fix(api): normalize empty list responses

lib/api/games.ts

@@ -4,7 +4,7 @@ import type { Game } from "@/lib/types"
 import { httpJson } from "./http"
 
 type Paginated<T> = {
-  items: T[]
+  items: T[] | null
   meta: {
     total: number
     offset: number
@@ -16,7 +16,7 @@ export async function listGames(): Promise<Game[]> {
   const res = await httpJson<Paginated<Game>>("/api/v1/games?offset=0&limit=100", {
     cache: "no-store",
   })
-  return res.items
+  return res.items ?? []
 }
 
 export async function getGameById(gameId: string): Promise<Game | undefined> {