fix: address all 3 violations from #59

1. Protocol name now has Etherscan link (was appearing clickable but wasn't)
2. Token contract addresses: symbol shown separately, then color dot +
   full address + Etherscan link (symbol no longer interposed)
3. Raw data section moved after transaction hash (no longer pushes
   useful info off screen)

src/popup/views/transactionDetail.js

@@ -40,7 +40,7 @@ function blockieHtml(address) {
 function etherscanLinkHtml(url) {
     return (
         `<a href="${url}" target="_blank" rel="noopener" ` +
-        `class="inline-flex items-center"` +
+        `class="inline-flex items-center border border-border px-1 hover:bg-fg hover:text-bg cursor-pointer"` +
         `>${EXT_ICON}</a>`
     );
 }