Add Loading Indicator for WalletConnect on Mobile

[0xtpsl]

Screenshot

Issue Description

When connecting a wallet on mobile devices, clicking a wallet icon shows no immediate response. It takes 1-2 seconds before the wallet app is invoked, making the DApp feel unresponsive or stuck.

Cause

Mobile connections use WalletConnect, which requires pre-requisite requests (e.g., session setup) that cause this delay.

Suggested Improvement

Display a loading spinner or indicator immediately after clicking the icon, until the wallet app is launched. This provides visual feedback and improves user experience.

Thank you!