Unfunded account errors on custom networks #2616
Description
From a dev:
During local development, the browser wallet showed "not enough funds" errors when trying to interact with the contract. The wallet was funded on the local standalone network but the error message was confusing — transactions could still be signed and submitted successfully, but the misleading insufficient-funds warning took a while to diagnose. The issue was simply that the wallet only had local network funds and the wallet UI was checking balances against testnet/pubnet, but it didn't block actual transaction signing on the local network.