Implemented full wallet functionality for Mantle:
- Balance Checking: Real-time balance fetching for MNT, WMNT, USDC, and USDT.
- Transaction History: Robust fetching via Mobula API with support for pagination and filtering.
- Transaction Details: Detailed view for individual transactions, including status, hash, and value.
- Sending Functionality: Secure MNT and token transfers using Type 0 (Legacy) transactions and L1 fee estimation.
- Key Management: Derivation of Mantle addresses and FLO IDs from private keys (WIF/Hex).
- Navigation Enhancements:
- Clickable addresses in history and details for seamless navigation.
