Fix EVM transaction explorer links - all transactions open Etherscan

[Dianaaiym]

Previously, each EVM chain transaction correctly opened its own block explorer (e.g. BscScan for BSC, Arbiscan for Arbitrum, etc.).
Now, all EVM transactions incorrectly open Etherscan, regardless of the network.

This regression needs to be fixed so each chain links to the correct explorer.

In Transaction Info, “View on Explorer” should open the right block explorer for each chain:

• Ethereum → etherscan.io
• BNB Smart Chain → bscscan.com
• Polygon → polygonscan.com
• Arbitrum → arbiscan.io
• Optimism → optimistic.etherscan.io
• Base → basescan.org
• Avalanche → snowtrace.io
• Gnosis → gnosisscan.io