fix: show decoded swap details on success-tx view (closes #63)

Carry decoded calldata info (action name, description, token details,
amounts, addresses) from the approval confirmation view through to the
success-tx view. For swap transactions, this now shows the same decoded
details (protocol, action, token symbols, amounts) that appeared on the
signing confirmation screen.

Changes:
- approval.js: store decoded calldata in pendingTxDetails.decoded
- txStatus.js: carry decoded through state.viewData, render in success view
- index.html: add success-tx-decoded container element

src/popup/views/approval.js

@@ -184,6 +184,15 @@ function showTxApproval(details) {
         }
     }
 
+    // Carry decoded calldata info through to success/error views
+    if (decoded) {
+        pendingTxDetails.decoded = {
+            name: decoded.name,
+            description: decoded.description,
+            details: decoded.details,
+        };
+    }
+
     $("approve-tx-hostname").textContent = details.hostname;
     $("approve-tx-from").innerHTML = approvalAddressHtml(state.activeAddress);