fix: invite系の戻り値が間違っている close #12517 (#12518)

packages/backend/src/server/api/endpoints/admin/invite/create.ts

@@ -33,13 +33,7 @@ export const meta = {
 		items: {
 			type: 'object',
 			optional: false, nullable: false,
-			properties: {
-				code: {
-					type: 'string',
-					optional: false, nullable: false,
-					example: 'GR6S02ERUA5VR',
-				},
-			},
+			ref: 'InviteCode',
 		},
 	},
 } as const;

packages/backend/src/server/api/endpoints/admin/invite/list.ts

@@ -21,6 +21,7 @@ export const meta = {
 		items: {
 			type: 'object',
 			optional: false, nullable: false,
+			ref: 'InviteCode',
 		},
 	},
 } as const;