`Uint8Array` pubkeys degrade to plain objects after `localStorage` round-trip

[drimchansky]

When account data is persisted to localStorage and restored on page reload, Uint8Array pubkeys are silently converted to plain objects ({0: 2, 1: 176, …}). This causes signing to fail with "length of pubkey is incorrect" because the signing pipeline expects a real Uint8Array.

See:

interchain-kit/packages/store/src/wallet-manager/chain-wallet-store.ts

Lines 89 to 93 in dcdabc8

	async getAccount(): Promise<WalletAccount> {
	const existed = this.store.getChainWalletState(this.wallet.info.name, this.chain.chainName)?.account;
	if (existed) {
	return existed;
	}

Reproduction

1. Connect a Cosmos wallet
2. Perform a successful transaction (works – pubkey is a real Uint8Array)
3. Reload the page (account is restored from localStorage)
4. Attempt to sign another transaction
5. Transaction fails with "length of pubkey is incorrect"