076: Wallet Session Persistence and Auto-Reconnect

[bakarezainab]

#076: Wallet Session Persistence and Auto-Reconnect

Category: [FRONTEND]
Difficulty: ● MEDIUM
Tags: wallet, session, freighter, provider, ux

Description

Extend WalletProvider.tsx to persist the last connected wallet name in localStorage and silently attempt reconnection on page load. If the wallet extension is unavailable, show a persistent banner instead of silently failing. Guard all contract invocations against a disconnected state.

Acceptance Criteria

• Last wallet name persisted in localStorage and restored on load.
• Silent reconnection attempted before rendering protected pages.
• Banner displayed when wallet extension not detected.
• All Soroban invoke calls behind a requireWallet guard that prompts connect if needed.
• isConnecting state correctly reflects the reconnection attempt.