CoinPay Wallet Extension v0.9.0 — addresses, not accounts

Changed "Accounts" are gone. They were a MetaMask concept with no counterpart in CoinPay, and they hid money. The web wallet derives per chain , taking that chain's next unused index — which is why a real wallet has BTC at indexes 0/1/2, SOL at 0/1, and POL only at 0. Grouping index N of every chain into "Account N+1" described nothing the portal actually has, and a balance sitting on SOL's second…