trace";
 import { formatCountdown, useDrandCountdown } from "./useDrandCountdown";
 import { useToast } from "../ui/Toast";
 import { useTime } from "../lib/time";
+import { shortAddr } from "../lib/format";
 
 export type ActionStatus = "idle" | "working" | "ok" | "error";
 
@@ -469,8 +470,3 @@ export function useRoundSession(active: UseCase) {
     refresh,
   };
 }
-
-function shortAddr(addr: string, len = 6) {
-  if (addr.length <= len * 2 + 3) return addr;
-  return `${addr.slice(0, len)}…${addr.slice(-len)}`;
-}