fix: call loadCalldata from render() so tx decoding persists across popup close/reopen

Previously loadCalldata was only called from show(), meaning when the popup
was closed and reopened (triggering render() directly via restoreView), the
calldata decoding section was hidden and never re-fetched. Now render()
triggers loadCalldata for contract calls, so decoded data always appears.

Closes #60

src/popup/views/transactionDetail.js

@@ -93,9 +93,6 @@ function show(tx) {
         },
     };
     render();
-    if (tx.isContractCall || tx.direction === "contract") {
-        loadCalldata(tx.hash, tx.to);
-    }
 }
 
 function render() {
@@ -144,10 +141,14 @@ function render() {
         if (headingEl) headingEl.textContent = "Transaction";
     }
 
-    // Hide calldata section by default; loadCalldata will show it if needed
+    // Hide calldata section; re-fetch if this is a contract call
     const calldataSection = $("tx-detail-calldata-section");
     if (calldataSection) calldataSection.classList.add("hidden");
 
+    if (tx.isContractCall || tx.direction === "contract") {
+        loadCalldata(tx.hash, tx.to);
+    }
+
     $("tx-detail-time").textContent =
         isoDate(tx.timestamp) + " (" + timeAgo(tx.timestamp) + ")";
     $("tx-detail-status").textContent = tx.isError ? "Failed" : "Success";