chore(web): add copyright headers to web lib core helpers (#207)

Author: s6pa1rta3n-lab

apps/web/src/lib/chain.ts

@@ -1,3 +1,4 @@
+// Copyright (c) 2026 Sub Rosa contributors
 import { Buffer } from "buffer";
 import {
   getAddress,

apps/web/src/lib/config.ts

@@ -1,3 +1,4 @@
+// Copyright (c) 2026 Sub Rosa contributors
 export interface ConfigIssue {
   key: string;
   message: string;

apps/web/src/lib/demoActions.ts

@@ -1,3 +1,4 @@
+// Copyright (c) 2026 Sub Rosa contributors
 import { Buffer } from "buffer";
 import { Keypair } from "@stellar/stellar-sdk";
 import {

apps/web/src/lib/demoTypes.ts

@@ -1,3 +1,4 @@
+// Copyright (c) 2026 Sub Rosa contributors
 export interface AttackStep {
   label: string;
   ok: boolean;