fix(frontend): 修复添加新账号时旧状态未清除的问题
问题: logoutCurrentAccount() 方法只清除了 5 个状态，导致添加新账号时
旧账号的钱包地址、助记词备份状态等仍然存在，影响新账号创建/导入流程。
修复: 现在清除全部 16 个账号相关状态:
- Token: accessToken, refreshToken
- 账号信息: userSerialNum, username, avatarSvg, avatarUrl,
referralCode, inviterSequence, isAccountCreated
- 钱包信息: walletAddressBsc, walletAddressKava, walletAddressDst,
mnemonic, isWalletReady, isMnemonicBackedUp
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
hailin
2a4efe0828