state: Add a global "Refresh Data" UI button

[AlAfiz]

Description

Sometimes blockchain data gets slightly out of sync or a user just wants to force the UI to pull the latest pool balances.
Instead of making them hard-refresh the entire browser tab, we need a small "Refresh" icon button near the top of the swap card.
When clicked, it should spin for 1-2 seconds and trigger a state update for the mocked balances.
This gives users a feeling of direct control over the application's data layer.

Requirements

• Add a small circular "Refresh" SVG icon button to the top right of the swap card.
• Attach an onClick handler that sets an isRefreshing boolean state to true.
• Add the Tailwind animate-spin class to the icon while isRefreshing is true.
• Use a setTimeout to reset the state back to false after 1.5 seconds, simulating a network fetch.