disabled-auto-sync-wallet-page

[ajey35]

Disabled Auto-Sync on Wallet Page

This PR fixes #58 that the wallet page does not auto-sync and only loads data from cache unless the user manually refreshes.

Verified Changes

• updateBalance, updateTransactions, updateUtxos now return early when useCache === true.
• Wallet initialization uses cache-only loading.
• Manual refresh still triggers network fetches (useCache === false).

Behavior

• First visit (no cache): Empty/zero values, no network calls.
• Cached visit: Instant load from cache, no network calls.
• Refresh click: Network calls execute and cache updates.

File Changed

• src/components/wallet/Wallet.js